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
  • 2
    Please edit your question and add output of lspci -k | grep -EA3 'VGA|3D|Display' terminal command.
    – Pilot6
    Commented Dec 30, 2019 at 21:03
  • @Pilot6 just added it
    – Daniel
    Commented Dec 30, 2019 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
    Commented Jan 2, 2020 at 6:00
  • 1
    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
    Commented Jan 2, 2020 at 10:02
  • @Vardogor the 144hz refresh rate seems to be causing the issue (not the resolution)
    – Daniel
    Commented Jan 2, 2020 at 23:59


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