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+
+Guest display resolution cannot be changed when using certain graphics/interface combinations
+
+Guest display resolution cannot be changed with certain virtual graphics card (-vga) and interface (-display) combinations.
+
+For example, resolution changing doesn't work with the following QEMU start commands, it resets to the default resolution immediately:
+
+QXL with SDL interface:
+qemu-system-x86_64 -enable-kvm -m 6G -cpu host -smp 3 -cdrom ./linux/kubuntu-20.04-desktop-amd64.iso -boot d -vga qxl -soundhw hda -display sdl
+
+QXL with GTK interface:
+qemu-system-x86_64 -enable-kvm -m 6G -cpu host -smp 3 -cdrom ./linux/kubuntu-20.04-desktop-amd64.iso -boot d -vga qxl -soundhw hda -display gtk
+
+QXL with "remote" SPICE interface via unix socket:
+qemu-system-x86_64 -enable-kvm -m 6G -cpu host -smp 3 -cdrom ./linux/kubuntu-20.04-desktop-amd64.iso -boot d -soundhw hda -vga qxl -device virtio-serial-pci -device virtserialport,chardev=spicechannel0,name=com.redhat.spice.0 -chardev spicevmc,id=spicechannel0,name=vdagent -spice unix,addr=/tmp/vm_spice.socket,disable-ticketing
+
+for "remote" access:
+remote-viewer spice+unix:///tmp/vm_spice.socket
+
+
+
+Other tested combinations:
+-- virtio + SDL (GL on): works!
+-- virtio + GTK (GL on): does not work properly. The resolution is changed but window size is not so the guest screen will look like garbage.
+-- vmware: The initial Kubuntu setup screen is visible but booting does not progress to the desktop
+-- std + GTK: works!
+-- std + SDL: works!
+
+
+QEMU version: 5.1.0
+Guest: Kubuntu 20.04 64-bit (live) with 5.4.0-26 kernel; may occur with other guests as well
+Host: Arch Linux, with KDE desktop
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