there are 2 types of rare visual flickers i experience on a new laptop:
a horizontal line blinks for just one frame at random moments, not very frequent, hard to spot even. This line is seemingly always appears at mouse location, it has the height comparable to the mouse pointer (cannot say if it’s exact), and it seem to have the color of something under or near the mouse pointer
on some sites i have witnessed a full screen flickers of gray screen for a single frame. on some specific sites it seem to be appearing relatively frequently. (the whole screen flashes, not just the firefox window)
looking through forums - tried setting amdgpu.sg_display=0 even though people say it’s not required on newer kernels, but this setting seem to reduce the amount of flicker of type 2, but does not eliminate it completely. as for type 1 flicker - that I have not YET observed with that setting.
continuing to test.
Is this some known bug? have other users noticed this?
This is something we’re aware of that affects our AMD platforms. There are certain websites that make it very easy to replicate the issue but we’re still trying to determine a root cause as it seems to manifest a little differently between the Ryzen 7000 series, AI 300 Series, and AI Max 300 series. I’ve even seen the issue happen once on a 9070 XT in a friend’s desktop.
In my own experience it’s most likely to happen when the display is showing a majority bright color with a bar of darker color near the top of the page, with mouse movement in the area where the two colors meet triggering the flashes of grey. Sometimes just changing the scaling of a web page or changing the sizes of open windows is enough to either cause or workaround the issue.
Given this may be an amdgpu driver issue specifically, the AMD GitLab is probably the best place to track progress and share information on this. I’ll also make a note of this internally so we can understand the scope of this issue compared to others being tracked at the moment.