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


Channel log from 19 September 2012   (all times are UTC)

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06:04
<ltspuser_19>
Hello good people, I need help please. I'm trying to get a couple of old thin clients running on Edu12.4. I have changed the Color depths, cancelled encrypted ssh pretty much everything that the manual suggets. One still goes to the login screen then locks up, while the other doesn't get past the dos like screen, it hangs with the curser just blinking. Is anyone ale to help please. I know they work on an older CentOS ltsp, so I h
06:08
<cyberorg>
ltspuser_19, try XSERVER=vesa
06:11
<ltspuser_19>
ok, will try now, thanks.
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06:21
<mkuzu>
heloo
06:21
A PROBLEM here:
06:21
thing client wibtek
06:22
amd64 configuration works
06:22
but as the machine have intel MGA 3600 on it
06:22
I need to run i386
06:22
MBError =
06:23
Exported device is too big for me. Get 64 bit machine :-(
06:23
:-( included
06:23
any idea
06:23
?
06:23
<ltspuser_19>
It appears that didn't work cyberorg. When I change the fields within the lts.conf file, then save, do I need to do anything else. Because I don't think changes that I make are infact taking effect. I just tested it out by using LDM=AUTOLOGIN-True, but it still had the login screen?
06:25
<cyberorg>
LDM_AUTOLOGIN requires LDM_USERNAME and LDM_PASSWORD set as well
06:26
check the path of lts.conf you are editing, it has to be the one in tftpboot
06:27
<alkisg>
ltspuser_19: you can try with SCREEN_07=shell in lts.conf, you're supposed to get a shell this way. Then, try lspci -nn -k | grep -A 2 VGA to see which graphics card the clients have
06:28
mkuzu: what's the output of this? grep -r '' /etc/nbd-server
06:33
<mkuzu>
Pasting
06:33
.
06:33
.
06:33
.
06:33
/etc/nbd-server/conf.d/ltsp_amd64.conf:[ltsp_amd64]
06:33
/etc/nbd-server/conf.d/ltsp_amd64.conf:exportname = /opt/ltsp/images/amd64.img
06:33
/etc/nbd-server/conf.d/ltsp_amd64.conf:readonly = true
06:33
/etc/nbd-server/conf.d/ltsp_i386.conf:[ltsp_i386]
06:33
/etc/nbd-server/conf.d/ltsp_i386.conf:exportname = /opt/ltsp/images/i386.img
06:33
/etc/nbd-server/conf.d/ltsp_i386.conf:readonly = true
06:33
<alkisg>
!pastebin
06:33
<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.
06:33
<mkuzu>
/etc/nbd-server/config:[generic]
06:34
/etc/nbd-server/config:# If you want to run everything as root rather than the nbd user, you
06:34
/etc/nbd-server/config:# may either say "root" in the two following lines, or remove them
06:34
/etc/nbd-server/config:# altogether. Do not remove the [generic] section, however.
06:34
/etc/nbd-server/config: user = nbd
06:34
/etc/nbd-server/config: group = nbd
06:34
/etc/nbd-server/config: includedir = /etc/nbd-server/conf.d
06:34
/etc/nbd-server/config:
06:34
/etc/nbd-server/config:# What follows are export definitions. You may create as much of them as
06:34
/etc/nbd-server/config:# you want, but the section header has to be unique.
06:34
.
06:34
.
06:34
.
06:34
.
06:34
ok
06:34
http://pastebin.com/CcKu5bjR
06:35
<alkisg>
And the output of this? grep ^append /var/lib/tftpboot/ltsp/*/pxelinux.cfg/default
06:36
<mkuzu>
http://pastebin.com/Jk5MXMnU
06:37
<alkisg>
mkuzu: those look fine, now, did you say you want all clients to boot from amd64, and one client to boot from i386?
06:37
<mkuzu>
well my dhcp configuration
06:37
is for amd64 for all machines
06:37
and
06:37
I have a configuration
06:37
host
06:37
test
06:37
defining the ethernet address of my test client
06:37
all others boot from amd64 cconfig
06:38
and my test i 386
06:39
<alkisg>
On the server: ls -lha /opt/ltsp/images
06:39
On the client busybox: cat /proc/cmdline
06:41
<mkuzu>
pasting here
06:41
drwxr-xr-x 2 root root 4.0K Sep 19 09:07 .
06:41
drwxr-xr-x 5 root root 4.0K Sep 18 22:00 ..
06:41
-rw-r--r-- 1 root root 415M Sep 18 22:17 amd64.img
06:41
-rw-r--r-- 1 root root 282M Sep 19 09:07 i386.img
06:41
that was the server
06:42
copying from the screen
06:43
ro initrd=initrd.img root=/dev/nbd0 init=/sbin/init-ltsp quiet splash plymouth :force-splash vt.handoff=7 nbdroot=:ltsp_i386 BOOT_IMAGE=vmlinuz
06:52
.
06:52
I followed the procedur:
06:52
ltsp-build-client -a i386
06:52
ltsp-build-kernels
06:52
ltsp-build-image -a i386
06:54
<alkisg>
!nbd-client
06:54
<ltsp>
nbd-client: To try mounting the NBD image from the client initramfs: nbd-client 192.168.67.1 -N /opt/ltsp/i386 /dev/nbd0
06:54
<alkisg>
So, from the client busybox:
06:54
nbd-client server-ip -N :ltsp_i386 /dev/nbd0
06:55
This tells you that you need an 64bit machine?
07:06
<ltspuser_19>
alkisg- it returned 00:03.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Rage XL [1002:4752] (rev 27). Subsytem: Compaq Computer Corp Proliant Rage XL [0e11:001e] Kernel modules: atyfb
07:11
<alkisg>
ltspuser_19: that's on the computer that gets to the login screen, or the other that stays at "dos"?
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07:14
<ltspuser_19>
Sorry thats on the server. The one that gets to login locks up about 15 to 20 seconds after loging in. The the one that hangs on DOS stays at "Trying to load: pxelinux.cfg/default"
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07:17
<alkisg>
!quiet-splash
07:17
<ltsp>
quiet-splash: to disable the splash screen in Ubuntu, in order to see any boot error messages, run sudo gedit /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default and remove quiet splash plymouth:force-splash vt.handoff=7
07:17
<alkisg>
That ^ for the "dos" hang
07:19
<cyberorg>
"dos" :)
07:25
<mkuzu>
.
07:25
Yes it tells I need an 64 bit machine
07:25
.
07:37
<ltspuser_19>
alkisg and ltsp- I hope that msg to quiet-spash was for me cos I deleted it and it is still slowly loading, stopping then starting again. It is up to 305.019899 kernel=thread=helper +0x6/0x10
07:38
<alkisg>
ltspuser_19: yes that was for you, how much ram does that client have?
07:38
<ltspuser_19>
64mb
07:39
<alkisg>
It's too little for 12.04
07:39
It needs about 100 mb to boot
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07:41
<ltspuser_19>
I see. so looks like I should throw that away then. as unfortunately the ram is soldered on the MB and is not upgradeable:(
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07:48
<ltspuser_19>
alkisg is there a way I could get this thin client to use a cut down version rather than the full desktop so it can at least boot?
07:51
<alkisg>
ltspuser_19: you can install debian, or remove plymouth from the initramfs
07:51
Or use altlinux... etc etc, generally not worth the trouble
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07:55
<ltspuser_19>
I really like 12.4, actually just downloaded 12.4.1 to use. I was hoping there may be a way to get these old thin's to obtain a cut down version off the server while leaving the better PC's using the normal and better desktop as now I'm accustomed to
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08:25
<alkisg>
No, 12.04 is not proposed for clients with < 128 MB RAM
08:25
You could use 10.04, or debian, or altlinux, or manually patch the 12.04 initramfs yourself
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08:45
<ltspuser_19>
alkisg- is there anywhere I can find a "how to" to manually patch 12.04?
08:45
<alkisg>
No
08:45
/usr/share/initramfs-tools => inside there, you need to read the code etc
08:46
Remove PLYMOUTH from the configuration, update-initramfs -u to regenerate it, etc etc
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08:55
<ltspuser_19>
Righto, you lost me after etc, etc. Looks like I'll take your advice and give debian a go. Even though I had my heart set on 12.4.1. Thanks for all your help
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11:44
<muppis>
!jetpipe
11:44
<ltsp>
Error: "jetpipe" is not a valid command.
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11:51
<mkuzu>
helo
11:51
<muppis>
!learn jetpipe as Jetpipe -script has founded to be unstable in some cases. You can try C written Jetpipe from GitHub https://github.com/bilange/jetpipe or switch it to USB/IP and use these scripts http://pastebin.com/Ltdi2TCL Support AIO devices as well.
11:51
<ltsp>
The operation succeeded.
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11:52
<andygraybeal>
morning
11:53
<mkuzu>
EXT4-fs (nbd0): unable to read superblock
11:54
<ogra_>
muppis, erm., that doesnt even have half the functionality the current jetpipe has, it is based on a years only branch from me ...
11:54
muppis, you should at least note that function is limited in the bot entry
11:55Parker955_Away is now known as Parker955
11:56
<alkisg1>
muppis: did you try it? Does it work?
11:56
<muppis>
alkisg1, just made those to work.
11:56
In production.
11:56
<ogra_>
(there was a large and complete rewrite of my crappy initial code a few years ago)
11:57
<alkisg1>
ogra_: I don't remember if I asked you, is jetpipe just a redirect? I mean, could we use socat instead?
11:57
<ogra_>
would be nice if someone could take the .c code and follow suit so we could replace it without regressions
11:57
<muppis>
!learn jetpipe as Jetpipe -script has founded to be unstable in some cases. You can try C written (but limited) Jetpipe from GitHub https://github.com/bilange/jetpipe or switch it to USB/IP and use these scripts http://pastebin.com/Ltdi2TCL Support AIO devices as well.
11:57
<ltsp>
The operation succeeded.
11:57
<mkuzu>
helo
11:57
alkisg1
11:57
<alkisg1>
Hi mkuzu
11:57
<mkuzu>
I guess you will remember
11:57
<ogra_>
alkisg1, might be, try it :)
11:58
<alkisg1>
muppis: care to try with socat instead? ^
11:58
<ogra_>
i guess you could use a shell script and use > as well :)
11:59
<mkuzu>
Exported device is too big for me. Get 64 bit machine :-(
11:59
<ogra_>
nc -l 1234 > /dev/lp0
11:59
that would work too ;)
11:59
listenin on port 1234
11:59
<mkuzu>
my built client for i386
11:59
gives this when booting
11:59
but amd64 works fine
11:59
<muppis>
alkisg1, what I'm aware, hplip doesn't like from socat.
12:00
<alkisg1>
muppis: why? what does jetpipe.c do more, than just a redirect?
12:00Parker955 is now known as Parker955_Away
12:00
<alkisg1>
Like nc, socat, or just bash <> /dev/tcp?
12:00
<ogra_>
the point isnt the redirect in jetpipe but the pre-processin and handling of different ports and protocols (serial, parallel and usb printers etc)
12:00
<muppis>
Well.. That's why I ended up with USB/IP, beacause jetpipe.c didn't work aswell :D
12:01
<ogra_>
for the redirect *any* way should work
12:01
<alkisg1>
The preprocessing could be handled by a shell script before it decides what params to pass to nc/socat, right?
12:01
<ogra_>
and i bet the nc command above would do fine
12:01
<alkisg1>
But I wonder why muppis reports that it doesn't work...
12:01
<ogra_>
alkisg1, exactly what i mean
12:02
doesnt patetr what lang it is in ... in the end its some pre-prosessing for different target devices and a simple redirect
12:02
s/patetr/matter/
12:02
tsk
12:02
<alkisg1>
But why would that not work? muppis says it doesn't work in python, it doesn't work in C, etc...
12:03
<ogra_>
dunno, most likely not jetpipes fault per-se
12:03
<alkisg1>
And others reported printers hanging with jetpipe
12:03
<ogra_>
device setup, premissions etc
12:03
probably udev-acl doesnt dtrt
12:03
<alkisg1>
Usually it works for a while, then hangs
12:03
<ogra_>
ram :)
12:03
<alkisg1>
muppis: could it be a problem with little ram on the client?
12:03
<muppis>
Well. Customer is using 10.04, so there can be a bug in script. There's HP Laserjet P2015 connected to client and with jetpipe worked fine a while, but then jetpipe just died and after client reboot cups died.
12:04
<ogra_>
i would put my bets on RAM
12:04
especially since cups dies as well
12:04
<muppis>
Looks like it got 512 RAM.
12:05
<ogra_>
well, you should set up some RAM monitoring and check what happens when jetpipe dies
12:05
do you use nbd swap ?
12:05
<muppis>
Nope.
12:06
<mkuzu>
...
12:06
Now my question is:
12:06
I have the LTS on 64 bit kernel
12:06
and I am building clients for i386 arch
12:07
does that yield to a problem
12:07
because the initrd img file
12:07
I get this way
12:07
cannot be used
12:07
during boot
12:07
the thin client displays
12:07
<ogra_>
could you try typing whole lines before hitting enter ... it is very hard to read this way
12:07
<mkuzu>
Exported device is too big for me. Get 64 bit machine :-(
12:07
<muppis>
ogra_, was in plans to make them use local swap. For due licensing and agreements HDD's are left in can could be used as swaps.
12:08
<mkuzu>
Sorry
12:09
<ogra_>
muppis, well, theoretically there is nothing in jetpipe that could cause a hang in itself so i would guess its the amount of data that gets cached or some such
12:09
might be that you hit an ulimit of the kernel too ....
12:10
and jetpipe has no logic to ask for a raise of any ulimits
12:10
<muppis>
ogra_, possible. But not having any resources to study more in this case, sorry.
12:10
<ogra_>
either f these might be your prob
12:10
alkisg1, did you already try anything with your zatab ?
12:11
apart from running it as is :)
12:11
<alkisg1>
ogra_: I tried plugging the power adapter to a pc power cord, because its american socket wouldn't fit here
12:11
It worked :P
12:11
<ogra_>
haha
12:11
i have adapters for that :)
12:11
<alkisg1>
Other than that, nah, no time yet to play
12:12
<ogra_>
k
12:12* ogra_ just clones the kernel tree ...
12:12
<ogra_>
since hours ....
12:12
<alkisg1>
In a month or so we'll finish with the many ltsp installations (new school year start now), and I'll have more time for it
12:12
<ogra_>
in a month we should have a working image already :)
12:13
seems zareason did ubuntu installs themselves already ... there are youtube videos in tehri company channel ...
12:13
i wonder why they didnt publish images
12:13
<alkisg1>
Aaah nice. Yeah I looked at the android stuff and I didn't know what to do with it, it was just like my phone
12:13
With ubuntu in it it'll be much more useful
12:14
<ogra_>
well, not sure
12:14
<alkisg1>
(actually I have a newer cyanogen mod in my phone, so it was even a bit of disappointement :D)
12:14
<ogra_>
i have no idea how well tablet support is in the toolkits etc
12:16
<alkisg1>
That's why they're giving them to us, though, right?
12:16
Report bugs, maybe send some patch..
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12:46
<markit>
hi alkisg :) I'm at work now, no time to chat... just wondering if the drop of NFS in favour of sshfs in 12.04 setup is still your choice or problems surfaces recently
12:46
(so I update my italian doc tonight on the subject)
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14:12
<thebwt>
so we're trying to install a custom software service, condor, to run on the ltsp clients. But I think I'm probably doing something wrong. It seems like access to non logged in users is complicated.
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14:29
<thebwt>
obviously sudo service condor start wont work, but we thought it would autostart.
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14:58
<Hyperbyte>
thebwt, I believe you can set programs to autostart using the update-rc.d command in Ubuntu. If you execute this in the ltsp-chroot, update the chroot and then reboot the clients, this might do it
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15:05
<thebwt>
Hyperbyte: thats what we thought, but somewhere in the ltsp magic I get the feeling that the local rc.d is ignored or something
15:06
<Hyperbyte>
I don't believe so. Most of the LTSP stuff is done before rc.d
15:07
And I know for a fact I've enabled services during boot on LTSP via rc.d
15:07
I would try this:
15:07
!screen_02
15:07
<ltsp>
screen_02: To get a root shell on an Ubuntu thin client: https://help.ubuntu.com/community/UbuntuLTSP/ClientTroubleshooting#Using_a_shell_SCREEN
15:07
<Hyperbyte>
Start the service there, see what happens.
15:07
Maybe it starts, but with errors
15:07
You can also do
15:07
!quiet-splash
15:07
<ltsp>
quiet-splash: to disable the splash screen in Ubuntu, in order to see any boot error messages, run sudo gedit /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default and remove quiet splash plymouth:force-splash vt.handoff=7
15:07
<Hyperbyte>
So you can see boot messages
15:08
<thebwt>
roger that
15:08
<Hyperbyte>
Should give you some more info on what's happening.
15:08
If you're wondering if rc.d works, you could also try something simple, like enabling sshd via rc.d, see if that boots.
15:08
But I'm 99% sure that'll just work like advertised.
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15:14
<thebwt>
okay so the user that starts the service doesn't exist, is there a way to autoload certain users?
15:14
I realize that not all our ldap users get loaded, only the current one needed
15:15
so I guess I need to force load the user needed?
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16:47
<andygraybeal>
does anyone know of a thin client that has multiple serial ports? the old 9 pin rs232?
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16:59
<||cw>
andygraybeal: an actually embedded one? not off hand. the ebox 3300/4500 JSK models have 2 ports though
17:00
<andygraybeal>
okay thank you; two ports, i'll have a look!
17:01
i've never heard of ebox before
17:02
<||cw>
this is the one I use most http://www.wdlsystems.com/modperl/view_services.cgi?r=detail&prod_num=1EBX43K&aisle_id=1043
17:02
<andygraybeal>
are they fanless?
17:02
<||cw>
yes
17:02
and VESA 100mm mountable without an extra bracket
17:03
I have some sandwiched between a monitor arm and a 19" touchscreen
17:03
<andygraybeal>
nice :)
17:03
<||cw>
you have to find your own screws to do that though
17:04
love the form factor, wish they were either faster or cheaper though
17:05
<andygraybeal>
i found one with 4 rs232 ports :)
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17:52
<thebwt>
I have a service that's configured in rc*.d, but it wont start because it cannot find the user it needs. It has a custom user that we made in our ldap setup, but the user isn't loaded. Is there a way to fix this? I see users like www-data work so this is doable.
18:09
<alkisg>
thebwt: add the user manually in the chroot?
18:09
What does it need the user for?
18:19
<thebwt>
to start the service, it gives an error if the user 'condor' doesn't exist
18:19
I assume the process wants to run as that suer
18:20
<alkisg>
You can either add that user in the chroot, or make a wrapper script that adds the user before starting the service, whichever you find easier
18:25
<thebwt>
roger that
18:26
so how does the system decide what users to bring in from the host? It seems to know to include the user that logs in, but it doesn't try anyone else? We use ldap, so it was really nice that it just worked off the host system's configuration.
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18:28
<||cw>
thebwt: it brings in zero users
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18:28
<||cw>
thick client do fudge in the user that logs in, but it's temporary
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18:57
<thebwt>
gotcha ||cw, that's probably the biggest funny thing going on then.
18:57
I guess I should rpeface everything I say with "I'm using thick clienting"
18:57
preface*
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19:14
<blakes>
Wow did I have a disaster today! We had two labs (about 50 thin clients) connect almost simultaneously, and print their writing assignments. The server just couldn't handle the load and cups crashed constantly! I have a quad processor server (4 dual core AMD). any suggestions?
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19:16
<blakes>
Was thinking of creating a separate print server box and get printing off the LTSP server.??
19:18
<||cw>
blakes: crashed? not just out of ram?
19:18
personally, I'd have a dedicated print server for 50 clients, and especially if it's all cups and not raw
19:20
<blakes>
So how does the setup go if you aren't running cups on the ltsp Server... does every user need access to add a printer?
19:21
Adding a bit of training to show kids how to add printers... errgh! What about putting a config in the image and or something in skel?
19:24
maybe ram... I have 16GB installed and 1GB on most clients.
19:25
<||cw>
well, if you point the ltsp hosts cups to the print servers cups, the processor is minimal on ltsp as it just has to http the job over, and the print server does all the ppd to raw formating
19:25
<blakes>
ah... that shouldn't be too tough
19:26
you think 16 Gb is enough for say 55 clients
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19:53
<Mip>
Hey Gang - going to work on updating the client image on my 12.04.1 install of ltsp. Last time we did this, the kernel images disappeared from /opt/ltsp/i386/boot
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20:40
<Mip>
Hey Gang - the kernel and image updates went well. No loss of boot images for clients. Not sure why this broke last time, but it's working now. Thanks
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22:32
<vagrantc>
alkisg_work: the udev rules you needed changed were for ltsp packaging?
22:38
alkisg_work: pushed.
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