Laptop display problems

[Barry Cisna]

Hello All,

Has anyone on list had any luck getting any laptop displays to work with
the last couple iterations of LTSP - 5?
I have 5 test laptops that are about 2-5 year old units,that none will
get a display.
In syslog each machine does end up with a couple of ldminfod lines as
though 'behind the scene" they are getting a login dialog.
The display ends up at Booting Linux",,I never see the 'switch root
lines.
Would a different pxe.0 file make any difference?It seems many moons ago
a different pxe.0 file fixed some TC nic problems?

Thanks,
Barry

[Barry Cisna]

Hello All,

After doing some research I found that some kernel updates to CentOS 6
on many laptops xorg would try and generate an x for two monitors on a
given laptop.

Knowing this I hanged an external monitor on each of the laptops that i
have on test bench and the external monitor does get a display as
expected. Not really a fix by any means but it appears this is the
problem with no display on laptops.

Barry

[Burke Almquist]

Post by Barry Cisna
Hello All,
After doing some research I found that some kernel updates to CentOS 6
on many laptops xorg would try and generate an x for two monitors on a
given laptop.
Knowing this I hanged an external monitor on each of the laptops that i
have on test bench and the external monitor does get a display as
expected. Not really a fix by any means but it appears this is the
problem with no display on laptops.
Barry

Maybe there is something in the BIOS you can toggle to say that the onboard is the primary/only display?

[Barry R Cisna]

Burke,

Thank You for the BIOS change suggestion. Albeit, all 5 of these laptops
got a display as they are with the previous versions of K12Linux client
chroot. I haven't changed anything in the BIOS.
Tomorrow I will look in the BIOS and see if there is in fact a setting i
may be able to switch up.

Sidenote: just a couple days ago I did switch the LVDS setting that is
now in the default pxe file, startup options file but this did not make
any difference.

Barry