UTM
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utmapp
When using multiple displays any non-"GPU Supported" display flash constantly
Describe the issue
My setup has both the laptop screen and an external monitor and I'd like to use both in the VM (with a Linux guest).
Both screens show up in the VM, but the display that is emulating a display card without GPU support (which is required, Qemu seems to only support 1 GPU supported display at a time) is constantly flashing. It's very distracting. This seems to only happen when the mouse cursor is moving on that screen, if it's still or present on the other screen it doesn't flash at all.
Configuration
- UTM Version: 4.4.5, from Homebrew
- macOS Version: Sonoma 14.2
- Mac Chip (Intel, M1, ...): M3
Debug log
alpinelinuxvm-log.log
Upload VM
config.plist.zip
https://github.com/utmapp/UTM/assets/1565836/aca2775b-b5d0-4941-a6bb-0fb3007aa3e6
It may be an issue with your selection of display devices. You have one virtio-ramfb-gl and one virtio-gpu-pci. Can you try making them both virtio-gpu-pci?
It seems to be the combination of a -gl device with one without. Changing them both to virtio-gpu-pci makes the screen not flash any more but suddenly Linux doesn't like it and shows no desktop on the primary screen (although it's detected in KDE's panel configuration) although it does on the second. Weird...