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


Channel log from 23 October 2010   (all times are UTC)

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03:16
<alkisg>
!learn gnome-wm as The default window manager in gnome is gnome-wm, which automatically chooses compiz if it thinks that the card supports it, or metacity otherwise. Compiz causes problems to some clients, so forcing it to metacity can solve login problems.
03:16
<ltspbot`>
alkisg: The operation succeeded.
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04:55
<alkisg>
!xauthority
04:55
<ltspbot`>
alkisg: "xauthority" :: to access the client X session from a local root shell, try: eval $(tr '\0' '\n' < /proc/$(pidof -s ldm gdm-simple-greeter gnome-session | cut -d' ' -f1)/environ | egrep '^DISPLAY=|^XAUTHORITY=') && export DISPLAY XAUTHORITY
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09:17
<Ghidorah>
Good morning everyone.
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10:48
<salomon_>
Hello, I' having problems with one ltsp client, sometimes it shows a messages saying "task blocked for more than 120 seconds" when started, other times is does not, but it freezes when lt's loading the desktop, the server has Lenny with xfce
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12:19
<berny6969>
hi
12:20
anyone knows how to create usb pen for boot form wireless to ltsp edubuntu? i search in the wikibut dont view nothing,thanks
12:22
<alkisg>
You need to put the wireless drivers to the initramfs, then copy the whole kernel to the usb stick etc. It isn't a trivial task.
12:25
<berny6969>
is trivial task for me Xd,
12:25
thanks for your message
12:26
<alkisg>
Here's how to add the modules: https://help.ubuntu.com/community/UbuntuLTSP/AddingModules
12:26
Then you need to copy the kernel to the stick + pass an "nbdroot=server:ip" parameter to it
12:26
<berny6969>
its the first time for install ltsp and i dont know
12:27
the kernel image its i386.img?
12:27
on /opt/ltsp ?
12:27
<alkisg>
No, it's on /var/lib/tftpboot/ltsp/i386/vmlinuz
12:27
and initrd.img there
12:28
<berny6969>
wireless performance its good?
12:29
<alkisg>
No, it's barely enough for 1 client
12:30
<berny6969>
i want to connect 20 o 30 netbooks form wireless,its impossiblr to work?
12:31
<alkisg>
With the current ltsp code, yes, because it uses X windows, so each client needs about 10-50mbps
12:31
So with a wireless connection of 50mbps, you could only serve 1-2 clients.
12:32
<berny6969>
its more easy to connect to edubuntu server with vnc or rdp? ltsp support rdp?
12:32
sorry for basic questions XD
12:34
<alkisg>
vnc, neatx, freenx etc, sure you can connect with that
12:35
But 30 netbooks on a single wireless connection will suck no matter how you do it :)
12:35
<berny6969>
i use buffalo routers wifi N 300mpbs,and each router its connect to others with cable
12:35
in total 6 routers wifi n
12:36
but if client connect form vnc,italc cant control this connection no?
12:37
<alkisg>
neatx or freenx are easier to handle and need less bandwidth than vnc
12:37
You could make italc work with neatx sessions... maybe they even work out of the box, I don't know
12:38
<berny6969>
thanks alkisg !!!!
12:38
<alkisg>
np, good luck with that :)
12:39
<berny6969>
XD
12:40
I will try to put 30 ethernet cable on the classroom XDDD
12:42
<alkisg>
What I want to do in the future is write the whole ltsp image to 30 sticks, and boot them as fat clients
12:42
So I'll get centralized authentication + NFS homes + iTalc-like class administration tool with very low bandwidth, so that it can work with wireless too.
12:44
<berny6969>
this netbooks have windows xp / linux
12:44
its a spanish college and one student have one netbook free
12:45
its more easy boot on linux partition and connect to neatx etc
12:45
<alkisg>
Yes, but much slower over wireless. You won't be able to even watch youtube this way.
12:46
If they already have linux, why do you want to netboot them?
12:46
Why don't you just setup ldap + nfs or something similar?
12:46
<berny6969>
i know,but teachers knows ltsp and want to use
12:48
for me,only mount ltsp netbook on informatic classroom
12:48
and connect netbooks with italc client and use nfs for network folders
12:49
and the other problem is linux distribution for this netbooks,its a special made for catalan govern of spain
12:49
its very poor
12:50
its opensuse based
12:55
opensuse use kiwi-ltsp,its a diferent version?
12:57
<alkisg>
kiwi-ltsp uses ltsp but it's somewhat different because of the kiwi integration
12:59
<berny6969>
ok,thanks for all !!!!
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15:22
<DraZoro>
I get an error message while trying to build clients offline check here for error message http://paste.ubuntu.com/518902/
15:27
Any ideas or tips ^^^
15:34
<mherweg>
try:
15:34
chroot /opt/ltsp/i386 umount /proc
15:34
sudo chroot /opt/ltsp/i386 umount /proc
15:35
<DraZoro>
mherweg : Hi.... I am trying right away
15:37
mherweg : Should I create the i386 directory under /opt/ltsp ?
15:38
<mherweg>
you dont have one ?
15:38
yes. try that
15:39
<DraZoro>
mherweg : It was there but ltsp-build-client was complaining about so I removed and tried again. Hence ending up with an error above .
15:39
mherweg : The system refuse to umount ....
15:40
<mherweg>
if the directory wasnt there, then thers nothing to umount
15:41
<DraZoro>
ok
15:41
<mherweg>
which linux version ?
15:41
<DraZoro>
Ubuntu 10.10
15:41
<mherweg>
i did not try that so far
15:42
<DraZoro>
I performed the command on Ubuntu 9.10 and it worked like a charm
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15:42
<DraZoro>
mherweg : But you gave me something to work with ..
15:42
<mherweg>
ltsp-build-client creates /opt/ltsp/i386
15:42
<DraZoro>
Yes I does
15:42
*it
15:44
<mherweg>
this works here on 9.04:
15:44
root@lenovo:/opt# chroot /opt/ltsp/i386 mount -t proc proc /proc
15:44
root@lenovo:/opt# chroot /opt/ltsp/i386 umount /proc
15:46
<DraZoro>
mherweg : Are using the ltsp-build-client with --mirror option ?
15:46
<mherweg>
no. but i doubt that ther's a connection to that error message that you did get
15:47
<alkisg>
DraZoro: when it fails, what do you have in /opt/ltsp/i386? An initial chroot? Or an empty directory?
15:47
<DraZoro>
Yes a lot
15:48
alksig : It is empty
15:48
alkisg : It is empty
15:49
<alkisg>
DraZoro: then maybe it's a problem with debootstrap
15:49
Are you sure that exact line worked in 9.10?
15:49
<DraZoro>
alkisg : Yes I even re-installed 9.10 to double check
15:50* DraZoro is doing something wrong some where
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15:50* DraZoro checks man ltsp-build-client once again
15:50
<alkisg>
Is the server i386?
15:50
<DraZoro>
alkisg : Yes
15:51
<alkisg>
And /opt/ltsp/i386 is completely empty? No etc directory?
15:51
<DraZoro>
alkisg: Nothing
15:54
I have mounted the iso image ....under /media/disk ....maybe this might help http://paste.ubuntu.com/518913/
15:56
The problem lies on this line "W: Failure trying to run: chroot /opt/ltsp/i386 mount -t proc proc /proc "
15:56
Because I fail to run chroot even manually
15:57
mherweg : If I can run the command you gave above the problem might go away.
15:57
<alkisg>
Hmm... and it was working in 9.10 if you specified the loop-mounted cdrom directory, instead of the directory where the packages are?
15:57
(=some subdirectory within the cdrom)
15:57
<DraZoro>
alkisg : Let me try that
15:59
When I put /dev/sr0 as mirror I get "E: Failed getting release file file:///dev/sr0/dists/maverick/Release"
16:00
<alkisg>
No I meant /media/disk/<subdir>
16:01
But ok, maybe it autodetects the path. That's the alternate cdrom, right?
16:01
<DraZoro>
alkisg : My bad ...I wonder which sub directory I will select
16:02
alkisg : Not alternate cdrom ....I used alternate cd for 9.10
16:02
<alkisg>
:)
16:02
<DraZoro>
Now I see the difference
16:02
<alkisg>
Then that's your problem, the packages aren't there on the desktop .iso
16:02* DraZoro kicks himself
16:02
<alkisg>
You need the alternate cdrom as a source
16:02
debootstrap should produce some warning though...
16:02
<DraZoro>
alkisg : I was not away ...I am relieved now
16:03
Guys sorry for all the trouble.
16:03
<alkisg>
np, nice to know that this mirror thing is working with the alternate cdrom :)
16:04
Can be handy for other installatinos
16:04
<DraZoro>
alkisg : I works 100%
16:04
*it
16:05* DraZoro will conduct more research on LTSP mechanism just after exams.
16:05
<DraZoro>
I love this project very much ...LTSP :)
16:05* alkisg too
16:06
<DraZoro>
I love the idea of installing LTSP while installing ubuntu via alternative cd ...
16:07* alkisg prefers installing from the desktop .iso nowadays
16:07
<DraZoro>
Boot alternative cd and press F4 then select LTSP ...
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16:10
<DraZoro>
Ok guys let me go back to work ...thanks a lot alkisg and mherweg
16:10
<alkisg>
bb
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20:18
<salomon_>
Hi, does anyone know how to aplly the patch to disabel nbd-proxy? http://launchpadlibrarian.net/49591679/disable-nbd-proxy.patch
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21:07
<salomon_>
My problem is that one of the clients hangs when loading the desktop, the server is Debian Lenny with XFCE
21:57
<vagrantc>
nbd proxy isn't used on debian at all
21:57
unless you manually configured it to use it
21:58
salomon_: look in the user's ~/.xsession-errors file ... look in /var/log/auth.log to make sure they're actually logging into the server
22:01
<salomon_>
they log into the server
22:05
this are the errors on the log
22:05
x-session-manager: Fatal IO error 11 (Recurso no disponible temporalmente) on X server localhost:11.0.
22:05
xfce-mcs-manager: Fatal IO error 11 (Recurso no disponible temporalmente) on X server localhost:11.0.
22:05
It means Resource not available temporarely
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22:10
<vagrantc>
right
22:11
seems a bit odd.
22:12
is X11Forwarding disabled in /etc/ssh/sshd_config?
22:12
salomon_: are you able to "ssh -Y user@server xeyes" from another computer?
22:14
<salomon_>
The strange thing is that it onle happens with one client, the other client works fine :(
22:14
let me check about X11Forwarding
22:14
<vagrantc>
that is strange indeed.
22:15
well, if it works with other clients, that's not the problem ...
22:15
<salomon_>
The 2 clients are diferent, the client that works fine is a PII 400MHZ with 256MB RAM
22:15
<vagrantc>
salomon_: you might want to set SCREEN_07=ldm SCREEN_08=shell SCREEN_DEFAULT=07 in lts.conf
22:15
then you'd get a shell on tty8 to debug what's going on
22:16
look at the logs in the client's /var/log and such
22:16
<salomon_>
ok, I will
22:16
<vagrantc>
might be a similar issue to compiz with gnome, too ..
22:16
<salomon_>
The client that had problem is a PI 233MHZ with 128MB RAM
22:16
<vagrantc>
!compiz
22:16
<ltspbot`>
vagrantc: "compiz" :: if compiz is giving you problems, one way to disable it for all users is: sudo gconftool-2 --direct --config-source xml:readwrite:/etc/gconf/gconf.xml.mandatory --type string --set /desktop/gnome/session/required_components/windowmanager metacity
22:16
<vagrantc>
that's getting pretty old ...
22:16
<salomon_>
I'm using XFCE, I don't thing that uses compiz
22:17
<vagrantc>
i don't know much about compiz, but it seems to cause problems on a few machines
22:17
salomon_: i don't know what else to try off the top of my head, but unfortunately, i've got to go
22:18
<salomon_>
ok, thabnks anyway :)
22:18
I appreciate it
22:19
<vagrantc>
seeing as i maintain ltsp on debian ... i do feel obliged to help a bit :)
22:19
though a lot of the ubuntu folks are pretty savvy with troubleshooting, too :)
22:19
anyways ...
22:20* vagrantc waves
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23:42
<salomon_>
I found that the problem is not xserver, it's something else since some times it can't even show the login screen cuz throws an error messages like "INFO: task xxx blocked for more than 120 seconds"
23:45
<abeehc>
what kind of hardware is it
23:46
<salomon_>
The client that hangs on is a Pentium I with 128MB (LTSP just need 32MB, as far as I know), so it is not a memory problem
23:47
some times I can login but it hangs a few seconds, when it is loading the desktop
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23:48
<salomon_>
I mean just work for a few seconds, I tryed seting SCREEN_07=ldm SCREEN_08=shell SCREEN_DEFAULT=07 in lts.conf
23:49
so I can change to a terminal and check some logs on the cliente but when it hangs, nothing works, not even the keyboard