Ubuntu 26.04 LTS. Linux 7.0.0-22 generic. Bios 4.04. FW 16 7040 series with 7700S graphics card installed.
The following graphical glitch has been occurring since I reinstalled linux a few days ago. I’ve tried both kde and gnome with no success of getting rid of it.
I don’t remember this occurring on my old fedora-kde installation, but I opted for ubuntu this time cause I figured with the new pro being certified, they would just have better support in general.
I’ve seen some other posts where they recommended running
echo off | sudo tee /sys/module/i915/parameters/mitigations
but the /sys/module/i915 directory does not exists on my installation.
I’ve attached a video link of the glitch if anyone has seen this before and knows how to get rid of it! Please and thank you!
Hey @austindoestuff If what has been recommended doesn’t work for you, please reach out to our support and ask to be escalated to the Linux team. We’ll be happy to take a look and do some testing with you!
This is definitely troubling to see because we were hoping this issue had been fixed in kernel 7.0. This could be a different but similar issue that also needs fixed though. I’m going to do some testing on my AMD devices, because this is an issue that we generally see persisting through hardware replacements and is troublesome because it does not leave much useful information in the system logs without a specially compiled kernel that enables more debug output.
I have noticed that the glitches don’t occur when playing games, so maybe it’s probably some sort of issue with the integrated graphics?
I don’t know if that aligns with your understanding of what was previously causing issues?
I also believe that it has gotten better since allowing variable refresh rate instead of keeping the system at 165 hz, but it still occurs every so often.
If I can be of any help, lmk. I can send more details about my specific setup or whatever else.
I just had the same issue with my new Framework 16 running Bazzite 44 (kernel 7.0.9-ogc3.2.fc44). Setting the Display option Adaptive Sync to Always seems to have solved it, as did adding kernel option amdgpu.dcdebugmask=0x410
No, a fresh Ubuntu install is running GNOME, which won’t have this option. The variable refresh rate “enabled” option is more like the “automatic” adaptive sync in KDE, which won’t work. Only setting “Always” in KDE works
For any future reference, setting amdgpu.dcdebugmask=0x410 did in fact work for me. I just forgot to update-grub afterwards to actually make the changes.
As far as I’m aware, this change will affect power consumption by disabling PSR, so I don’t think this is an ideal long term solution if power efficiency is a priority.
