Windows Host Schrift bei 150% Skalierung kaum lesbar / unscharf

[gatemaster99]

Hallo,

ich habe einen neuen Laptop und eine bestehende Windows-VM von meinem alten übernommen.
Angeschlossen ist mein Laptop per USB-C Dock an einem 4K Monitor, genau wie mein alter Laptop.

Wenn ich jetzt 150% Skalierung (empfohlen) auswähle, dann ist die Schrift komplett unscharf.
Bei meinem alten Rechner war die Schrift sehr klar lesbar.

2021-12-20 12_33_12-2021-12-20 12_09_05-Win 11 [wird ausgeführt] - Oracle VM VirtualBox2.png (51.54 KiB) Viewed 19642 times

Ich habe schon alle erdenklichen Sachen geprüft, komme aber nicht weiter.
GuestAdditions sind installiert....
Cleartype optimierung....
Optimierungen in AMD / NVIDIA Software versucht....

Der neue Laptop hat eine NVIDIA GTX 3060 und eine AMD RADEON GRAPHICS eingebaut.
Der alte eine GTX1050 und eine Intel UHD.... Das ist der einzige Unterschied.

Alle NVIDIA Treiber (NVIDIA Studio) und AMD Radeon Treiber sind aktuell.
Ich habe auch mal versucht Virtualbox über die AMD GraKa laufen zu lassen. Kein Unterschied.
Gerade 150% Auflösung wäre ideal zum arbeiten.
Vielleicht hat jemand noch eine Idee / Tipp?

[scottgus1]

Only thing I know of is the DPI settings in Virtualbox icon's Properties, Compatibility tab. I have no idea what to change though. Compare between the old computer and new computer.

[gatemaster99]

Hi... it is all the same between both....
I also created a new VM with a clean Win 11 & also a Win 10 installation.
Same problem.

[scottgus1]

OK, thanks. We'll have to wait for someone else to suggest an idea to fix the problem.

One idea you might try is to set the DPI setting back to 100% inside the VM OS, then use the VM's Virtualbox Display Settings, Scale Factor to scale up the VM.

[gatemaster99]

Hi.... the dpi setting inside the VM (windows 11 guest) is set to 100%
If I set the dpi of my Win 11 guest to 150% everything is fine.
But this is not ideal for me. I often switch monitors, so I want to change 100% / 125% / 150% on the fly....

[scottgus1]

If I set the dpi of my Win 11 guest to 150% everything is fine.
But this is not ideal for me

There may not be a fix for 'ideal'.

Or it may be scriptable. I once had a command line program that could change the computer's screen size for a particular game, then change it back after the game was closed. Perhaps there is a series of command lines you can put in a batch file inside the VM OS to change the VM OS's scaling. Virtualbox does not contain any such commands. You'd have to web-search Microsoft channels for how to do this if it is possible.

How did this work:

set the DPI setting back to 100% inside the VM OS, then use the VM's Virtualbox Display Settings, Scale Factor to scale up the VM.

[gatemaster99]

The dpi setting inside the VM always was 100%.... I only changed it for testing....

[scottgus1]

OK, that's good. So how about this part?

use the VM's Virtualbox Display Settings, Scale Factor to scale up the VM

[gatemaster99]

actually I use:
Guest 100% dpi / Scaling by Virtualbox = 150%
In this setup everything is very blurry....


When I use:
Guest 150% dpi / Scaling by Virtualbox = 100%
It is much better, but it has some disadvantages => e.g. switchting to 100% needs logoff or restart / PDF Documents are not scaled.....

[scottgus1]

Guest 100% dpi / Scaling by Virtualbox = 150%
In this setup everything is very blurry....

Good, thanks for trying.

I have no further ideas. We'll have to wait for someone who has a 4K monitor to try some further suggestions.

[fth0]

You should avoid the scaling by VirtualBox, if you cannot use integer multiples. And even when using a Scale Factor of 200%, VirtualBox will only quadruple each pixel and not enhance the resolution. In combination with the subpixel rendering of the guest OS (e.g. Windows ClearType) it won't get pretty.