On Thu 02/05/2024 at 19:57, Stephen P. Molnar <s.mol...@sbcglobal.net> wrote:
> On 05/02/2024 12:54 PM, Gareth Evans wrote:
>>
>>
>>> On 2 May 2024, at 17:47, Gareth Evans <donots...@fastmail.fm> wrote:
>>>
>>> 
>>>
>>>> On 2 May 2024, at 15:43, Stephen P. Molnar <s.mol...@sbcglobal.net> 
>>>> wrote:
>>>>
>>>> I am running Bookworm and have implemented QEMU/KVM virt-manager. 
>>>> When I install a client I have been using virt-manager --> View 
>>>> -->Scale Display --> Always. However, now the 'Always ', the only 
>>>> option available is the default 'Only when Fullscreen'.
>>>
>>> Is Bookworm the VM client too?  With GUI?  Does this happen for all 
>>> clients, just one, or one type?
>>>
>>> Off the top of my head, I think the scale always option may disappear 
>>> if the guest display doesn't support it - I seem to recall VirtualBox 
>>> Guest Additions being required for this functionality for some guests 
>>> in VirtualBox (which I acknowledge you are not using, I'm just 
>>> saying...) so I don't think it's "straightforward" functionality
>>
>> What video protocol are you using?
>>
>> spice-vdagent is mentioned here a few comments down
>>
>> https://forum.manjaro.org/t/virt-manager-scale-display-not-working/138275/3
> I am using the procedure in 
> https://getlabsdone.com/install-windows-10-on-ubuntu-kvm/
>
> I am most interested in installing Windows 10, as there computation 
> chemistry windows apps that I want to use on Bookworm. However, the same 
> problem is resent for Linux clients that I've installed.

In 

virt-manager > Edit > Preferences > [console tab]

I see options for

Graphical console scaling [ Never / Fullscreen only / Always]
Resize guest with window [System default / Off / On]

This looks like it might just set defaults for options accessible from the VM 
view menu, but perhaps worth experimenting with?

The only Linux VM I have in virt-manager used the spice display manager by 
default.

If you are using spice too, this

https://stackoverflow.com/questions/41990600/virt-manager-guest-resize-not-working

suggests spice-guest-tools is required for Windows clients, with link to 
download page

Does any of that help?

Best wishes
Gareth

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