[GRLUG] Install video

[Grand Rapids Linux Users Group]

Video issues like this are always frustrating.  It isn't quite clear when
you are having issues here, but it sounds like you have booted from USB to
install SuSE, and after the install when booting your disk drive are losing
video after Grub once the boot sequence starts.  If this is the case, there
are a few things that you can try to debug the issue - mostly editing your
kernel parameters on boot.  Within Grub, you'll want to edit your current
boot options.  You'll probably want to do a couple things here:

1.  If "quiet splash" exists, get rid of them.  This will disable the OS
boot logos/animiations and show the kernel output on boot.  This might show
some error in the process.
2.  If that doesn't help, try adding the "nomodeset" parameter.  This will
disable the kernel from loading a video driver until after X is loaded.
3.  If that doesn't help, try adding a manual VESA vga mode.  Something
like "vga=791" which should force it to VESA 1024x768 16bit.
4.  If there is a bad kernel module that is causing the issue and you know
what module that is, you might want to blacklist it.  You can blacklist it
on boot by adding this to your kernel parameters.    "module_name.blacklist=1
rd.driver.blacklist=<<module_name>>"   (fill in the << >> area with your
module name)

Good luck!

Some reading on the topic:
https://github.com/torvalds/linux/blob/master/Documentation/admin-guide/kernel-parameters.txt
https://askubuntu.com/questions/716957/what-do-the-nomodeset-quiet-and-splash-kernel-parameters-mean

Chris

On Sun, Nov 14, 2021 at 3:16 PM Grand Rapids Linux Users Group <
grlug at grlug.org> wrote:

> Building a new system with an Asus B560-Plus & an i5; booting from USB
> works fine, but when switching between Grub2 and the install process the
> video switches and then disappears; tried two different distros, but DNW
> (SuSE 15.3 & 15.2) after initial boot; two different monitors also.
>
> Seems like the video mode of the 2nd stage is not supported, .. anyone
> seen anything like this before?
>
>         Thanks!
> --
> grlug mailing list
> grlug at grlug.org
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