[Bug 1906185] [NEW] Guest display resolution cannot be changed when using certain graphics/interface combinations

[Bug 1906185] [NEW] Guest display resolution cannot be changed when using certain graphics/interface combinations

[johannes]

Public bug reported:

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

** Affects: qemu
     Importance: Undecided
         Status: New


** Tags: graphics resolution

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1906185

Title:
  Guest display resolution cannot be changed when using certain
  graphics/interface combinations

Status in QEMU:
  New

Bug description:
  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

To manage notifications about this bug go to:
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[Bug 1906185] Re: Guest display resolution cannot be changed when using certain graphics/interface combinations

[Thomas Huth]

The QEMU project is currently moving its bug tracking to another system.
For this we need to know which bugs are still valid and which could be
closed already. Thus we are setting the bug state to "Incomplete" now.

If the bug has already been fixed in the latest upstream version of QEMU,
then please close this ticket as "Fix released".

If it is not fixed yet and you think that this bug report here is still
valid, then you have two options:

1) If you already have an account on gitlab.com, please open a new ticket
for this problem in our new tracker here:

    https://gitlab.com/qemu-project/qemu/-/issues

and then close this ticket here on Launchpad (or let it expire auto-
matically after 60 days). Please mention the URL of this bug ticket on
Launchpad in the new ticket on GitLab.

2) If you don't have an account on gitlab.com and don't intend to get
one, but still would like to keep this ticket opened, then please switch
the state back to "New" or "Confirmed" within the next 60 days (other-
wise it will get closed as "Expired"). We will then eventually migrate
the ticket automatically to the new system (but you won't be the reporter
of the bug in the new system and thus you won't get notified on changes
anymore).

Thank you and sorry for the inconvenience.


** Changed in: qemu
       Status: New => Incomplete

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1906185

Title:
  Guest display resolution cannot be changed when using certain
  graphics/interface combinations

Status in QEMU:
  Incomplete

Bug description:
  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

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1906185/+subscriptions

[Bug 1906185] Re: Guest display resolution cannot be changed when using certain graphics/interface combinations

[Launchpad Bug Tracker]

[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1906185

Title:
  Guest display resolution cannot be changed when using certain
  graphics/interface combinations

Status in QEMU:
  Expired

Bug description:
  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

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1906185/+subscriptions