[Ltsp-discuss] LTSP PXE client PC stalling @ Ubuntu splash screen

Discussion:

Denis Croombs

2014-09-21 10:13:00 UTC

Hi

We have build 3 LTSP servers for 3 teams, 2 work perfectly ALL of the
time (different Vlans)
But 1 after approx 1 week the newest setup (max 11 users) of these
severs will be working and then if you reboot a PXE booted client
(worked perfectly before the re-boot) it will stall after it has
downloaded the boot image & it displays the Ubuntu splash screen and
the 5 or so icons below the word Ubuntu keep cycling and never stop.
All of the other clients continue to work perfectly until you try and
reboot them.
We set the memory setting to ensure ALL resources are on the server (no
applications are running locally just the screen, keyboard & mouse
handling)
We have checked the server resources (2 Vcpu, 2gb ram, plenty of disk
space and it is not using any of the swop space) and it is very lightly
loaded as we would expect.

Has anyone else seen this type of issue or can anyone give us a clue as
to what is happening between the Client & server at that time ?
We have Zero firewall rules between the Clients & the server, we can
only assume the client is setting up the SSH connection but we can see
no errors and the SSH server is working for the other clients.

Thanks for any clues

Denis

Vagrant Cascadian

2014-09-21 13:52:55 UTC

Permalink

Post by Denis Croombs
We have build 3 LTSP servers for 3 teams, 2 work perfectly ALL of the
time (different Vlans)
But 1 after approx 1 week the newest setup (max 11 users) of these
severs will be working and then if you reboot a PXE booted client
(worked perfectly before the re-boot) it will stall after it has
downloaded the boot image & it displays the Ubuntu splash screen and
the 5 or so icons below the word Ubuntu keep cycling and never stop.

...

Post by Denis Croombs
We have Zero firewall rules between the Clients & the server, we can
only assume the client is setting up the SSH connection but we can see
no errors and the SSH server is working for the other clients.

Denis Croombs

2014-09-21 14:42:51 UTC

Permalink

Thanks for the reply
We do not get the login just the splash screen, will try to disable the splash screen tomorrow, thanks for the advise

Rgds
Denis
Sent from my iPhone

Post by Vagrant Cascadian

...

Does it get to the login screen? Because the SSH connection is only
started after you've entered username and password...
If you set SCREEN_07=shell, does it give you a shell prompt?
You could disable the splash screen to see if you get useful debugging
in /var/lib/tftpboot/ltsp/*/pxelinux.cfg/default by removing the "quiet"
and "splash" arguments.
Good luck!
live well,
vagrant
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Jakob Unterwurzacher

2014-09-22 23:08:48 UTC

Permalink

Post by Denis Croombs
Thanks for the reply
We do not get the login just the splash screen, will try to disable the splash screen tomorrow, thanks for the advise

Looks a lot like:
https://bugs.launchpad.net/ubuntu/trusty/+source/linux/+bug/1330671

Does

# service nbd-server restart

fix the issue temporarily? (Warning: this may reboot all thin clients).

Best regards,
Jakob