[Qemu-devel] [Bug 1425597] Re: moving window + changing screen resolution = bug

[Askar Safin]

The bug is not present in Qemu 2.12 (version reported by dpkg: qemu-
system-x86 1:2.12+dfsg-1+b1). There is similar minor bug instead. The
new bug doesn't harm me and I am not even sure is this a bug.

So, this is info about new minor bug.

Host is Debian Sid installed today (23 May MSK) with mentioned Qemu
2.12. I run Qemu in X using:

# qemu-system-x86_64 -m 1024 -daemonize -snapshot -drive
file=/dev/sda,format=raw,cache=none -kernel /boot/vmlinuz* -initrd
/boot/initrd* -append root=/dev/sda

Then I started to move Qemu window using mouse. I kept Qemu window
catched by my mouse while guest OS boot. At some moment guest OS (Linux)
switched from text mode to framebuffer. Internal screen resolution
changed, but Qemu window didn't change its size (I kept moving Qemu
window all this time), but likely window content didn't scale (this is
as opposed to 3d30395f [3d30395f7fb3315e4ecf0de4e48790e1326bbd47]
behavior, 3d30395f scaled window content). So text in window remain
concrete (not fluid, as opposed to 3d30395f). Then I tried to resize
Qemu window and window size imidiately became normal, i. e. it started
to fit content.

All this is acceptable for me. I. e. I see this is nothing wrong when
Qemu cannot change its window size when I move Qemu window

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https://bugs.launchpad.net/bugs/1425597

Title:
  moving window + changing screen resolution = bug

Status in QEMU:
  Incomplete

Bug description:
  Steps to reproduce:
  1. Run qemu (sdl)
  2. Start moving the window
  3. At that moment the virtualized OS should change its screen resolution (for 
example, when switching from initial qemu screen to grub)

  What I see:
  Window size doesn't change, but internal screen resolution changes, so, image 
scale stops to be 1:1, now I see virtualized OS in wrong scale.

  What I expected to see:
  Window size changes so, that it keeps synchronized with internal resolution 
(as usual)

  This bug preserves at lastest git version at the moment, i. e.
  3d30395f7fb3315e4ecf0de4e48790e1326bbd47

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