LTSP some LCD monitors hangs during init

[Gavin McCullagh]

Hi,

On Mon, 26 Nov 2007, Christian Jorgensen wrote:

> On some monitors after the splash screen, i get a blinking cursor in the top
> left corner.
> 
> If I switch the monitor, the same client will work fine. Even if i boot the
> client plugging in the monitor only after the login screen, i get a
> standard vga mode. Then I can login and log out and thus the resolution
> is ok.
> 
> In the/var/lib/tftpboot/ltsp/i386/ lts.conf file i tried settings like
> 
> X_MODE_0 = 1024x768
> X_COLOR_DEPT = 16

The latter is spelt incorrectly, it should be X_COLOR_DEPTH.  I presume you
got that right in the test?  

> But so far without any result.
> 
> Is there some way to  get linux not to wait for confirmation that the image
> can be viewed or something ?

I don't think it's waiting for confirmation.  It sounds like X
configuration has bombed out somehow.  These parameters seem worth trying
setting:

---------------------------------------------------------------------------------------------
X_HORZSYNC          min-max MHz             autdetected      use for
forcing X_MODE
---------------------------------------------------------------------------------------------
X_VERTREFRESH       min-max Hz              autdetected      use for
forcing X_MODE
---------------------------------------------------------------------------------------------
X_COLOR_DEPTH       2, 4, 8, 16, 24, 32     32               set to 16bit
to save client mem
---------------------------------------------------------------------------------------------

If you can set the thin client root password and login to the client, you
should be able to see what values work (when you get it working by
unplugging the monitor) by looking in /etc/X11/xorg.conf.

	https://help.ubuntu.com/community/EdubuntuFAQ#head-285f03d2d3ed2f29847c7793dbdb8f1488814c1b
	https://wiki.ubuntu.com/DebugThinClientLogin

You can get a more verbose boot up by editing the file
/var/lib/tftpboot/ltsp/i386/pxelinux.cfg/default and removing the words
"splash" and "quiet".

Gavin