[libvirt-users] [help] How to modify the vgamem value ?
Dear everyone Do you know how to modify vgamem value in the .xml file ? such as :<video> <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1'/> // from instance-0000015e.xml <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/</video> I plan to increase the volume of vgamem , but it seems that always keep the original value ‘16384’. Was it limited by QEMU? or others？ Please tell me how I can I modify it ? it's better that help me to make a example for modifing the vgamem..... Thank you very much Best Regards .
Hi Luo, the vgamem is limited inside. Myself, I use QEMU 2.5/Virgil3D to expand the vgamem. May be someone have a better solution or an example to solve it. Best regards, Holger ================================================================= example: <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> . . <!-- Begin device declaration --> <devices> . . <!-- Videocard --> <video> <model type='virtio' heads='1'/> <alias name='video0'/> <address type='pci' domain='0x0000' bus='0x00' slot='0x0b' function='0x0'/> </video> . . . <!-- End device declaration --> </devices> <qemu:commandline> . . <qemu:arg value='-global'/> <qemu:arg value='VGA.vgamem_mb=128'/> <--- here is the size <qemu:arg value='-set'/> <qemu:arg value='device.video0.driver=virtio-vga'/> </qemu:commandline> ================================================================= Am 14.03.2016 um 09:20 schrieb hongzhen_luo@sina.com:
Dear everyone
Do you know how to modify vgamem value in the .xml file ? such as :
<video> <model type='qxl' ram='65536' vram='65536' vgamem='16384' heads='1'/> // from instance-0000015e.xml
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/
</video>
I plan to increase the volume of vgamem , but it seems that always keep the original value ‘16384’. Was it limited by QEMU? or others？ Please tell me how I can I modify it ? it's better that help me to make a example for modifing the vgamem.....
Thank you very much
Best Regards .
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On Mon, Mar 14, 2016 at 09:41:36AM +0100, Holger Schranz wrote:
Hi Luo,
the vgamem is limited inside. Myself, I use QEMU 2.5/Virgil3D to expand the vgamem.
It's not limited and can be modified inside the xml, the only limitation is that the value has to be a power of 2 and for QXL the value must be at least 1024. There is an exception, qemu can and in some cases updates the value internally, libvirt after the guest is started will get the actual value from qemu and update live XML. Pavel
Hi Pavel, I have to apologize. After your post I study the page again and I found your descrption. Best regards, Am 14.03.2016 um 10:20 schrieb Pavel Hrdina:
On Mon, Mar 14, 2016 at 09:41:36AM +0100, Holger Schranz wrote:
Hi Luo,
the vgamem is limited inside. Myself, I use QEMU 2.5/Virgil3D to expand the vgamem.
It's not limited and can be modified inside the xml, the only limitation is that the value has to be a power of 2 and for QXL the value must be at least 1024. There is an exception, qemu can and in some cases updates the value internally, libvirt after the guest is started will get the actual value from qemu and update live XML.
Pavel
participants (3)
-
Holger Schranz -
hongzhen_luo＠sina.com -
Pavel Hrdina