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[Qemu-devel] [Bug 723871] Re: qemu-kvm-0.14.0 Aborts with -vga qxl


From: Boris Derzhavets
Subject: [Qemu-devel] [Bug 723871] Re: qemu-kvm-0.14.0 Aborts with -vga qxl
Date: Wed, 27 Apr 2011 14:19:50 -0000

@Serg,

I started getting execution denied errors in VirtManager or same in terminal 
after
virsh start W7 , when updated XML as follows 

<emulator>/usr/bin/kvm-spice</emulatror>
. .  .  .   .

<graphics type='spice' port='5930' autoport='no' listen='0.0.0.0'/>
<video>
<model type='qxl' vram='32768' heads='1'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</video>

When i attempted to fool libvirt and replace symlink kvm-spice or binary it's 
referencing
i got another execution denied error when spice-server started.
Fedora's libvirt doesn't have any problems of such kind ( even F14's libvirt in 
the very early times )

Install libvirt-0.8.8-4.fc15.src.rpm shows following patches in SOURCES
:-

libvirt-0.8.8-avoid-resetting-errors.patch  
libvirt-0.8.8-read-only-checks.patch
libvirt-0.8.8-kernel-boot-index.patch       
libvirt-0.8.8-threadsafe-libvirtd-error-reporting.patch


It's hard to understand what part of code ( in patches ) is responsible for 
spice-server
behaviour. Once again RH's support is pretty much desired.

-- 
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https://bugs.launchpad.net/bugs/723871

Title:
  qemu-kvm-0.14.0 Aborts with -vga qxl

Status in QEMU:
  Confirmed
Status in “qemu-kvm” package in Ubuntu:
  Fix Released

Bug description:
  Host CPU is Core i7 Q820.  KVM is from 2.6.35-gentoo-r5 kernel (x86_64).
  Host has spice-0.7.2 and spice-protocol-0.7.0.
  Guest is Windows XP SP3 with qxl driver 0.6.1, virtio-serial 1.1.6 and 
vdagent 0.6.3.

  qemu-kvm is started like so:
  qemu-system-x86_64 -cpu host -enable-kvm -pidfile /home/rick/qemu/hds/wxp.pid 
-drive 
file=/home/rick/qemu/hds/wxp.raw,if=virtio,media=disk,aio=native,snapshot=on -m 
768 -name WinXP -net nic,model=virtio -net user -localtime -usb -vga qxl 
-device virtio-serial -chardev spicevmc,name=vdagent,id=vdagent -device 
virtserialport,chardev=vdagent,name=com.redhat.spice.0 -spice 
port=1234,disable-ticketing -monitor stdio
  and crashes with:
  qemu-system-x86_64: /home/rick/qemu/src/qemu-kvm-0.14.0/qemu-kvm.c:1724: 
kvm_mutex_unlock: Assertion `!cpu_single_env' failed.
  Aborted

  If I use -no-kvm, it works fine.  If I use -vga std, it works fine.
  -enable-kvm and -vga qxl crashes.



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