Something very odd that I’ve noticed. Qubes seems to be a bit slow. despite me having a fairly beefy machine. Things like the windowmanager being a bit laggy, and my windows having “tracers”
I looked at my xentop and saw that all my VMs are using the maximum memory allocated to them. For example firewall using 4GB, disp (whonix-dvm) only running TB using 4GB, vault only with KeePass open using 4GB etc.
Any VM that I open will use the maximum memory available to it (4GB) despite being configured with a minimum of only 500MB
Is there any way I can confirm that CPU rendering is being used? lspci shows that the GPU connected to my monitors is correctly using the amdgpu drivers, and the other GPUs are also using the nouveau.
I wonder if the fact that there are multiple GPUs in the workstation is confusing Dom0, or if just having 4K displays is stressing it out too much?
xfwm has already has compositing disabled, enabling it makes it MUCH worse. I don’t think GPU performance should be a problem, on Other OSs running multiple monitors at their highest refresh rates is perfectly smooth.
Could the wrong amount of gui video RAM buffer be causing this? I’ve tried setting it with: $ qvm-features dom0 gui-videoram-min 81000 2 x 2160p monitors, + 1080p monitor = 81,000
Perhaps I’ve set the gui-videoram-min incorrectly though…
Thanks, this answers my question perfectly. Is there some benefit to setting the maximum memory to something lower on VMs that likely dont need all that much, such as sys-* to avoid memory balancing overhead once enough qubes are running?
Thanks, this helped me identify the problem. the xorg log was saying that it could not find amdgpu.
I got the correct package with sudo qubes-dom0-update xorg-x11-drv-amdgpu
and xorg logs showed that driver was found and using the amdgpu successfully, however the screen still had issues with very long trailers.
What needed to be done was to hide the other GPUs from dom0 by editing the grub config, now it seems to be working much better, albeit not perfectly, as there is still some trailers, but not nearly as many as before. Its at a level where I don’t really care, I just wonder if its a sign that theres still some other configuration or setting that should be tweaked.