IRC chat logs for #ltsp on irc.libera.chat (webchat)
Channel log from 5 November 2011 (all times are UTC)
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| 03:42 | <alkisg> Hey vagrantc, how's it going?
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| 03:44 | <vagrantc> alkisg: just tidying up a few things ... should upload tonight
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| 03:45 | <alkisg> Nice! Need me to do something? Also, is there any page that shows the progress of the uploads?
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| 03:46 | <vagrantc> alkisg: http://ftp-master.debian.org/new.html
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| 03:46 | <alkisg> Did the lxde notification problem appear again?
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| 03:47 | <vagrantc> alkisg: don't think so
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| 03:47 | <alkisg> Phiew :)
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| 03:50 | <vagrantc> alkisg: my guess is the brokenness with the vnc session stuff or something might have broken it
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| 03:51 | <alkisg> OK so what I have left in my notes, is to check the volume muting with read-only nfs root
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| 03:51 | <vagrantc> oh yeah
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| 03:52 | <alkisg> vagrantc: Files: epoptes-client/lock-screen 11Copyright: 2010 Fotis Tsamis <ftsamis@gmail.com> 12License: GPL-2.0+
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| 03:53 | => erm, let me just change that to 3.... :)
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| 03:53 | <vagrantc> one last test, and if everything mostly works, i'll upload
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| 03:53 | alkisg: it's 2+, so it should be fine
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| 03:53 | <alkisg> It's just by mistake though
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| 03:53 | <vagrantc> alkisg: we can opt to use it on 3+
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| 03:53 | <alkisg> Not intentional
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| 03:53 | OK
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| 03:53 | <vagrantc> alkisg: if you'd rather
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| 03:53 | <alkisg> If we can change it on the next upload, no problem
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| 03:54 | We'll fix it in a couple of days then
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| 03:54 | Ah you also need the gpl2 then... hmm... well no problem by us, the gpl2 part there was just a mistake
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| 03:55 | * alkisg removes the gpl2 stuff... | |
| 03:55 | <vagrantc> well, i've got to do another build anyways.
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| 03:56 | alkisg: oh, you moved the epoptes-client binary?
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| 03:56 | <alkisg> Yes, and put a manpage
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| 03:56 | I thought I'd make it easier for certificate fetching
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| 03:56 | Just "sudo epoptes-client -c" or "su -; epoptes-client -c" instead of /usr/share/..
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| 03:57 | <vagrantc> alkisg: the if-up.d hook needs to be updated
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| 03:57 | * vagrantc tests | |
| 03:59 | <alkisg> vagrantc: pull, I did the GPL2 => 3 change
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| 04:00 | Ah, you mean that it needs a license too? putting it...
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| 04:01 | Should I put it on postinst too then?
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| 04:01 | <vagrantc> alkisg: no, the if-up.d hook needs the new location ... it's in /usr/sbin now?
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| 04:02 | <alkisg> Ouch
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| 04:02 | That's why it didn't launch for you then
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| 04:02 | * alkisg was testing only with installing epoptes, not the client part | |
| 04:03 | <vagrantc> alkisg: dare i say it ... broadcast teacher doesn't work
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| 04:04 | <alkisg> @(@#*&$((*$(*# +1
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| 04:04 | <vagrantc> i think we've got enough functionality to upload to experimental
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| 04:04 | <alkisg> Let's check the broadcast 1 minute
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| 04:04 | <vagrantc> sure
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| 04:05 | <alkisg> vagrantc: '-allow', '127.,192.168.,10.,169.254.' => are you on those subnets?
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| 04:06 | <vagrantc> alkisg: 192.168.33.*
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| 04:06 | <alkisg> OK, it's not that...
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| 04:06 | <vagrantc> so it won't work with internet routeable addresses?
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| 04:07 | <alkisg> Not with the current "-allow" line
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| 04:07 | <vagrantc> alkisg: there's no epoptes-client running for the "teacher" session ... should there be?
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| 04:08 | <alkisg> There should be, although I'm not 100% sure as we did some late changes there
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| 04:08 | It wouldn't matter though
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| 04:08 | That's just to allow other teachers to control this teacher
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| 04:08 | (in case that's ever needed)
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| 04:08 | teacher pc: x11vnc -noshm -nopw -quiet -viewonly -shared -forever -nolookup -24to32 -rfbport 1234 -allow 127.,192.168.,10.,169.254.
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| 04:09 | <alkisg> Ah, the "student" part is long :(
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| 04:10 | vagrantc: on SCREEN_02=shell, do you get a pid with that? pidof -s ldm gdm-simple-greeter gnome-session | cut -d' ' -f1
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| 04:11 | <vagrantc> alkisg: i get a pid
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| 04:13 | alkisg: what next?
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| 04:14 | <alkisg> eval $(tr '\0' '\n' < /proc/$p/environ | egrep '^DISPLAY=|^XAUTHORITY=')
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| 04:14 | export DISPLAY XAUTHORITY
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| 04:14 | ./execute xvnc4viewer -Shared -ViewOnly -FullScreen -UseLocalCursor=0 -MenuKey F13 $SERVER:1234
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| 04:14 | Where $p the pid
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| 04:15 | so do a p=$(pidof ...)
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| 04:15 | <vagrantc> Traceback (most recent call last):
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| 04:15 | File "/usr/lib/python2.7/dist-packages/epoptes/ui/gui.py", line 254, in broadcastTeacher
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| 04:15 | EPOPTES_VNCVIEWER_PID=$( ./execute xvnc4viewer -Shared -ViewOnly -FullScreen -UseLocalCursor=0 -MenuKey F13 $SERVER:%d)""" % port, root=True)
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| 04:15 | UnboundLocalError: local variable 'port' referenced before assignment
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| 04:15 | alkisg: i didn't even do the stuff you did, just looked in ~/.xsession-errors on the "teacher"
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| 04:16 | <alkisg> Ouch, another one with the port. That must be my most buggy commit ever :D
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| 04:16 | <vagrantc> but probably very fixable
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| 04:17 | <alkisg> I wonder why it works for me though, let me debuild again...
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| 04:18 | <vagrantc> alkisg: unless i'm still running the older version somehow
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| 04:18 | <alkisg> Does opening a "root shell, local" work for you?
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| 04:19 | vagrantc: ah ok got it
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| 04:19 | It only runs the first time
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| 04:19 | * vagrantc had to reboot | |
| 04:19 | <alkisg> Because I use port as a local var instead of an object var
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| 04:20 | Hmm no
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| 04:22 | <vagrantc> "root, locally" works
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| 04:23 | <alkisg> The broadcasting problem would happen if you tried broadcasting on one client, then on another one
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| 04:23 | Without stopping the broadcasting inbetween
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| 04:24 | Fixing that anyway, let's see if that's all...
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| 04:24 | vagrantc: what's the name of the lxsession?
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| 04:24 | Any dash anywhere? Is it just "lxsession"?
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| 04:25 | <vagrantc> /usr/bin/lxsession -s LXDE -e LXDE
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| 04:25 | <alkisg> OK, that will help for standalone clients with lxde
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| 04:26 | And we'll probably need something for standalone kde clients too in the future, /me notes that down
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| 04:27 | <vagrantc> this is LXDE on both teacher and student/ltsp login
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| 04:28 | alkisg: did you fix the sudo issue? i guess i could uninstall sudo to test
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| 04:28 | <alkisg> No, not yet
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| 04:28 | <vagrantc> so then i should recommend sudo
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| 04:29 | on epoptes-client?
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| 04:29 | <alkisg> No, give me some time to fix that too
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| 04:29 | vagrantc: should we at least change port 569 to 789?
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| 04:30 | <vagrantc> i never really looked into that stuff... hmmm.
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| 04:31 | alkisg: neither are in /etc/services
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| 04:31 | <alkisg> I think we should at least do that, before pushing to experimental
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| 04:31 | vagrantc: I checked the IANA assigned ports, 569 is reserved by ms-roma, 789 is unassigned
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| 04:32 | <vagrantc> alkisg: ok. that's an easy fix, right?
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| 04:32 | <alkisg> Yup
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| 04:33 | vagrantc: I just pushed a possible fix for the broadcasting
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| 04:36 | * vagrantc buildls | |
| 04:36 | <alkisg> ...and I changed the port
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| 04:36 | ...on to sudo...
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| 04:36 | * vagrantc rebuilds | |
| 04:44 | <vagrantc> testing....
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| 04:45 | <alkisg> vagrantc: I removed sudo, although now the root screen shell is a bit like SCREEN_02=shell, without $HOME defined etc
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| 04:45 | No harm done, I'll fix those in 2 days in a cleaner way
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| 04:45 | <vagrantc> alkisg: so, when i broadcast, i get a notification "ltsp79: down"
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| 04:45 | <alkisg> Ahermwhat?
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| 04:45 | OK let's do it manually
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| 04:46 | Also, "down"? Not "terminated"?!
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| 04:46 | <vagrantc> don't remember... it displays briefly
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| 04:47 | <alkisg> Are you logged on on the client?
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| 04:47 | Logoff, let's try broadcasting while in ldm first
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| 04:48 | <vagrantc> can't get it to repeat
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| 04:48 | <alkisg> If I understood correctly, the root epoptes-client crashed
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| 04:48 | <vagrantc> so i'm at the login screen ... epoptes doesn't see the client
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| 04:48 | <alkisg> Right
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| 04:48 | So switch to screen_02
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| 04:48 | and run epoptes-client
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| 04:48 | And try broadcasting again, and check for errors
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| 04:49 | Both in the teacher .xsession-errors, and on the client screen_02
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| 04:49 | <vagrantc> alkisg: boom.
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| 04:49 | <alkisg> Message?
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| 04:49 | <vagrantc> hexdump: not found
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| 04:49 | <alkisg> Oooops ok
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| 04:49 | Deps, deps :D
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| 04:49 | <vagrantc> arithmetic expression: expecting primary: ...
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| 04:50 | install bsdmainutils?
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| 04:50 | <alkisg> Gimme 1 min
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| 04:50 | vagrantc: do you have sleep 0.3 in debian? (decimals)?
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| 04:51 | <vagrantc> alkisg: well, installing bsdmainutils got a different issue, and epoptes-client didn't crash
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| 04:51 | <alkisg> What issue?
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| 04:52 | <vagrantc> alkisg: broadcasting doesn't crash epoptes-client anymore
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| 04:52 | <alkisg> And switching to screen 07, does broadcasting work?
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| 04:52 | <vagrantc> "error: couldn't find suitable pixmap format"
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| 04:52 | is what's on the LDM screen
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| 04:53 | ah... but also errors...
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| 04:53 | "could not create .vnc directory: read-only file system."
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| 04:53 | <alkisg> Ah, that's probably it then
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| 04:54 | vagrantc: from the epoptes gui, try selecting the client and executing this command: sudo xterm
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| 04:54 | You should get an xterm over ldm
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| 04:54 | (or x-terminal-emulator, whatever you have)
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| 04:55 | <vagrantc> ok, i set HOME=/root and re-ran epoptes-client ...
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| 04:55 | still get the pixmap error, but the .vnc thing is fixed
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| 04:55 | <alkisg> /root is writeable?!
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| 04:55 | <vagrantc> alkisg: yes
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| 04:55 | <alkisg> OK, let's see about the pixmap error...
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| 04:56 | <vagrantc> at some point some LTSP stuff required that... so i added it to LTSP_RW_DIRS
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| 04:56 | so close
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| 04:56 | <alkisg> Try the sudo xterm command from above
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| 04:56 | It'll give you an xterm over ldm, which has access to X
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| 04:57 | From that xterm we can better try xvnc4viewer
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| 04:57 | <vagrantc> ok
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| 04:57 | <alkisg> The command is: xvnc4viewer -Shared -ViewOnly -FullScreen -UseLocalCursor=0 -MenuKey F13 server:1234 => but you need to find out the server port with netstat
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| 04:57 | And we probably need to play with the xvnc4viewer parameters to see why it complains
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| 04:58 | <vagrantc> or just look in ~/.xsession-errors for the port :)
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| 04:58 | <alkisg> Right :D
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| 04:59 | <vagrantc> same error about the pixmap format
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| 04:59 | and then segfault
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| 05:00 | <alkisg> http://www.karlrunge.com/x11vnc/faq.html
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| 05:00 | Q-28: My X display is depth 24 at 24bpp (instead of the normal depth 24 at 32bpp.) I'm having lots of color and visual problems with x11vnc and/or vncviewer. What's up?
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| 05:01 | That paragraph explains the problems
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| 05:01 | Btw, didn't you have X_COLORDEPTH=16 as the default in Debian?
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| 05:01 | If you use that, it'll solve all those 24to32 problems, and make your X faster too...
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| 05:02 | <vagrantc> long time ago
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| 05:02 | now i let X figure out what the best default is, rather than forcing it
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| 05:03 | <alkisg> vagrantc: I think we should try switching from xvnc4viewer to ssvncviewer, but that'll require a bit more testing
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| 05:03 | * vagrantc sighs | |
| 05:03 | <alkisg> So, if you switch to 16 bpp and it works, maybe you can upload as it is?
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| 05:03 | <vagrantc> sure
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| 05:03 | <alkisg> 24bpp cards are rare, you're the second I see with that...
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| 05:04 | <vagrantc> it's a virtual machine
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| 05:04 | <alkisg> OK, give it a try with X_COLOR_DEPTH=16
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| 05:04 | <vagrantc> already booting :)
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| 05:05 | alkisg: works like a charm
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| 05:05 | <alkisg> vagrantc: I don't know if anyone told you that, but you're the best suited man for package maintainer
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| 05:06 | You hit every bug that was there, and even a few unknown ones :D
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| 05:06 | <vagrantc> alkisg: because i test corner cases :)
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| 05:07 | <alkisg> Let's not forget the bsdmainutils dependency
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| 05:07 | <vagrantc> alkisg: you commit or i?
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| 05:07 | <alkisg> vagrantc: can you? It's 1 and I'd better head to bed, long trip tomorrow...
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| 05:07 | <vagrantc> sure
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| 05:07 | i guess we're ready to upload?
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| 05:07 | <alkisg> Thanks a lot man, that was quite the job
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| 05:08 | Yup
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| 05:08 | <vagrantc> it's quite an impressive piece of software :)
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| 05:08 | * alkisg writes some TODOs here: | |
| 05:09 | <alkisg> 1) Find xauthority etc in standalone kde, xfce etc clients
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| 05:09 | 2) Check ssvncviewer instead of xvnc4viewer wrt 24bpp
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| 05:09 | 3) Set $HOME etc in the root client from the start
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| 05:11 | * vagrantc didn't test the sudo-less root terminal | |
| 05:11 | <vagrantc> yet
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| 05:11 | <alkisg> It was sudo-less in the past, it just leaves $HOME unset
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| 05:11 | And I was looking for a "proper" way to set it, like a login, not just HOME=xx
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| 05:12 | But bash -l doesn't do what it promises, and su - takes RAM
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| 05:12 | <Lumiere> could you source a configuration file?
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| 05:12 | <alkisg> sudo -i doesn't take RAM, but I don't like it as a dependency
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| 05:12 | Lumiere: it's about the same as manually setting HOME, no?
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| 05:13 | That's probably the best way though, to just set it and be done with it :)
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| 05:15 | <Lumiere> I just wish I knew what process gave it to bash
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| 05:15 | <alkisg> Time for bed, good night all, thanks again vagrantc :)
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| 06:03 | <vagrantc> uploaded epoptes to Debian experimental! will be stuck in new queue for a few days
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| 10:45 | <alkisg> Woot! http://ftp-master.debian.org/new/epoptes_0.3.1-1.html
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| 11:15 | <andygraybeal> ssup sup!
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| 11:15 | :)
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| 11:15 | wake up wake up wakeup
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| 12:01 | tdn has joined IRC (tdn!~tdn@1503ds1-van.0.fullrate.dk) | |
| 12:02 | <tdn> I am trying to set up PXE boot. I have installed and configured dhcp server as well as tftpd. However, for some reason it seems that tftpd does not listen on port 69 as it should. (when looking with ss -lpnu) What to do?
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| 12:02 | Well.. According to netstat it does listen: udp 0 0 0.0.0.0:69 0.0.0.0:* 4492/in.tftpd
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| 12:03 | However, when I do "echo 'get pxelinux.0' | atftp localhost", I get timeout
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| 12:03 | Oh. It does not listen directly on localhost.
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| 12:29 | Ok. So I have configured dhcpd and tftpd. However, when I boot up a client, the following happens in the log in the server: http://paste.adora.dk/P2214.txt
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| 12:30 | The client gets an IP from the server as well as gateway IP. Then it tries tftp, however, it times out on the client.
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| 12:30 | How do I investigate this?
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| 12:31 | Client writes: TFTP open timeout.
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| 12:31 | PXE-E32
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| 12:32 | tftp only uses udp, right?
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| 12:38 | I can get the file via tftp with: echo 'get pxelinux.0' | atftp 10.0.0.254
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| 13:12 | <tdn> This is output from tcpdump: http://paste.adora.dk/P2215.html
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| 15:07 | <Hyperbyte> tdn, hi!
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| 15:08 | Which distro/version?
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| 15:08 | If it's Ubuntu, paste your /etc/ltsp/dhcpd.conf
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| 15:50 | <cliebow> Wow: epoptes
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| 16:40 | <andygraybeal> cliebow, you like epoptes? i can't wait to lok at it
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| 16:50 | DonAlex has joined IRC (DonAlex!~DonAlex@roosoft.gotadsl.co.uk) | |
| 16:50 | <DonAlex> Evening guys..
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| 16:51 | Having a strange NBD-server issue.. wonder if anyone can help..
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| 16:51 | logs are showing "nbd_server[29395]: getpeername failed: Transport endpoint is not connected"
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| 16:51 | <DonAlex> and the client is showing "Negotiation: Error: INIT_PASSWD bad"
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| 16:52 | There is an entry in the hosts file for the client machine so is it really failing on n reverse lookup or am I missing something else?
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| 17:05 | <Hyperbyte> DonAlex, which distro/version?
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| 17:05 | <DonAlex> Debian 6.0
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| 17:05 | <Hyperbyte> Hrm, don't know anything about Debian.
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| 17:05 | Has the client ever worked?
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| 17:06 | <DonAlex> actually trying to get xbmc-diskless up and running.. but the command to spawn a nbd root seems to fail silently
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| 17:06 | So I have tracked it down to a nbd issue.. and running it by hand seems to also fail silently.
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| 17:07 | The command pinched from ltsp is nbdrootd and it pushes this out "exec nbd-server 0 /var/lib/xbmc-diskless/images/xbmc.img -r -C /dev/null"
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| 17:08 | <Hyperbyte> I have no idea what xbmc-diskless is, sorry. No experience with this.
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| 17:08 | <DonAlex> Well just think of it as a LTSP disk image then..
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| 17:08 | you use the nbdrootd script no?
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| 17:09 | via inetd to spawn a root mount for a Thin client?
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| 17:09 | <Hyperbyte> Yes, LTSP uses that.
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| 17:10 | <DonAlex> Ahh intersting..
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| 17:10 | I just ran strace on the above command and got this at the end..
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| 17:10 | connect(3, {sa_family=AF_FILE, path="/dev/log"...}, 110) = 0
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| 17:10 | sendto(3, "<27>Nov 5 17:10:03 nbd_server[81"..., 88, MSG_NOSIGNAL, NULL, 0) = 88
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| 17:10 | sendto(3, "<27>Nov 5 17:10:03 nbd_server[81"..., 46, MSG_NOSIGNAL, NULL, 0) = 46
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| 17:10 | write(2, "Error: getpeername failed: Socket"..., 67Error: getpeername failed: Socket operation on non-socket
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| 17:10 | Exiting.
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| 17:11 | So the server is barfing starting up..
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| 17:11 | there I was thinking it was the client at fault..
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| 17:13 | hmm seems kinda a genric error
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| 17:18 | ok .. so do you use nbdrootd from inetd.conf?
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| 17:19 | <Hyperbyte> DonAlex, yes, LTSP uses that.
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| 17:20 | <DonAlex> so can you give me and example of that line because I suspect that is what is stopping it starting.
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| 17:20 | Currently it is "2000 stream tcp nowait nobody /usr/sbin/tcpd /usr/sbin/nbdrootd /var/lib/xbmc-diskless/images/xbmc.img "
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| 17:21 | <Hyperbyte> So what is XBMC-diskless?
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| 17:21 | <DonAlex> HAve you heard of XBMC?
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| 17:21 | <Hyperbyte> No.
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| 17:21 | <DonAlex> Xbox Media Centre
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| 17:22 | <Hyperbyte> Ah.
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| 17:22 | <DonAlex> Easy enough to google.. Anyway.. just a thin client version of that..
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| 17:22 | <Hyperbyte> Your inetd.conf looks okay, compared to my inetd.conf generated by LTSP.
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| 17:22 | <DonAlex> It uses ltsp parts to it.. to serve up a thing client image..
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| 17:22 | in theory anyway..
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| 17:22 | <Hyperbyte> DonAlex, yes, but an LTSP inetd.conf is easy to Google as well. Don't be a smartass. ;-)
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| 17:23 | <DonAlex> Hyperbyte: Yeah.. ;) But as you can see from the line above it seems to look ok.. just wanted something working to compare it to
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| 17:24 | <Hyperbyte> DonAlex, only filename is different from your inetd.conf to mine.
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| 17:24 | <DonAlex> Hmm then I wonder why nbdrootd is failing? Could it be a nbd-server version?
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| 17:25 | I already corrected the -a that was in that script. .there is a comment about that and later nbd versions
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| 17:25 | <Hyperbyte> I have no idea. You're in the LTSP support channel, not the NBD support channel.
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| 17:25 | One of the LTSP developers could probably help you, but I'm just a user.
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| 17:25 | I can't tell you much more than what I've told you now.
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| 17:26 | But if you want my opinion: since you get some error about passwords from the NBD logs, I'd say there's something wrong in the NBD configuration, or with the image itself.
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| 17:26 | Wait, passwords?
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| 17:27 | Where did I get that from?
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| 17:27 | <DonAlex> Well that is what he client said..
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| 17:27 | not the server..
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| 17:27 | server complains about getpeerbyname failing.. but I have already added and entry to hosts
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| 17:28 | sorry getpeername
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| 17:28 | <Hyperbyte> DNS problem?
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| 17:28 | <DonAlex> nbd-client ulysse 2000 /dev/nbd0
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| 17:28 | Negotiation: Error: INIT_PASSWD bad
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| 17:28 | <Hyperbyte> Like I said... I'm no NBD export. :)
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| 17:28 | <DonAlex> Me neither ;)
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| 17:28 | but I have got NBD working before as a stand alone server thing..
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| 17:29 | <Hyperbyte> Maybe one of the developers can help you, but it is weekend... it's usually very quiet here during weekends.
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| 17:29 | <DonAlex> running it from the shell
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| 17:29 | fair enough. worth a shot anyways..
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| 17:45 | ahh wait..
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| 17:46 | hmm this seems to be something that will break ltsp
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| 17:46 | WARNING **: Specifying an export on the command line is deprecated.
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| 17:49 | Yeah I see where it breaks now..
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| 17:49 | nbd-server is expecting a config file..
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| 17:50 | with defined exports..
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| 17:50 | because it does not pass along a valid port it tries to read a config file
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| 19:21 | <cliebow> andygraybeal, only looked at the website..i had somethng like it with the old teachertool and x11vnc..karl rungs was a big help and a great guy
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| 21:52 | <andygraybeal> cliebow, nice
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| 22:32 | <cliebow> an
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| 22:33 | andygraybeal, maybe the day is coming i can put the high schools back in ltsp..this macbook 1-to-1 is incrdibly expensive..
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