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Ever since upgrading to a 1440p 144hz monitor, Ubuntu has been displaying strange graphical distortions. This is one example:

graphical distortions on Ubuntu

This doesn't happen on Windows, therefore I think this is an OS-specific or software problem and not a hardware defect. It also didn't happen with my old 1080p monitor, and I haven't changed any settings since changing monitors (besides upping the refresh rate).

I'm not sure how to go about troubleshooting this, so any help is appreciated.

Note: I had to take a photo with my phone because screenshotting it didn't capture the distortions.

This also seems to happen spontaneously. Sometimes it works fine, other times the graphical distortions appear. I haven't been changing any settings, so I don't know why it randomly occurs some times and not others.

Output of lspci -k | grep -EA3 'VGA|3D|Display':

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Tahiti XT [Radeon HD 7970/8970 OEM / R9 280X]
    Subsystem: Micro-Star International Co., Ltd. [MSI] Tahiti XT [Radeon HD 7970/8970 OEM / R9 280X]
    Kernel driver in use: radeon
    Kernel modules: radeon, amdgpu
Daniel
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    Please [edit] your question and add output of lspci -k | grep -EA3 'VGA|3D|Display' terminal command. – Pilot6 Dec 30 '19 at 21:03
  • @Pilot6 just added it – Daniel Dec 30 '19 at 21:06
  • Note: I recently tried reinstalling drivers for my GPU and this didn't work. I also updated to Ubuntu 19.10, this didn't change anything either. – Daniel Jan 02 '20 at 06:00
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    Could you try testing limiting the resolution and framerate separately to see if it happens with only one or the other? xrandr --output HDMI-1 --mode 2560x1440 --rate 60.00 and xrandr --output HDMI-1 --mode 1920x1080 --rate 144.00 (change your output accordingly) – Vardogor Jan 02 '20 at 10:02
  • @Vardogor the 144hz refresh rate seems to be causing the issue (not the resolution) – Daniel Jan 02 '20 at 23:59
  • @Crabtree I'm not using an adapter, just a DisplayPort to mini DisplayPort cable. This is the only cable that supports 144Hz, therefore I'm not going to use another cable (nor will it be able to test this problem because it'll be at 60Hz). If the cable was the problem this would also be causing issues in Windows. – Daniel Jan 03 '20 at 22:48
  • Are you using any overclocking software by chance? I had an issue similar to yours long ago because I was tweaking my GPU clock speeds. – Crabtree Jan 04 '20 at 11:02
  • @Crabtree nope, nothing is overclocked – Daniel Jan 05 '20 at 06:10

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