[BUG] [PSA] : GPU bug causes crashes on KDE Plasma

Framework Laptop 16
5

Update: I just tried the workaround that’s been posted in this thread, and at the first couple of trials I’ve thrown at it it seems to have completely resolved the lockups. I’ll update again later if I find any noteworthy regressions.

Since I had a hard time finding a single source that gives all the steps for this workaround, they are as follows:

  1. Open a terminal window
  2. Run sudo nano /etc/default/grub
  3. Find the line starting with GRUB_CMDLINE_LINUX_DEFAULT=. This line may not exist; if it doesn’t, create it.
  4. Append amdgpu.dcdebugmask=0x400 inside of quotes after GRUB_CMDLINE_LINUX_DEFAULT=. If any other commands already exist here, add a space before the closing quote and insert amdgpu.dcdebugmask=0x400 between the space and closing quote.
  5. Press CTRL+X, press Y, and hit ENTER to save and close the file.
  6. Run sudo grub2-mkconfig -o /etc/grub2.cfg to update GRUB’s boot config.
  7. Reboot your laptop.
  8. Enjoy your now functioning full screen apps, while waiting for AMD/KDE to fix their panel refresh kernel drivers(?)

To undo this in the future, perform the steps in order again, but remove amdgpu.dcdebugmask=0x400 from /etc/default/grub rather than appending it.

2 Likes