Black screen on non-native resolutions of 2 laptops on bazzite-gnome

[citral23]

Describe the bug

On a lenovo slim 7 with ryzen 5700U and lenovo yoga 7 with ryzen 7 7735HS, trying to set any non-native resolution results in a black screen

(for instance, 1920x1200 instead of 2560x1600)

This is problematic because fractional scaling still has its fair share of issues, like remote desktops being impossibly high resolutions or scrcpy being extremely small and not getting to the proper coordinates.

This is the desktop bazzite-gnome image for both, without gamescope-session. The problem does not occur with external displays plugged in as HDMI nor DP.

What did you expect to happen?

I expect lower resolutions to display properly, like they do on plain Fedora, Debian etc.

Output of rpm-ostree status

State: idle
Deployments:
● ostree-image-signed:docker://ghcr.io/ublue-os/bazzite-gnome:stable
                   Digest: sha256:469e773118b5c357113e9ac77a766f293ca581f44c61cddf40e9bd1917e3d4ca
                  Version: 41.20241216 (2024-12-16T04:57:45Z)
          LayeredPackages: edk2-ovmf libvirt qemu virt-manager

  ostree-image-signed:docker://ghcr.io/ublue-os/bazzite-gnome:stable
                   Digest: sha256:469e773118b5c357113e9ac77a766f293ca581f44c61cddf40e9bd1917e3d4ca
                  Version: 41.20241216 (2024-12-16T04:57:45Z)

Hardware

No response

Extra information or context

No response

[citral23]

This is still broken on bazzite testing, will rebase to silverblue to see if the bug is upstream or bazzite specific.

[citral23]

The bug does not occur in silverblue. It may or may not be related to experimental VRR that is not in silverblue (toggling it in bazzite doesn't help though) but I have no way to know, there isn't anything in the logs about the black screen when changing resolution.