2:45 p.m.
On Sat, Jul 22, 2017 at 03:03:06PM -0400, Alex wrote:
Hi,
I have a fedora25 system with a Windows10 host and would like to use
it for photoshop. However, it complains the video memory is too low.
I'm using the QXL driver and it appears to be limited to 256MB? I've
installed the Red Hat QXL driver in Windows.
What driver did you installed? There are two drivers, qxl and qxldod,
for windows 10 you need the qxldod and I would give it a try to use the
latest drivers [1], not the stable ones.
[1]
<https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/latest-v...
I have 4GB of memory allocated overall, and could allocate more if necessary.
How do I increase the available video memory? Photoshop reports that
it's detected less than 512MB and isn't operating properly.
When I view "Adapter Properties" is reports there is 2047 MB of
available graphics memory and
2047 MB Shared System Memory.
Attempts to modify with "virsh edit" the vram and other video-related
variables for the host have failed.
Included below is my qemu XML configuration. Any idea greatly appreciated.
<domain type='kvm'>
<name>alex-win10</name>
<uuid>337f9410-3286-4ef5-a3e8-8271e38ea1e5</uuid>
<memory unit='KiB'>4194304</memory>
<currentMemory unit='KiB'>4194304</currentMemory>
<vcpu placement='static'>2</vcpu>
<os>
<type arch='x86_64' machine='pc-i440fx-2.4'>hvm</type>
</os>
<features>
<acpi/>
<apic/>
<hyperv>
<relaxed state='on'/>
<vapic state='on'/>
<spinlocks state='on' retries='8191'/>
</hyperv>
<vmport state='off'/>
</features>
<cpu mode='host-model'>
<model fallback='allow'/>
</cpu>
Small tip, if you don't care about migration and this is just a guest
that will be used only on one host, I would go with:
<cpu mode='host-passthrough' check='none'>
<topology sockets='1' cores='2' threads='1'/>
</cpu>
The "host-passthrough" is a mode where it tries to present the CPU to
guest as close as possible to the host CPU. The topology configuration
is required for windows, because of licensing, it supports only 2
sockets, so for your configuration it works but if you would like to add
more vcpus to the guest, it could cause problems. Without this
configuration QEMU by default sets the number of sockets and each socket
has only 1 core and 1 thread.
<clock offset='localtime'>
<timer name='rtc' tickpolicy='catchup'/>
<timer name='pit' tickpolicy='delay'/>
<timer name='hpet' present='no'/>
<timer name='hypervclock' present='yes'/>
</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/qemu-kvm</emulator>
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2'/>
<source file='/var/lib/libvirt/images/alex-win10.qcow2'/>
<target dev='vda' bus='virtio'/>
<boot order='2'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x07'
function='0x0'/>
</disk>
<disk type='block' device='cdrom'>
<driver name='qemu' type='raw'/>
<source dev='/dev/sr0'/>
<target dev='hdb' bus='ide'/>
<readonly/>
<boot order='1'/>
<address type='drive' controller='0' bus='0'
target='0' unit='1'/>
</disk>
<disk type='file' device='cdrom'>
<driver name='qemu' type='raw'/>
<target dev='hdc' bus='ide'/>
<readonly/>
<address type='drive' controller='0' bus='1'
target='0' unit='0'/>
</disk>
<controller type='usb' index='0' model='ich9-ehci1'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x06'
function='0x7'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci1'>
<master startport='0'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x06'
function='0x0' multifunction='on'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci2'>
<master startport='2'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x06'
function='0x1'/>
</controller>
<controller type='usb' index='0' model='ich9-uhci3'>
<master startport='4'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x06'
function='0x2'/>
</controller>
<controller type='pci' index='0' model='pci-root'/>
<controller type='ide' index='0'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x01'
function='0x1'/>
</controller>
<controller type='virtio-serial' index='0'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x05'
function='0x0'/>
</controller>
<controller type='scsi' index='0'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x09'
function='0x0'/>
</controller>
<interface type='bridge'>
<mac address='52:54:00:52:6b:61'/>
<source bridge='br0'/>
<model type='rtl8139'/>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x03'
function='0x0'/>
</interface>
<serial type='pty'>
<target port='0'/>
</serial>
<console type='pty'>
<target type='serial' port='0'/>
</console>
<channel type='spicevmc'>
<target type='virtio' name='com.redhat.spice.0'/>
<address type='virtio-serial' controller='0' bus='0'
port='1'/>
</channel>
<input type='tablet' bus='usb'>
<address type='usb' bus='0' port='1'/>
</input>
<input type='mouse' bus='ps2'/>
<input type='keyboard' bus='ps2'/>
<graphics type='spice' autoport='yes'>
<listen type='address'/>
<image compression='off'/>
</graphics>
<sound model='ich6'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x04'
function='0x0'/>
</sound>
<video>
<model type='qxl' ram='65536' vram='65536'
vgamem='536870912'
heads='1' primary='yes'/>
So there are some limits for the memory configuration, if you start the
guest and run "virsh dumpxml $guestName" you will see how much memory is
actually configure. It should be this:
ram='524288' vram='65536' vgamem='262144'
I have a windows 10 guest installed and I installed a Photoshop 12.0 and
it starts without any warning.
You don't need to set the vgamem that large, 32M should be good enough,
the formula to calculate the vgamem is:
"screen_width * screen_height * 4"
And I would set the "ram" to 512M, however I'm not sure how this
actually affects the video memory seen by guest. The documentation is
really poor.
Anyway, the same configuration works for me so I don't know what else
could help you especially while I'm not able to reproduce the issue with
video memory.
Pavel
<address type='pci' domain='0x0000'
bus='0x00' slot='0x02'
function='0x0'/>
</video>
<redirdev bus='usb' type='spicevmc'>
<address type='usb' bus='0' port='2'/>
</redirdev>
<redirdev bus='usb' type='spicevmc'>
<address type='usb' bus='0' port='3'/>
</redirdev>
<memballoon model='virtio'>
<address type='pci' domain='0x0000' bus='0x00'
slot='0x08'
function='0x0'/>
</memballoon>
</devices>
</domain>