Acontece que o problema não estava com Spice
ou o hipervisor.
Depois de atualizar o kernel guest para o 4.16, a alteração da resolução funciona sem problemas.
Estou executando o KVM em um servidor Ubuntu 16.04. Estou tentando mudar a resolução de um vm executando um ambiente de desktop. para fazer isso eu uso o virt-viewer do remoto para conectar ao vm:
virt-viewer --connect qemu+ssh://user@host/system myvm
de lá eu uso xrandr para alterar a resolução:
xrandr --output Virtual-0 --mode 1920x1200
e, em seguida, o congelamento da interface do usuário, não consigo digitar ou clicar em nada.
do host eu posso ver isso dos logs
((null):3347): SpiceWorker-Warning **: red_worker.c:163:rendering_incorrect: rendering incorrect from now on: failed to get_drawable
repetido várias vezes.
Eu instalei o ssh-server na vm e enquanto o virt-viewer parece estar morto, minha conexão ssh está bem e eu posso fazer coisas do terminal. Talvez algo mais que possa ajudar. Esta configuração costumava funcionar quando eu estava executando um ambiente de desktop oh o host enquanto agora é apenas o servidor.
este é o dumpxml da vm
<domain type='kvm' id='3'>
<name>myvm</name>
<uuid>1a3e678f-9e8c-457f-9089-f5a0781307d7</uuid>
<memory unit='KiB'>2097152</memory>
<currentMemory unit='KiB'>2097152</currentMemory>
<vcpu placement='static'>2</vcpu>
<resource>
<partition>/machine</partition>
</resource>
<os>
<type arch='x86_64' machine='pc-i440fx-xenial'>hvm</type>
<boot dev='hd'/>
</os>
<features>
<acpi/>
<apic/>
</features>
<cpu mode='host-model'>
<model fallback='allow'/>
</cpu>
<clock offset='utc'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='no'/>
</clock>
<on_poweroff>destroy</on_poweroff>
<on_reboot>restart</on_reboot>
<on_crash>restart</on_crash>
<pm>
<suspend-to-mem enabled='no'/>
<suspend-to-disk enabled='no'/>
</pm>
<devices>
<emulator>/usr/bin/kvm-spice</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/var/lib/libvirt/images/myvm.qcow2'/>
<backingStore/>
<target dev='vda' bus='virtio'/>
<alias name='virtio-disk0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<backingStore/>
<target dev='hda' bus='ide'/>
<readonly/>
<alias name='ide0-0-0'/>
<address type='drive' controller='0' bus='0' target='0' unit='0'/>
</disk>
<controller type='usb' index='0' model='ich9-ehci1'>
<alias name='usb'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x7'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci1'>
<alias name='usb'/>
<master startport='0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0' multifunction='on'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci2'>
<alias name='usb'/>
<master startport='2'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x1'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci3'>
<alias name='usb'/>
<master startport='4'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x2'/>
</controller>
<controller type='pci' index='0' model='pci-root'>
<alias name='pci.0'/>
</controller>
<controller type='ide' index='0'>
<alias name='ide'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:ba:17:fd'/>
<source bridge='br0'/>
<target dev='vnet1'/>
<model type='virtio'/>
<alias name='net0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
</interface>
<serial type='pty'>
<source path='/dev/pts/2'/>
<target port='0'/>
<alias name='serial0'/>
</serial>
<console type='pty' tty='/dev/pts/2'>
<source path='/dev/pts/2'/>
<target type='serial' port='0'/>
<alias name='serial0'/>
</console>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<graphics type='vnc' port='5901' autoport='yes' listen='0.0.0.0'>
<listen type='address' address='0.0.0.0'/>
</graphics>
<video>
<model type='qxl' ram='262144' vram='131072' vgamem='131072' heads='1'>
<acceleration accel3d='yes' accel2d='yes'/>
</model>
<alias name='video0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
</video>
<memballoon model='virtio'>
<alias name='balloon0'/>
<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
</memballoon>
</devices>
<seclabel type='dynamic' model='apparmor' relabel='yes'>
<label>libvirt-1a3e678f-9e8c-457f-9089-f5a0781307d7</label>
<imagelabel>libvirt-1a3e678f-9e8c-457f-9089-f5a0781307d7</imagelabel>
</seclabel>
</domain>
Tags resolution qemu kvm spice libvirt