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[Qemu-devel] qemu-1.2.2 black screen when the winxp guest change the res


From: zhou link
Subject: [Qemu-devel] qemu-1.2.2 black screen when the winxp guest change the resolution
Date: Tue, 29 Jan 2013 10:26:06 +0800

hello,  i  reproduce the problem:

when i use qemu-1.2.2 on  centos6.3  with spice-0.12.2,  run winxp guest like that:

qemu-system-x86_64 -localtime --enable-kvm -spice port=9999,disable-ticketing -m 2048 -smp 2 -vga qxl -drive file=.xp32_full_stable.qcow2 

the win32 xp  has install  the spice-guest-tool-0.3  and  the qxl driver works well.

when i  change the guest 's screen resolution(1024*768 to 1280*800),  the screen lost reponse  and black ,  so   i have to kill  the qemu-system-x86_64 process.

but when i  restart the guest os again,  i  found the screen has change to  1280*800, yes the new one.

then i run the guest without qxl support like that:

qemu-system-x86_64 -localtime --enable-kvm -spice port=9999,disable-ticketing -m 2048 -smp 2 -drive file=.xp32_full_stable.qcow2 

the problem doesn't occur again, change screen resolution ok,  though guest supports vga only.


then  i  install the  qemu-1.3.0,  and  run the same img file just like above with the same command:

qemu-system-x86_64 -localtime --enable-kvm -spice port=9999,disable-ticketing -m 2048 -smp 2 -vga qxl -drive file=.xp32_full_stable.qcow2 
  
well   the qemu-1.3.0  works smooth,  and the winxp guest  changes the  screen resolution successfull.

maybe  the qemu-1.2.2's qxl support has a bug ?


if anyone is intersting with the problem,  i can supply more info,  like logs or qcows img(but it is a little big guy),  thx very much.





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