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


Channel log from 19 December 2010   (all times are UTC)

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11:14
<petre>
good morning all
11:14
I've installed LTSP using Ubuntu 10.4's alternative install CD.
11:16
It was a bit of a bumpy ride in that the default settings didn't work because the dhcp points clients to /ltsp/i386.tmp, when the real path is /ltsp/i386 (no .tmp on the end)
11:17
Any ideas as to why that's set that way?
11:18
Further, I can now get a client to load a kernel and initrd and X appears to start as I get some sort of a background image, but I never see the greeter/login prompt.
11:18
Any suggestions of where to look to figure out what's failing?
11:19
<alkisg>
petre: are you sure ltsp-build-client finished successfully? Maybe .tmp means that it didn't...
11:19
How big is the image? ls -lha /opt/ltsp/images/i386.img
11:22
<petre>
alkisg, 497MB
11:22
497389568 to be exact
11:23
<alkisg>
I don't use a default chroot but yes it should be around that
11:23
What do you mean "a sort of a background image"?
11:23
The ubuntu splash screen?
11:23
That's the default ldm background, do you see that? http://www.stgraber.org/download/images/ldm.png
11:25
<petre>
Yes, I get that background, but no ubuntu logo, no login box, no options or date or anything; just the white with the orange stripe on th left
11:26
and a mouse cursor
11:26
<alkisg>
Hmmm can you try to update your chroot, to verify that all packages were installed ok?
11:26
sudo chroot /opt/ltsp/i386 apt-get update
11:26
sudo chroot /opt/ltsp/i386 apt-get dist-upgrade
11:27
If you see any prompt about broken packages, then that's the problem...
11:28
<petre>
The first update just gave some messages about 'Failed to fetch cdrom'
11:29
but that's all.
11:29
<alkisg>
Copy your sources.list from the server to the chroot, and try again:
11:29
sudo cp /etc/apt/sources.list /opt/ltsp/i386/etc/apt/sources.list
11:29
(keep a backup if you want)
11:30
(not needed though)
11:30
<petre>
I'm waiting for the second command to complete.
11:30
<alkisg>
ok
11:30
<petre>
Then I'll copy the sources.list over.
11:31
I won't worry about backing up. This is new, dedicated machine to be used to train people on Ubuntu.
11:32
While I'm waiting, do client need at least 512MB of RAM?
11:32
What happens if one tries with just 256MB?
11:32
<alkisg>
256 is more than enough for thin clients
11:32
I have labs with 64MB
11:33
(that's the absolute minimum, though)
11:33
Is your network gigabit?
11:33
(and your clients etc?)
11:35
<petre>
server is gbit, clients 100Mb. switch has gbit port for server, 100Mb for clients
11:36
<alkisg>
Watch out for flow control problems then, they'll bring your whole network down to 100mbps: https://help.ubuntu.com/community/UbuntuLTSP/FlowControl
11:37
And here's a wiki page that describes chroot updating in more detail: https://help.ubuntu.com/community/UbuntuLTSP/UpdatingChroot
11:38
<petre>
Reran update and this time no errors.
11:38
<alkisg>
You also need to run sudo ltsp-update-kernels && sudo ltsp-update-image
11:38
<petre>
Do I need to rebuild the image?
11:38
<alkisg>
After all that, reboot your client
11:39
Not "build" in the ltsp-build-client sense, but "update", i.e. the 2 commands above
11:39
<petre>
rebooted client, same thing: background image, nothing else
11:39
<alkisg>
You didn't update the image
11:39
(07:39:31 PM) alkisg: You also need to run sudo ltsp-update-kernels && sudo ltsp-update-image
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11:40
<petre>
I've also got a P3 with 256 that loads the kernel but nothing else.
11:40
<alkisg>
That may be a network module problem, leave that for later
11:40
<petre>
It's probably worth mentioning that it's using a univeral ethrboot floppy.
11:40
<alkisg>
Ah. Don't :)
11:40
<petre>
ok, I'll put it aside for now.
11:40
<alkisg>
!gpxe
11:40
<ltspbot>
alkisg: "gpxe" :: the successor to etherboot (http://etherboot.org). To download bootable floppy, cd, usb, kernel etc images, visit http://rom-o-matic.net/
11:41
<alkisg>
Use that one instead ^^
11:41
And specifically the 1.0.0 version, not the 1.0.1
11:41
<petre>
Ah, yes, gpxe. Ok, will do
11:41
<alkisg>
There are known problems with older boot disks that use the older etherboot versions, before the gpxe switch
11:43
Does that P3 have windows installed?
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11:44
<petre>
No, was used with an ltsp 4.2 server in the past.
11:44
<alkisg>
OK
11:49
<petre>
(putting p3 aside for the moment)
11:49
I'm checking the flow control
11:50
Switch is unmanaged.
11:51
The server will be hosting only about 6 clients and not doing anything heavy, mostly being used to give a tour of Ubuntu.
11:51
Anyway, I'm still stuck with no login.
11:53
Updating image
11:53
(already updated kernel)
12:01
<alkisg>
E.g. watching a youtube video might need 80 mbps bandwidth, so disabling flow control on the server nic would be required for good performance
12:01
80*6 = 480
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13:02
<petre>
had to step away for a bit
13:02
we won't be doing any youtube, so that shouldn't be a problem.
13:03
I updated the image, but still getting the same result on the client of just getting the login background but no login fields, options, date, etc.
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13:06
<alkisg>
petre: there's a possibility that your chroot is broken, so if you have a fast connection I'd suggest `sudo mv /opt/ltsp /opt/ltsp-possibly-bad && sudo ltsp-build-client`
13:07
If it still doesn't work after that, ok, troubleshooting will be in order
13:09
<petre>
I'll start with the (re-)build
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14:29
<petre>
rebuilding the chroot made no difference; client displays only background for login screen.
14:30
I'm going to drop off for a few minutes: I want to reconnect the floppy drive in the server (which I'm on here) to make a gpxe floppy to try another client machine.
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15:11
<petre>
alkisg, good news! The P3 booting from the gpxe floppy works!
15:11
So, the problem with the client that just gets the background but no login prompts appears to be tied to that client.
15:11
It's a Dell laptop, fwiw.
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23:19
<alkisg>
petre: it's probably a driver problem then, try `sudo gedit /var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default` and replacing "quiet splash" there with "nomodeset"
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