[SOLVED] Can't get KVM guest resolution/resizing to work on Fedora 35 host

angryJellyBean · 11-14-2021, 01:51 AM

I have Fedora 35 server edition installed and am managing via Cockpit web console. I have created a Debian guest VM and am unable to get resolution changes to take effect. They immediately revert, whether set within the Debian Settings > Display and Monitor, or using

Code:

xrander --size=size

, or changing the resolution in the VM's bios/uefi. I have installed spice-vdagent. Am I missing something else?

edit: I have also tried a few kernel parameters.

Code:

vga=ask

but that seems to be deprecated and no longer works. I have also tried setting

Code:

GRUB_GFXMODE

with

Code:

GRUB_GFXPAYLOAD_LINUX=keep

but that doesn't work either. Interestingly, it seems to be working for the boot environment (I guess it's just grub at this point?) But as soon as it gets to the login screen, it's stuck at default 1024x768. Adjusting window size just scales the display.

angryJellyBean · 11-14-2021, 08:40 PM

I found a post that explains this is apparently an unresolved bug with KDE and kscreen for many years now https://bugs.kde.org/show_bug.cgi?id=407058