Boxes formed and background blurred abnormally in lock screen.

[dexprexxtion]

Describe the problem: In the lock screen, black boxes with medium opacity are formed around the password input box, the user picture, the top bar, etc. The boxes appear and change position every second, often forming a pattern. (1) Sometimes the boxes appear and the background image of the desktop is blurred normally but the boxes remain. (2)However, sometimes the entire background becomes black and the desktop wallpaper is visible only in the areas of the boxes, blurred.

When tried to take a screenshot, it could only be taken of (2) which is included below along with my desktop wallpaper to better understand the issue.

Lock screen Wallpaper

Steps to reproduce: I don't really think this can be reproduced but I'll still provide some details.

1. Set the wallpaper provided or any wallpaper.
2. Go to the lock screen.
3. Scroll to get the password input dialog.

And the boxes appear.

Distribution: Pop!_OS 22.04 LTS

Pop version: Installed: 5.5.1~1664464633~22.04~e09de35 flatpak info org.gtk.Gtk3theme.Pop returns error: org.gtk.Gtk3theme.Pop/*unspecified*/*unspecified* not installed even though I clearly use the pop_dark theme as shown below.

Specifications CPU: Intel® Core™ i5-2400 CPU @ 3.10GHz × 4 RAM: 8.0 GiB Graphics: NV96 Disk Capacity: 240.1 GB SSD GNOME version: 42.5 Windowing System: X11

[leviport]

Graphics: NV96

My guess is that this is a quirk with the Nouveau driver. At least, I'm assuming that you aren't running a super old Nvidia driver that supports that card?

[dexprexxtion]

No I'm not using Nvidia drivers. I'm using Nouveau drivers as using Nvidia drivers which support my graphics card cause display issues. My GPU is GeForce 9400 GT which has available drivers.