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Display flickering when playing games

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Brief summary of the problem:

6900XT would flicker when playing games, and very occasionally, when I'm just on the desktop. When left unattended long enough (or sometimes almost immediately), system reboots. It's like the system is not using the maximum amount of power the 6900XT can provide.

Hardware description:

  • CPU: Ryzen 9 5900X
  • GPU: Asrock 6900XT Phantom Gaming D 0c:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Navi 21 [Radeon RX 6800/6800 XT / 6900 XT] [1002:73bf] (rev c0)
  • System Memory: 64GB
  • Display(s): 1440P Asus TUF Gaming VG27AQ1A (primary) + 4K BenQ EW3270U
  • Type of Display Connection: DP

System information:

  • Distro name and Version: Kubuntu 21.10
  • Kernel version: Linux Y4M1-II 5.15.15-76051515-generic #202201160435164269382421.10~97db1bb SMP Thu Jan 20 17:35:05 U x86_64 x86_64 x86_64 GNU/Linux
  • Custom kernel: N/A (unless Pop!_OS's kernel is considered custom)
  • AMD official driver version: N/A

How to reproduce the issue:

Tried the following games:

  • Star Wars JEDI: Fallen Order
  • Cyberpunk 2077
  • Life is Strange True Colors
  • Mass Effect: Andromeda

I noticed that the power doesn't go above 150W (according to CoreCtrl).

I have a ZOTAC GTX 1060 6GB for VMs. Taking it out didn't help. And my gaming PC has 1000W PSU.

I also tried to downclock from the "default" 2660 MHz.

Here's the default before I enabled amdgpu.ppfeaturemask=0xffffffff image

Attached files:

Screenshots/video files

[ TODO: For rendering errors, attach screenshots of the problem and (if possible) of how it should look. For freezes, it may be useful to provide a screenshot of the affected game scene. Prefer screenshots over videos. ]

Log files (for system lockups / game freezes / crashes)