xorg running very slow problem
When i use qemu-kvm-87 or qemu-kvm-0.12.1.2 or snapshot (download from
http://git.kernel.org/?p=virt/kvm/qemu-kvm.git;a=summary),
xorg will running very slow (the screen refresh line by line), and i noticed the program "Xorg" will running very high cpu(>99% in top).
If i use qemu-kvm-86, xorg does not have this problem, and run just fine.
The modules is come from debian-2.6.32 kvm-intel.
The host is debian/x64/2.6.32.
I use this command to start kvm:
${KVM} -drive
file=${IMG},index=0,if=virtio,boot=on,cache=none,format=qcow2 \
-net nic,vlan=${NUM},model=virtio,macaddr=00:AA:BB:CC:DD:0${NUM} \
-net tap,vlan=${NUM},ifname="${iface}",script=/etc/kvm/kvm-ifup,downscript=/etc/kvm/kvm-ifdown \
-localtime -smp 2 \
-soundhw all \
-usb -usbdevice tablet \
-k en-us -monitor stdio \
-mem-path /hugepages \
-vga std -sdl \
-m 2048 -boot c
Anyone know how to solve this problem?
Please help, thank you.
Quoted 27 lines · John Wong
When i use qemu-kvm-87 or qemu-kvm-0.12.1.2 or snapshot (download from
http://git.kernel.org/?p=virt/kvm/qemu-kvm.git;a=summary),
xorg will running very slow (the screen refresh line by line), and i noticed the program "Xorg" will running very high cpu(>99% in top).If i use qemu-kvm-86, xorg does not have this problem, and run just fine.
The modules is come from debian-2.6.32 kvm-intel.
The host is debian/x64/2.6.32.
I use this command to start kvm:
${KVM} -drive file=${IMG},index=0,if=virtio,boot=on,cache=none,format=qcow2 \
(quoted diff) +0
-2-net nic,vlan=${NUM},model=virtio,macaddr=00:AA:BB:CC:DD:0${NUM} \ -nettap,vlan=${NUM},ifname="${iface}",script=/etc/kvm/kvm-ifup,downscript=/et c/kvm/kvm-ifdown \
(quoted diff) +0
-7-localtime -smp 2 \ -soundhw all \ -usb -usbdevice tablet \ -k en-us -monitor stdio \ -mem-path /hugepages \ -vga std -sdl \ -m 2048 -boot c
Quoted 3 lines
Anyone know how to solve this problem?
Please help, thank you.
What happens if you try the vmvga video adapter instead? I used to have issues with even the console being horrendously slow, and switching to vmvga improved performance.
Quoted 5 lines
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Signature · 2 lines
Thomas Fjellstrom [email protected]
Thomas Fjellstrom 提到:
Quoted 4 lines
What happens if you try the vmvga video adapter instead? I used to have issues with even the console being horrendously slow, and switching to vmvga improved performance.
Sorry, what is vmvga adapter?
How to switch it?
in guest OS/xorg or on host kvm command?
Quoted 9 lines · John Wong
Thomas Fjellstrom 提到:
Quoted 3 lines
What happens if you try the vmvga video adapter instead? I used to have issues with even the console being horrendously slow, and switching to vmvga improved performance.
Sorry, what is vmvga adapter?
How to switch it?
in guest OS/xorg or on host kvm command?
both, if you have an existing xorg.conf file in the guest.
in qemu you'd change '-vga std' to '-vga vmware' and change the xorg.conf in your guest (only if there is one with a driver specified) to use the vmware driver.
Quoted 5 lines
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Signature · 2 lines
Thomas Fjellstrom [email protected]
Thomas Fjellstrom 提到:
Quoted 5 lines
both, if you have an existing xorg.conf file in the guest.
in qemu you'd change '-vga std' to '-vga vmware' and change the xorg.conf in your guest (only if there is one with a driver specified) to use the vmware driver.
Yeah, after switch to use vmware, (both kvm command and xorg.conf), the problem is gone.
(use qemu-kvm.git snapshot)
Thank you, Thomas.
John Wong 提到:
Quoted 8 lines
Thomas Fjellstrom 提到:
Quoted 6 lines
both, if you have an existing xorg.conf file in the guest.
in qemu you'd change '-vga std' to '-vga vmware' and change the xorg.conf in your guest (only if there is one with a driver specified) to use the vmware driver.
Quoted 5 lines
Yeah, after switch to use vmware, (both kvm command and xorg.conf), the problem is gone.
(use qemu-kvm.git snapshot)Thank you, Thomas.
After switch to use vmware video adapter, i have another problem. the keyboard did not work, unless i need put "Ctrl+Alt" first, and i can not use "Ctrl+Alt+f" hotkey switch to fullscreen.
Please help, thank you.