> "-vga virtio -display sdl" crashes my whole wayland/sway session (=>
needs further investigation)
Re-executing this in a stock GNOME Shell environment, it also works as
expected and is able to change resolution just fine.
$ qemu-system-x86_64 -enable-kvm -m 2G -nic user,model=virtio-net-pci
-vga virtio -display sdl -cdrom xubuntu-25.10-desktop-amd64.iso
I'm really unclear what could be the culprit here. I have a suspicion that it
might not be related to the graphics stack, but rather the input stack (e.g.
input0: usb-tablet), because of the observation that Heinrich made in comment
#6 (and I confirmed in #11): The screen resolution changes, but the
mouse-pointer has a certain offset in x+y directions, so we cannot click any
buttons and the screen can make the impression of being frozen.
We need a better reproducer in order to narrow this down. It must be
some setting (commandline argument) that libvirt adds by default, but is
not there in a basic run of "qemu-system-x86_64". We need to find which
one is triggering the issue.
Any help would be appreciated!
** Changed in: qemu (Ubuntu)
Importance: Undecided => Low
** Changed in: qemu (Ubuntu)
Status: Triaged => Incomplete
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https://bugs.launchpad.net/bugs/2126798
Title:
Can not change screen resolution in Xubuntu-25.10-beta running in
KVM/QEMU
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