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#1 (**permalink**) 01-19-2008, 08:42 AM

Hi, I've got Debian to work very well on an AMD Geode board (GENE-5315
from Aaeon) using a normal CRT. When I swap the monitor to a chassis
mount LCD monitor (800x400 pixels)
http://www.bvmstore.com/Embedded_ind.../tsc-090ds.pdf
I find on startup that the system hangs up when the boot command in grub
is issued.

If I start up with an ordianry CRT or LCD monitor everything is ok and I
can then swap to the chassis mount monitor and everything is fine.

I am guessing that the boot process tries to talk to the monitor to get
some sort of information. When the chassis mount monitor
(presumably)fails to respond, the boot process looks like it is just
sitting there, indefinately.

I can create a similar situation by trying to boot up with no monitor
attached at all.

tried the usual stuff like adding vga=771 etc. Didn't work.

Any ideas?

Thanks.

#2 (**permalink**) 03-07-2008, 02:28 PM

Rob Horton wrote:
> I find on startup that the system hangs up when the boot command in grub
> is issued.

I suspect it's trying to use a VGA mode that isn't supported by that
LCD. 800x400 is an odd resolution.

> I am guessing that the boot process tries to talk to the monitor to get
> some sort of information. When the chassis mount monitor
> (presumably)fails to respond, the boot process looks like it is just
> sitting there, indefinately.

It could be trying to get the EDID information from the monitor to see
what it supports, but I find that highly unlikely.

> I can create a similar situation by trying to boot up with no monitor
> attached at all.

How can you tell if it's halting on boot if you don't have a monitor
setup? Serial console?

> tried the usual stuff like adding vga=771 etc. Didn't work.

Try vga=ask.

- Ken

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LCD monitor stops Debian booting same as if no monitor is a attached!?