IRC chat logs for #ltsp on irc.freenode.net (webchat)


Channel log from 14 May 2015   (all times are UTC)

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05:02work_alkisg is now known as alkisg
05:02
<alkisg>
dtcrshr: internet browsing == a normal PC, it's not like it needs less CPU or RAM with that
05:03
So buy whatever normal clients you want, with the only difference that they can be diskless
05:03
E.g. core i3 with 4 GB RAM
05:03
One of them can then serve as your LTSP server
05:03
(LTSP diskless fat clients)
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06:20* alkisg successfully booted UEFI clients using http://mg.debian.net/debian/dists/stable/main/installer-amd64/current/images/netboot/debian-installer/amd64/bootnetx64.efi
06:20
<alkisg>
It's not very clean because many involved programs had bugs, so I had to improvise...
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06:28
<alkisg>
Dnsmasq doesn't properly support proxyDHCP mode for UEFI,
06:29
iPXE can't load bzImages so it can't load a 32bit kernel on a 64bit client, and also it doesn't support all NICs, and doesn't seem to be able to reuse the UEFI PXE stack well,
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06:29
<alkisg>
syslinux.efi works fine with 64bit kernel and client, but hangs with 32bit kernel on 64bit client,
06:29
...and finally grub works fine,
06:29
but since dnsmasq/ proxyDHCP
06:30
...doesn't work well, a duplicate IP is needed on the DHCP server...
06:30
At least it's working fine, even if it's a bit messy. :)
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08:30
<flydragon>
dhcp.conf amd64 and i386 together? How do I have to setup a "dual" configuration?
08:32
Hello?
08:39
<work_alkisg>
Boot amd64 clients with i386 chroot :)
08:39
i386 chroots support up to 64GB RAM
08:42
<flydragon>
Thank you for the answer. So I can boot mei i386 machines and amd64 machines? Is there no differnce in performance?
08:44
<work_alkisg>
Not noticeable, no
08:45
<flydragon>
Great, thank you. I'll try it
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08:54
<andyc>
Hi - is anyone able to help me. in kiosk ltsp - i want to run 2 options.. e.g. /usr/bin/firefox --option1 --option2 .. if i put more than 1 option in my lts.conf file it fails to run because it's trying to run the 2nd option as a command. i believe it can be fixed in here but i don't know what to do :( http://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/view/head:/client/share/ltsp/screen.d/kiosk
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09:25
<andyc>
no one here?
09:38work_alkisg is now known as alkisg
09:39
<alkisg>
andyc, did you try "--option1 --option2" ?
09:39
Or try KIOSK_OPTIONS="option1 option2"
09:40
<andyc>
hi
09:40
<alkisg>
Hello
09:41
<andyc>
yes in Kiosk_options in lts.conf i tried KIOSK_OPTIONS="--kiosk --no-first-run" also any combination..
09:41
if i use just one command it works, if i use 2 or more it fails to boot
09:41
try without -- ?
09:42
and thanks
09:42
trying now in a vm. will let you know in 20seconds.
09:43
same - it hangs -- spamming this downt he screen "-su : --kiosk: command not found"
09:44
note, i'm on ubuntu, and originally no options worked at all - so i had to manually add this fix https://bazaar.launchpad.net/~ltsp-upstream/ltsp/ltsp-trunk/revision/2571
09:45
<alkisg>
andyc, what's your lts.conf like, now?
09:46
!pastebin
09:46
<ltsp`>
pastebin: the LTSP pastebin is at http://ltsp.pastebin.com. Please paste all text longer than a line or two to the pastebin, as it helps to reduce traffic in the channel. Don't forget to paste the URL of the text here.
09:47
<andyc>
http://pastebin.com/evYpYufW
09:47
the last one was without "--"
09:48
<alkisg>
LDM_DIRECTX only takes effect after login, which you don't do with kiosk
09:48
<andyc>
ok, i will remove that.
09:48
thanks for the tip
09:49
<alkisg>
andyc: the problem is in the line of the patch
09:49
Both lines are wrong, the old and the new
09:49
Let me send you the correct one...
09:49
<andyc>
<3
09:50
<alkisg>
su - "$KIOSKUSER" -c "XINITRC_DAEMON='$XINITRC_DAEMON' KIOSK_WM='$KIOSK_WM' KIOSK_OPTIONS='$KIOSK_OPTIONS' xinit '$xinitrc' /usr/share/ltsp/kioskSession '$KIOSK_EXE' -- '$DISPLAY' vt'${TTY}' ${X_ARGS} -br" >/dev/null
09:50
Try that one
09:50
If it works, file a bug report so that we can commit it upstream
09:50
!ltsp-bug
09:50
<ltsp`>
ltsp-bug: To file a bug report for upstream LTSP, go to https://bugs.launchpad.net/ltsp
09:51
<alkisg>
...or comment on https://bugs.debian.org/743867
09:51
<andyc>
thank you very much.. testing now
09:54
<alkisg>
With the old code, it would work if you'd escape slashes, like this:
09:54
KIOSK_OPTIONS="option1\\ option2"
09:54
*escape spaces with slashes
09:54
<andyc>
with or without patch?
09:54
<alkisg>
With the patch
09:55
<andyc>
should i try it without first
09:55
ok..
09:55
building now
09:55
<alkisg>
So, 3 versions of the code:
09:55
initial => broken
09:55
vagrantc's code => works if you escape spaces
09:55
mine => works without escaping
09:56
<andyc>
if this works... i'll kiss you. If you have some paypal address i will send you 30$, i know it's not much
09:57
<alkisg>
Haha, sure, thanks it's always welcome, alkisg@gmail.com - I'll even commit it upstream for you :D
10:01
<andyc>
should i still put "--" :D -- It runs with no options and puts "no-first-run%20kiosk" as the home page. i think user error on my part :) building again
10:02
oops, dont need to build.. testing
10:04
<alkisg>
The "--" in vagrantc's code is needed, don't remove it, but don't put "--" in your lts.conf options
10:05
<andyc>
nearly... starts up but no options work .. my options in kiosk are ------- KIOSK_OPTIONS="--no-first-run\\ --kiosk"
10:05
is that correct?
10:05
ltf.conf*
10:05
ok
10:06
if i don't put -- it opens chome at this home page "no-first-run%20kiosk
10:06
chrome*
10:07
if i put -- no options work. i will double check the edit i made
10:08
<alkisg>
Let me see if anything more is needed...
10:10
Meh again a stupid ubuntu .diff in the kiosk plugin...
10:10
<andyc>
i edited correct. Ok no rush. Appreciate the help.
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10:13
<alkisg>
andyc, which version of the code does the client have now? vagrantc's?
10:14
<andyc>
i used this http://ternarybit.org/chrome-web-kiosk-guide/
10:14
ubuntu 14.04.2 did all updates
10:15
fresh install
10:15
<alkisg>
andyc, to make it faster, can you share your screen with me?
10:15
!vnc-dide
10:15
<ltsp`>
vnc-dide: To share your screen with me, run this: sudo apt-get --yes install x11vnc; x11vnc -connect srv1-dide.ioa.sch.gr - this is a reverse connection, it doesn't need port forwarding etc.
10:17
<alkisg>
E.g. you might be missing a kioskSession etc update, and it's easier for me to locate it that way
10:17
<andyc>
done.. it's in a vm
10:17
is it working?
10:18
<alkisg>
No
10:18
Do you have a graphical environment on the server, i.e. xorg running?
10:18
<andyc>
no
10:18
<alkisg>
Ah that won't work then
10:19
!screen-socat
10:19
<ltsp`>
Error: "screen-socat" is not a valid command.
10:19
<alkisg>
!socat
10:19
<ltsp`>
socat: One way to share a console with a remote person is: [local pc] forward port 5500; apt-get install socat; socat tcp-listen:5500,keepalive=1 stdio,raw,echo=0 [remote pc] apt-get install socat screen; socat SYSTEM:"sleep 1; exec screen -xRR ra",pty,stderr tcp:REMOTE-IP:5500 & screen -l -S ra
10:19
<alkisg>
Give me a moment
10:19
<andyc>
i can forward a port if needed
10:19
<alkisg>
No, no need
10:19
<andyc>
will take 1 sec
10:19
ok
10:19
or.. i can use teamviewer
10:20
<alkisg>
Run this: apt-get install socat screen; socat SYSTEM:"sleep 1; exec screen -xRR ra",pty,stderr tcp:srv1-dide.ioa.sch.gr:5501 & screen -l -S ra
10:20
teamviewer without xorg?
10:20
<andyc>
ok
10:20
it's in a VM, i'm on windows
10:20
<alkisg>
Ah
10:20
No socat is fine, fast etc
10:22
<andyc>
did it work?
10:22
<alkisg>
Btw that's a good guide, but the person writing it should have filed bug reports instead of saying "edit this and that"
10:22
No it didn't work...
10:22
OK teamviewer... :)
10:23
<andyc>
i'll send you numbers in email
10:23
<alkisg>
No, wait
10:23
<andyc>
ok
10:23
<alkisg>
Did you see the other tab with the private chat window?
10:23
OK give me a sec to install teamviewer...
10:29
andyc, do you want to delete amd64?
10:29
<andyc>
can do, not bothered. never use
10:29
<alkisg>
OK
10:33
andyc: what happens if you boot the client with this lts.conf?
10:33
I.e. without the \\
10:33
<andyc>
will try.. dont think i tried with your change..
10:33
watch
10:34
<alkisg>
ok
10:34
<andyc>
maybe will work with your change....
10:35
:)
10:35
<alkisg>
:)
10:35
The \\ were needed before my code fix
10:35
Since you put the code fix, the \\ did harm...
10:35
<andyc>
thanks.. i'll leave like this or put back and use \\ ?
10:36
<alkisg>
Leave it like this and file a bug report mentioning 2 things,
10:36
<andyc>
there was a diff with ubuntu i had to put in
10:36
awesome thanks for help
10:36
<alkisg>
one, my fixed line, and two, the other fixes you needed to apply from the blog post
10:36
!ltsp-bug
10:36
<ltsp`>
ltsp-bug: To file a bug report for upstream LTSP, go to https://bugs.launchpad.net/ltsp
10:36
<andyc>
sedning 40$
10:36
<alkisg>
I.e. the "*chrom*" in the kiosk script
10:36
Thanks andyc :)
10:37
<andyc>
you in germany?
10:38
<alkisg>
Nope, in Greece, Ioannina
10:38
<andyc>
ok, will send 35 euros?
10:38
i'm in UK, just assumed dollars :)
10:39
<alkisg>
andyc, I don't mind pounds, maybe I'll sometime need to buy things from amazon.co.uk :D
10:39
<andyc>
sent
10:39
<alkisg>
Ty :)
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11:10
<tec_>
hello
11:12
the server restarted and lost the connection with customers, when I open epoptes customers are not visible. What is the way to reestablish the connection without restarting the clients.
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13:36
<gp>
So I've been working on getting ltsp-pnp working the same for fat clients and thin clients. the linux desktop is great. I'm having problems with the xfreerdp screen. On the thin client, everything works fine, but if I enable sound on the fat client I keep getting freerdp crashes. Is there any way to see the crash error message? I've tried all of the command line fixes I could find recommended on the internet but I am having
13:36
trouble since I cant see the error message
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13:41
<alkisg>
gp, run xfreerdp from an xterm
13:42
E.g. SCREEN_07=xterm
13:42
<gp>
ty
13:43
<ltsp_fan>
hi, thanks for the help: following on advice from before, I switched to Edubuntu 12.04, because I was told the newer kernels don't support my via motherboard. Booting up of clients now work without the greeninsh screen of before. My last problem is getting audio to work :(
13:43
one of my clients has an intel motherboard and everything works
13:43
<alkisg>
gp: maybe the problem is that xfreerdp tries to use alsa directly while the session uses pulseaudio, so maybe you need to run `padsp xfreerdp params`
13:44
<ltsp_fan>
the rest (7 clients) have a via motherboard and everything works except audio
13:44
here is the lspci
13:44
<alkisg>
ltsp_fan: do you know of any linux or kernel version that supports your hardware?
13:44
LTSP users aren't really hardware specialists, #ubuntu-kernel might help more
13:44
<gp>
alkisg: I will try that. I attempted to specify that freerdp use pulse via the command line but that may be a better option
13:44
<alkisg>
If you do find the kernel you want, then it's easy to put that to ltsp
13:45
<ltsp_fan>
00:11.5 Multimedia audio controller: VIA Technologies, Inc. VT8233/A/8235/8237 AC97 Audio Controller (rev 60)
13:48
alkisg: thanks for helping again :), last time you were able to provide a fix for a network card problem, I was hoping to troubleshoot this audio problem?
13:49
<alkisg>
ltsp_fan: it helps if you use the same username
13:49
Now you're just an unknown guy without history here :)
13:49
<ltsp_fan>
i did : ltsp_fan
13:49
<alkisg>
If the kernel doesn't see the card, use a different kernel
13:49
<ltsp_fan>
kernel does see the card, I think
13:49
<alkisg>
Google or ask in #ubuntu-kernel to find out which kernel supports your hardware
13:49
<ltsp_fan>
lsmod
13:50
<alkisg>
Run these:
13:50
ltsp-localapps xterm
13:50
aplay /bin/ls
13:50
If you get sound, the kernel sees the card, otherwise not
13:50
<ltsp_fan>
snd snd_via 82xx
13:50
<alkisg>
I don't mean just that it's shown in lspci, it has to work too
13:50
We can't debug kernel modules problems here
13:50
<ltsp_fan>
sure, let me try that
13:53
<gp>
If you aren't sure what version of the distro will support your hardware why not try a livecd or something like that on the hardware instead of adding ltsp into the mix?
13:57
alkisg: Is SCREEN_05="xterm" not the correct way to open an xterm screen?
13:57
<alkisg>
(04:42:33 μμ) alkisg: E.g. SCREEN_07=xterm
13:57
05, 07 whatever
13:58
<gp>
I am getting an X.Org screen text load out and then it reboots.
13:59
<alkisg>
pastebin your current lts.conf
13:59
<gp>
maybe it is a color depth issue. i had to force color depth
13:59
okay one sec
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14:03
<gp>
alkisg: http://dpaste.com/0E443FF
14:03
<alkisg>
CONFIGURE_X? why?
14:04
You can run "mkdir -p dir1 dir2 dir3", no need for multiple mkdirs
14:04
<gp>
Thought it was required for the X options I was setting. Ill remove it
14:04
<alkisg>
You can't have 2 ldm screens, it'll cause issues
14:05
like=default is not needed, the default section always applies
14:06
And, instead of X_COLOR_DEPTH=24, put X_SMART_COLOR_DEPTH=False
14:06
Nevertheless, if it was working with xfreerdp, I don't see why it wouldn't work with xterm
14:07
<gp>
I will make the changes and try agian
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14:10
<alkisg>
!learn alkisg-todo as overlayfs with workdir: https://lists.linuxcontainers.org/pipermail/lxc-devel/2014-October/010686.html
14:10
<ltsp`>
The operation succeeded.
14:22
<ltsp_fan>
okay so there's no sound when I use localapps
14:23
i suppose I should use a live cd and test or play around with sound settings?
14:23
<alkisg>
Yup, not ltsp related until you can hear sound from a live cd/usb
14:23alkisg is now known as work_alkisg
14:23
<ltsp_fan>
thanks
14:24
i hope to come back for more ltsp help another time :)
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14:26
<gp>
Hrm, no idea what is going on with loading xterm. /var/log/Xorg.7.log appers to have no errors but it keeps ending with "Server terminated successfully (0). Closing log file."
14:27
oh
14:27
xterm isn't installed on the client for some reason. going to rebuild my image. doh
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14:47
<gp>
Would you consider it a bad practice to leave the shell and xterm screens available on the client?
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14:51
<gp>
alkisg: btw thanks for the xterm screen script tip. i was able to get the error messages from xfreerdp
15:02
<Hyperbyte>
gp, in practice, probably not... in theory, it's a massive security hole.
15:02
Allows you to poke around on the filesystem of the client, finding any relevant data that might be in the configs... passwords even maybe... and you could always install a keylogger of sorts of course.
15:03
<gp>
ah yeah i was thinking the clients couldn't do much since they were sort of read only but i guess they could in between boots
15:04
<Hyperbyte>
I think you'll find many people don't shut down their clients when they are supposed to. :P
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16:09
<dilophosaur1>
Hey All,
16:10
I followed the steps outlined here https://wiki.debian.org/LTSP/Howto except for the dhcp portion, which I pushed off to an existing dhcp server
16:12
My pxe clients find the server, try to load pxelinux.0, but I'm getting the error chroot: cant execute 'test': Exec format error. mount: device or resource busy.
16:19
More interesting stuff. In syslog on the server side, there are authenticated mount and umount requests that correlate with the errors on the client. It looks like it's showing the request from the client's ip address, but a different port on each attempt.
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16:28
<cliebow>
!seen sbalneav
16:28
<ltsp`>
sbalneav was last seen in #ltsp 22 weeks, 2 days, 18 hours, 15 minutes, and 29 seconds ago: <sbalneav> If we have the "ltsp" user, that would tie in nicely with what I'm trying to accomplish, IF we don't feel that's a security risk.
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18:08
<gbaman>
alkisg: is it possible to create a USB drive that points to the LTSP pxe server?
18:08
Have a setup where the venue already has a pxe server on the network
18:15
<alkisg>
gbaman: you can configure multiple pxe servers
18:15
<gbaman>
Oh?
18:15
<alkisg>
If you do have control over them
18:15
<gbaman>
Nope
18:16
<alkisg>
Then use an ipxe boot script
18:16
Put it in a usb stick and tell it where to boot from
18:16
It's not a "pxe server" then, it's just a series of boot commands
18:16
dhcp net0; set next-server=1.2.3.4; set filename=xxx; boot
18:16
Stuff like that
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20:28
<gp>
So does it make any sense that xfreerdp would have issues with sound when using a screen script as root but not when logged into ldm via a terminal on the desktop?
20:29
Refreshing my gmail inbox causes xfreerdp to crash back to the commandline when run via the XTERM or XFREERDP Screen script in lts.conf. But if I log into ldm and open a terminal to start xfreerdp using the same command line there is no problem
20:44
This is in reference to a fat client btw. Thin clients do not seem to have this issue
20:47
The errors shown in XTERM indicate it is a sound problem. "pulse entry returns error. ALSA lib pcm_dmix.c:1022:(snd_pcm_dmix_open) unable to open slave/ assertion `pcm' failed
20:50
maybe sound devices aren't set up automatically for fat client's screen scripts and that is my problem?
20:56
speaker-test fails with a similar error on the fat client xterm
20:58
thats my problem!
20:59
pulseaudio -D before running the xfreerdp command at the fat client SCREEN_05=xterm fixes the problem
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21:06
<gp>
So does anyone have any comments about the best way to get pulseaudio running before starting the xfreerdp screen script?
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21:45
<gp>
I guess the simplest would be to prepend "pulseaudio --start ; " to the $COMMAND in /usr/share/ltsp/screen.d/xfreerdp?
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