AMD GPUs often don't like KVMs. To fix this we can turn on the GPU power management using GRUB.

fix-amd-gpu-sleep-issue.md

Add the Kernel Parameter

Let's tell the amdgpu driver to disable its runtime power management, which is the component that's failing to resume.

1. Open a terminal and edit your GRUB config:

sudo nano /etc/default/grub

2. Find the line GRUB_CMDLINE_LINUX_DEFAULT=.

3. Add amdgpu.runpm=0 inside the quotes.

• Before: GRUB_CMDLINE_LINUX_DEFAULT="quiet udev.log_priority=3"

• After: GRUB_CMDLINE_LINUX_DEFAULT="quiet udev.log_priority=3 amdgpu.runpm=0"

4. Save the file (Ctrl+O, Enter) and exit (Ctrl+X).

5. Update GRUB:

sudo update-grub

6. Reboot your machine and try to replicate the problem (lock the screen, switch the KVM, switch back).