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


Channel log from 18 September 2011   (all times are UTC)

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07:39
<electrodib>
hi all! experiencing an unusable screen after booting a dell fx130 thin-client on a ubuntu 10.04 ltsp. Any hint ?
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07:47
<alkisg>
What does "unusable screen" mean, specifically?
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08:02
<electrodib>
either screen 7 or screen 1 show random pixels
08:03
<alkisg>
!nomodeset
08:03
<ltsp>
alkisg: nomodeset: Unfortunately, Kernel Mode Setting (KMS) doesn't work well with some cards. To disable it, open /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default and replace "quiet splash" with "nomodeset".
08:03
<alkisg>
Try that, see if it helps
08:08
<electrodib>
during the boot, i can see loading vmlinuz, initrd.img... ready, then the verbose boot start, and then the screen go random art pixels...
08:09
i've already removed quiet splash, and now just added nomodeset without luck
08:11
<alkisg>
If you put SCREEN_02=shell in lts.conf, so that X doesn't try to start at all, do you still see random pixels?
08:19
<electrodib>
yes. in fact, it seems that the boot process get stuck even before reading lts.conf (whatever the number of SCREEN_XX i put in lts.conf, always have screen 1 and 7)
08:19
<alkisg>
Are you sure that you're modifying the correct pxelinux.cfg/default, and the correct lts.conf?
08:19
Maybe you're using the wrong path...
08:20
Anyway try this: in pxelinux.cfg/default, put: init=/bin/bash
08:20
This is the earliest you can have a prompt, after the initramfs
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08:36
<alkisg>
To verify if you're using the correct pxelinux.cfg/default or not, change "vmlinuz" to "notexists" and verify that it doesn't even load the kernel
08:45
<electrodib>
i am using the correct pxelinux.cfg/default, tested with another machine, works (even splash screen ok) then hangs with error :
08:46
failed to connect to NBD server... ok, ok, how do I configure this nbd server ?
08:48
<alkisg>
So now you're past the random pixels problem?
08:49
Or are you just using another client until you properly configure your server?
08:51
<electrodib>
yes, using another client... need to configure this nbd-server thing, don't know how :-(
08:51
<alkisg>
Which distro/version are you using?
08:51
<electrodib>
ubuntu 10.04
08:51
<alkisg>
Paste the output of those commands:
08:51
grep nbd /etc/inetd.conf
08:52
grep initrd /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default
08:52
ls -l /opt/ltsp/images
08:53
netstat -nap | grep :2000
08:57
<electrodib>
hum, no inetd.conf, and no nbd in xinetd.conf - initrd in pxelinux: append ro initrd=initrd.img quiet splash nbdport=2001
08:57
and nothing listen on port 2000 nor 2001
08:57
<alkisg>
Hmmm maybe people using xinetd recently...
08:57
<electrodib>
and no config in /etc/ndb-server/
08:58
<alkisg>
Did you deliberately choose xinetd over openbsd-inetd, or it happened by mistake?
08:58
(Ubuntu/LTSP uses openbsd-inetd by default)
09:01
<electrodib>
this server config is in fact an openvz container from proxmox with a "standard ubuntu 10.04" preinstalled. then i've just added ltsp-server-standalone
09:01
<alkisg>
Maybe those people preinstalled xinetd for some reason
09:02
Better install openbsd-inetd instead, so that you have a usual ltsp installation, it'll make things easier for troubleshooting
09:02
sudo apt-get install openbsd-inetd
09:02
and to autoconfigure nbd:
09:02
sudo ltsp-update-image --force
09:26
<electrodib>
hey, cool, it works !! at least for a standard pc. now i need to make it works with this damned Dell-fx130. Anyway, thanks so far for your help, alkisg !!
09:27
<alkisg>
electrodib: ok, so for dell-fx130, are you sure that if you put "init=/bin/bash", you still get the problem?
09:27
That would mean that the problem happens too early, in the initramfs
09:28
<electrodib>
yes, it seems to happens when switching to framebuffer...
09:29
<alkisg>
It shouldn't switch to framebuffer with "quiet splash" removed and "nomodeset" in it
09:29
That's why I believe that you either didn't do it correctly, or that you're using the wrong path
09:30
Without "quiet splash" and with "nomodeset", the only change that happens is with console-setup, which loads the character fonts into vga tables
09:30
If *that's* the problem, then you can tell console-setup to not change the default vga tables
09:30
<electrodib>
hum... so the pxelinux.cfg/default line to edit would look like: append ro initrd=initrd.img nomodeset init=/bin/bash, right ?
09:30
<alkisg>
Yes
09:32
<electrodib>
i'm pretty sure of the right path for this file, as i'm in fact using pxelinux.cfg/01-00-e0-c5-45-86-c9 and see the fx130 loading this file
09:33
<alkisg>
Good. So, let's see if the problem is the vga tables
09:33
Replace "init=/bin/bash" with "break=top"
09:33
Reboot the client. Do you get an initramfs prompt?
09:35
<electrodib>
yes, sir
09:36
<alkisg>
Now we want to test replacing the "setfont" executable with a harmless one
09:36
While still in the initramfs (==temporary change)
09:36
Unfortunately we don't have /bin/true to symlink to it
09:37
So, do this: echo '#!/bin/sh' > /bin/setfont
09:37
chmod +x /bin/setfont
09:37
<electrodib>
hum, i've a prompt, but can't write anything at it !!
09:37
<alkisg>
And then press ctrl+d to exit the prompt
09:37
Ah, you have a usb keyboard?
09:37
Can you get a ps/2 one?
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09:38
<electrodib>
yes, usb... i have some ps2 somewhere, back in a few minutes...
09:42
<alkisg>
Remember that you need to power off the client to plug in the ps/2 keyboard
09:46
<electrodib>
all done, without success !!
09:53
<alkisg>
So it still had the problem at the same point? Or later on, after the initramfs, when setfont was called again from the nbd image?
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09:55
<alkisg>
Btw, it might be a good idea to try to boot that with a live usb stick
09:56
But in any case, if you put "break=top" and disable setfont, and at the same time have "init=/bin/bash" so that it gives you a shell as early as possible, then your VGA shouldn't be touched by linux at all.
09:56
So it would be very very strange if you had problems with those conditions.
10:01
<electrodib>
Yes, after disabling setfont, screen become random before having a shell. Haven't have any success with my ubuntu 10.04 usb, but the fx-130 start natively with a ubuntu 9.04 heavily modified by devon it
10:02
so at least i know it can start a X server
10:04
<alkisg>
Which graphics card does it use?
10:04
*have?
10:12
<electrodib>
so it's a VIA for almost everything : VIA Eden proc, VIA usb, VIA pic, etc... except for the ethernet (Realtek RTL-8110)
10:14
<alkisg>
Maybe some broken graphics module then, which breaks your VGA even before X
10:14
Well, you can use a 9.04 chroot in your 10.04 server, if you don't find another solution
10:15
ltsp-build-client --dist=jaunty or something like that
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10:35
<Hyperbyte>
mhm
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13:43
<electrodib>
hello alkisg ! finally i've installed the latest ubuntu 11.04 and at least it boot ! Thanks again for your patience :)
13:43
<alkisg>
You're welcome
13:43
You could also install a different kernel
13:44
With apt-get install linux-lts-backport-image-natty
13:48
<electrodib>
why not. I always prefer LTS version when it's not for me... Anyway, i've a brand new task : connect this ltsp server with samba4 (AD) users...
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18:45
<markit>
so quiet today...
18:47
<alkisg>
It usually is, on Sundays...
18:48
<markit>
well, I have more time on sundays to chat, other days usually I worl
18:48
work
18:49
except today, that I have to work for a rails project I'm in troubles with
18:49
btw, I've subscribed diaspora, do you want an invite too?
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18:50
<alkisg>
Another social networking site? :O
18:50
Anything special there?
18:50
<markit>
yep, should be build to respect users
18:50
very rare feature
18:50
is also distribuited by design
18:51
well, better googling at it if you want, is in alpha stage
18:51
of course will never kill FB or google+
18:51
is build on rails and AGPL3 code, you can grab the source
18:52
http://en.wikipedia.org/wiki/Diaspora_%28software%29
18:52
<alkisg>
So normally a user installs it in a web serverr?
18:52
(yeah reading that as we speak...)
18:53
<markit>
only if you WANT to run the server, otherwise you don't have to (I don't)
18:53
<alkisg>
I'm wondering if it could be used to organize teachers + students in schools
18:59
<markit>
hehehe :)
18:59
never tried moodle? (me not, but seems the right product)
19:00
<alkisg>
I did... I don't know it seems to me like it misses something to make it attractive
19:00
Maybe it needs more ajax
19:04
<markit>
well, if you want to have a look (it's in Alpha stage) I can send you an email-invite
19:05
<alkisg>
Nah I'll wait till it gets more publicity etc
19:05
<markit>
ok, no problem :)
19:06
back to work now, see you :)
19:06
<alkisg>
Those things are time killers :D facebook, wave, google plus...
19:06
bb
19:06
<markit>
hehehe, really, irc also
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19:06
<alkisg>
Indeed
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22:35
<highvoltage>
heh, busted
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