Floating windows acting crazy, either flickering like mad or flickering and following the cursor

[ghost]

So far, I've seen this happen with Firefox's privacy popup (only when it pops up on its own), and with GIMP's color editor.

Behavior survives a reboot, and survives reloading or restarting i3. This doesn't happen with all floating windows, just some.

I think something in my config is causing it, but I'm not sure.
I even tried commenting out the lines that say

default_floating_border normal

and

for_window [floating] border normal

but that didn't help

Note: The flickering is much faster than it appears in the video.
Note2: Config attached below
Note3: I've also tried killing picom
Note4: This is i3-gaps 4.19.1 on Manjaro 21.1.16 (i3 community edition)
Note5: inxi -Fxxxza output attached

i3-config.txt

inxi.txt

Peek.2021-11-09.11-29.mp4

[Airblader]

This is very unspecific, but my first guess would be the compositor. Does it also happen if the compositor isn't running?

[ghost]

I've run it with and without picom running.

I will try to compare it to another machine and see if I get the same behavior, and whether or not I can find a substantive difference in the configs.

I've already commented out the only recent config change I can recall making.

Thanks.

[ghost]

Just did an sdiff between that box's config and my Pinebook Pro (also running Manjaro i3 community edition).
I don't see any substantive differences :/

If you have a recommended default config, I can try running that and attempting to reproduce the problem.

Thanks again, airblader.

[Airblader]

I don't think it's an i3 configuration problem. This is more likely to either be compositing or graphics driver related.

[ghost]

Interesting. I don't know what could be moving the mouse so strangely like that.

I took a better quality screencap to give a better idea how it's behaving. I also killed picom and xbanish (slim chance it's having any effect, but I had to check)

The odd thing is that the window starts drifting to the left. I'll try it again using a blank/stock config a little later and see if I can still reproduce it.

I also tried messing with my dual-monitor layout in arandr, but that didn't have any effect.

Thanks.

Peek.2021-11-10.12-36.mp4

[ghost]

Well, I did a reboot to troubleshoot further. I could have sworn I got it to happen again, but now it doesn't want to do it at all... but it has done it (or something very similar) before.

I guess the trail is cold now. Thanks for your time.