[Virtualbox | Win 11 Host] Artefacts in Vivaldi UI with HWA

[DoctorG]

I run several Linuxes in Virtualbox 7.1.10 (Windows 11 Host).

In the past i used vivaldi:flags for OverideGPUBLocklist : Enabled and GPURasterisation: Disabled to get HWA active.
Worked all nice in 7.4 and 7.5 Snapshots before Chromium 138 core.

Debian 12 KDE Wayland or X11

Now in 7.5 Stable i get strange artefacts.

• some webpage looks like it has a darker region
• popup of Proton VPN rendering issue
  

Disable of HWA is no solution as i need it to test Vivaldi versions on these Linuxes.

Any cue how to change Linux graphics settings or Virtualbox config to get rid of this?

[npro]

@DoctorG you are asking basically for Virtualbocks for Winblows support ... wrong forum x2

[npro]

@DoctorG No issues with QEMU/KVM without any flags on my side (Debian 12 guest, X11)

[DoctorG]

@npro You happy one.

[npro]

@DoctorG Join the club, steps to follow: 1. host = Linux, 2. install QEMU/KVM

[DoctorG]

@npro I posted here because i thought that it could be a Linux guest'S GPU driver/config problem.

[DoctorG]

@npro said in [Virtualbox] Artefacts in UI:

install QEMU/KVM

I try first QEMU on my Windows workstation PC.

[DoctorG]

Funfact: no trouble on Debian 13 KDE.

[npro]

@DoctorG said in [Virtualbox] Artefacts in UI:

I try first QEMU on my Windows workstation PC.

I don't think that's a good idea as QEMU is primarily developed (& intended) for Linux, KVM is a Linux kernel module after all, performance on Winblows will suffer.

[npro]

@DoctorG said in [Virtualbox] Artefacts in UI:

@npro I posted here because i thought that it could be a Linux guest'S GPU driver/config problem.

Those GPU drivers are virtual ones coming from VBox, which you install from Windblows, I don't think it is a clean passthrough that you can compare with bare-metal anyway.

[DoctorG]

@npro OK. Was only a idea to solve broken VM.

[DoctorG]

@npro Yes, i know, it is a extra GPU driver.
But strangeness was, that it worked on some distributions with HWA and on some not.

From time to time VirtualBox is a ugly helper tool

The VB support/forum does not helped me much in the past.

[DoctorG]

As the effect is only on Debian 12.11 KDE Wayland/X11 i ignore these rendering issues as long as websites work.

I let this thread open.
Perhaps a Windows+Linux user knows more to tell me how to fix the rendering issue on VBox.