Re: Re: Display setting problem -

[Richard Sewill]

I hesitate trying to answer this question because what I am doing may be
wrong.

I tried the following on F18.

I edited the line, found in file /etc/default/grub, which starts
GRUB_CMDLINE_LINUX="rd.md=0 ... rhgb quiet"
appending strings so it had
GRUB_CMDLINE_LINUX="rd.md=0 ... rhgb quiet"
drm_kms_helper.edid_firmware=edid/1024x768.bin video=VGA-1:e

I next edited any existing lines in /boot/grub2/grub.cfg that had the
string "rhgb quiet" to include the
drm_kms_helper.edid_firmware=edid/1024x768.bin video=VGA-1:e
string which I since learned is the wrong things to do.

> From my limited understanding, /boot/grub2/grub.cfg is auto-generated
> using 
/etc/default/grub each time /boot/grub2/grub.cfg is recreated.
I should have used the grub2-mkconfig command instead of editing
/boot/grub2/grub.cfg directly.

I got this idea reading
https://wiki.archlinux.org/index.php/Kernel_Mode_Setting#Forcing_modes_an...
and
https://www.osadl.org/Single-View.111+M5b7fe294ea7.0.html

In my case I wish to run a headless server, but wish to have Linux believe
there is a certain size window if I vnc into the server using x11vnc on the
server.
My vnc client happens to run on a laptop with a screen size, 1024x768.

I do not know if you need the video=VGA-1:e because you indicated you have
a monitor connected.
I do not know if you can use one of the four standard timings that are
hard-coded in the driver.
Please note: there are notes saying this works only with certain drivers.
I am using the nouveau driver.
I don't know if this works if you are using the nvidia driver; a note in
one of the URLs said it did not work with the nvidia driver at one time.

Please save any files before editing.  You and I don't know if this will
work for you.  It's best to play it safe and have backups just in case.

>