Arch Linux

noraj2

Member

From: France, Europe

Registered: 2022-02-09

Posts: 20

low screen resolution at boot with secure boot on

Before, when I was booting, I had my resolution at full HD (1920x1080) while on my bootloader (rEFInd) and or systemd init logs.
Then I configured my BIOS to enabled Secure Boot (CSM disabled, ADM fTPM enabled). The other change due to Secure Boot is that now I load PreLoader.efi that is loading rEFInd (loader.efi).
Since then, I have very low resolution (probably 640 × 480) while booting.

I already read this post. The common fix is to disable CSM but I have it already disable because it was a requirement for secure boot. The solution on Gentoo forum was to set "Boot logo" to "Full" but in my case I have only "Auto" (what I set) and "Disable" option.

My motherboard is a Asrock AB350 Pro4.

I'll try setting a custom size in refind.conf and if it doesn't work I may try modelist.efi.

noraj2

Member

From: France, Europe

Registered: 2022-02-09

Posts: 20

Re: low screen resolution at boot with secure boot on

setting "resolution 1920 1080" in /efi/EFI/refind/refind.conf fix the resolution for rEFInd (so secure boot break resolution auto-detection) but I still have low resolution during systemd init.