VGA output of own OS not displayed via VNC

[jbreu]

Operating system

WSL Ubuntu 22.04.2 LTS

Description

Hi folks,
I am trying to get my own OS written from scratch (https://github.com/jbreu/jos ) running with this project and dispayed in the browser. However it always get a black screen in the VNC view (either in Browser or with a native vnc client exposing the correct port). I guess it has something to do in how qemu inside docker renders the vga output and/or the fact I use Windows/WSL as host, but I cant get to it. One thing I noticed was that without adding --device=/dev/dri I dont have the cardX/renderD128 devices inside my qemu.

Running it natively with

qemu-system-x86_64.exe -s -S -cpu max -action panic=pause -no-reboot -monitor stdio -cdrom dist/x86_64/kernel.iso -display vnc=:0

works fine.

My OS uses plain qemu vga for outputting console/graphics.

Any hints?

Docker compose

docker run -it --rm --env=BOOT_MODE=legacy --env=CPU_CORES=4 --env=RAM_SIZE=4G --env=DISK_SIZE=16G --volume=/mnt/c/Users/Jakob/Documents/workspace/os-series/dist/x86_64/kernel.iso:/boot.iso -p 22 -p 5900:5900 -p 8006:8006 -p 5700:5700 --restart=no --runtime=runc --cap-add NET_ADMIN --env=DISPLAY=web --env=VGA=std --env=DEBUG=Y --device=/dev/kvm --device=/dev/dri -d qemux/qemu-docker:latest

Docker log

Booting `jos'

2024-10-20 17:28:05

Screenshots (optional)

No response