[Qemu-devel] [Bug 504368] Re: sdl window intermittently scales instead of resizing

[Michal Suchanek]

My window manager maximizes all windows. I am running kvm 0.14.

Initially the VM is displayed 1:1 in the top left corner leaving large
portion of the window black.  Resizing the window or rebooting the VM
causes the output to be scaled which is horrendous.

There are three issues here: there is no way to force the window to be
the size of the VM output nor is there a way to display the VM output
1:1 regardless of window size nor  is there any possibility to make the
VM output scale proportionally.

Pressing Ctrl+Alt+u definitely does not disable scaling for me although
it causes the VM output to disappear momentarily causing the window to
flash.

I guess setting window size  can be achieved with some WM hint (and
should be a command line option and possibly a option configurable from
the monitor). Obviously, not all outputs can set the hint and not all
WMs will respect it. However, setting the hint *and* resizing to the
desired size should give the correct size in most cases.
http://standards.freedesktop.org/wm-spec/wm-spec-latest.html#NORESIZE

The other issue is that scaling does not respect aspect ratio leading to
horrendous VM output. I don't think there is any use case for non-
proportional scaling.

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https://bugs.launchpad.net/bugs/504368

Title:
  sdl window intermittently scales instead of resizing

Status in QEMU:
  Triaged
Status in “qemu-kvm” package in Ubuntu:
  Incomplete

Bug description:
  Binary package hint: qemu-kvm

  Normally, the SDL output window for a VM resizes to match the VM's
  resolution.  However, intermittently the output is instead scaled
  within the window.  I can't seem to find any pattern to when the
  output is scaled versus when the window is resized.  I would prefer
  that the window be resized as needed to display the VM in a 1:1
  manner.

  ProblemType: Bug
  Architecture: amd64
  Date: Thu Jan  7 10:30:10 2010
  DistroRelease: Ubuntu 9.10
  InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release amd64 (20091027)
  KvmCmdLine:
   UID        PID  PPID  C    SZ   RSS PSR STIME TTY          TIME CMD
   root     27618     1 38 241752 804668 1 10:05 ?        00:09:39 /usr/bin/kvm 
-S -M pc-0.11 -cpu qemu32 -m 768 -smp 1 -name win2k3 -uuid 
da414aa0-f18a-7a02-3d1b-1dbf13137bc9 -monitor 
unix:/var/run/libvirt/qemu/win2k3.monitor,server,nowait -localtime -boot c 
-drive file=/media/qpc-devel/testing/win2k3/testing.ovl,if=ide,index=0,boot=on 
-drive 
file=/media/qpc-devel/testing/win2k3/../../isos/en_win_srv_2003_r2_standard_cd1.iso,if=ide,media=cdrom,index=2
 -net nic,macaddr=00:16:3e:d6:f5:60,vlan=0,model=ne2k_pci,name=ne2k_pci.0 -net 
tap,fd=18,vlan=0,name=tap.0 -serial pty -parallel none -usb -usbdevice tablet 
-vga cirrus
   root     28306     1 54 177732 545520 1 10:28 ?        00:00:49 /usr/bin/kvm 
-S -M pc-0.11 -cpu qemu32 -m 512 -smp 1 -name win2k -uuid 
153d6125-acb5-70bc-c7d2-bcbf87c5be86 -monitor 
unix:/var/run/libvirt/qemu/win2k.monitor,server,nowait -localtime -boot c 
-drive file=/media/qpc-devel/testing/win2k/testing.ovl,if=ide,index=0,boot=on 
-drive 
file=/media/qpc-devel/testing/win2k/../../isos/windows_2000.iso,if=ide,media=cdrom,index=2
 -net nic,macaddr=68:29:6b:13:50:c6,vlan=0,model=ne2k_pci,name=ne2k_pci.0 -net 
tap,fd=19,vlan=0,name=tap.0 -serial pty -parallel none -usb -usbdevice tablet 
-vga cirrus
  NonfreeKernelModules: nvidia
  Package: kvm 1:84+dfsg-0ubuntu16+0.11.0+0ubuntu6.3
  PccardctlIdent:
   Socket 0:
     no product info available
  PccardctlStatus:
   Socket 0:
     no card
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-2.6.31-16-generic 
root=UUID=30218f9a-6f90-4eab-9ba5-f54897e842cb ro quiet splash
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcVersionSignature: Ubuntu 2.6.31-16.53-generic
  SourcePackage: qemu-kvm
  Uname: Linux 2.6.31-16-generic x86_64
  dmi.bios.date: 02/20/2008
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 7LETB2WW (2.12 )
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvr7LETB2WW(2.12):bd02/20/2008:svnLENOVO:pn:pvrThinkPadT61p:rvnLENOVO:rn:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.version: ThinkPad T61p
  dmi.sys.vendor: LENOVO

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