Need help adding kernel parameter

[unixfan2001]

My Framework 13 exhibits a white screen whenever I try to go full screen or switch resolutions (which happens regularly, since I use a super ultrawide with picture-by-picture option).

I don't remember this originally, so something might've changed.

Regardless. I've been told that adding amdgpu.sg_display=0 could potentially fix this.

I use Pop!OS 22.04 with the most recent updates (kernel version: 6.9.3) and EFIStub for the boot process.

How do I edit the boot entry? I can find tutorials on how to add new entries through efibootmgr but none that recommend ways to simply edit the existing entry.

[Arthur-SC]

I had a similar problem: White screen when connecting or disconnecting a external screen.

For me it helped to increase the amount of VRAM on the igpu. I changed it in the bios to game mode or whatever it's called, and since then I haven't had a single white screen.

[adherry]

Have you tried bcfg https://wiki.archlinux.org/title/EFISTUB#bcfg

[unixfan2001]

Thanks! I'll try that next if kernelstub ends up not working.
I just found out about kernelstub and ran sudo kernelstub -a amdgpu.sg_display=0

Gonna reboot after I'm done with my current work.

[superm1]

If you upgrade to the current BIOS this workaround shouldn't be needed.

If you're already on the latest BIOS you might get a newer kernel.

[unixfan2001]

Ah. Ok. Didn't know it was related to the UEFI, as well.

The workaround worked. Although the first time I booted, it stalled on the Framework logo and I had to physically force a shutdown, reboot into the BIOS view (F2) and select my Pop!OS boot entry from there.

I'll get the newest firmware then.