HI Samuele,

Its look like some thing to do with INTEL video card.
Then the following you should do:

- Edit /boot/grub/grub.cfg (MAKE back-up first of the original one).

- Search for lines that contain some thing like this:
linux /vmlinuz-2.6.32-xx-server root=UUID=(......-......,etc)  ro  quiet
splash i910.modeset=0  (am not sure could you try  also i910.modeset=1).

save the changes and reboot thin clients (pentium IV).
Thats it ..

Let me know if it worked for you
Good luck..

Safa Al-Saki
www.freewebs.com/tododigitalvzla




2012/1/10 stefania zanette <stefy.zanette@gmai...>

> Hi my name's Samuele from Italy. Sorry for my English...I need help!
> I'm working to do a new computer lab for a primary school. I use ubuntu
> 10.04 64bit with ltsp protocol on the server. There are 15 clients(11
> pentium III and 4 pentium IV). This is the problem: when I login with PIII
> I haven't any problem while with PIV's I login only with first user that I
> created in the server. I can't login with the other users. If I login with
> another user PIV try to login, I see the Ubuntu desktop and login sound but
> after 2 seconds PIV return to the login window.
>
> Any solutions?
>
> This is my lts.conf configuration:
>
> [default]
> LDM_DIRECTX=True
>     X_COLOR_DEPTH=16
>     LOCALDEV=True
>     SOUND=True
>     NBD_SWAP=True
>     SYSLOG_HOST=server
>     XKBLAYOUT=de
>
> [00:D0:B7:20:AB:1B]
>     XSERVER = vesa
>
> [00:50:04:65:DD:D7]
>     XSERVER = vesa
>
> [00:50:04:0B:51:45]
>     XSERVER = vesa
>
> [00:50:04:BB:07:D0]
>     XSERVER = vesa
>
> [00:01:02:B0:27:E7]
>     XSERVER = vesa
>
> [00:13:21:06:89:FD]
>     XSERVER = vesa
>
> #[00:13:21:06:A7:E3]
>  #   XSERVER = vesa
>   #  NBD_SWAP= False
>
> #[00:14:C2:03:4E:20]
>  #   XSERVER = vesa
>   #  NBD_SWAP= False
>
> #[00:13:21:06:A8:1B]
>  #   XSERVER = vesa
>   #  NBD_SWAP= False
>
> #[00:13:21:06:A7:17]
>  #   XSERVER = vesa
>   #  NBD_SWAP= False
>
> The last 4 macaddress are PIV(the others are PIII with integrated video
> card) but with this configuration(if I remove comment #) the  login windows
> is black and I can't login with any users!
>
> The PIV's integrated video card is INTEL®82915G/GV/910GL EXPRESS CHIPSET
> FAMILY
>
>
> Thank you for your responses.
>
>
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