It’s not a question, it’s directly a solution.
I’m setting up new Arm64 RaspiOs (beta) with latest 5.10.y-78 kernel.
Testing on RPI4 and RPI3B+
While monitor is connected and i boot system, all works fine (at least with 128mb or more of GPU).
But when i boot without monitor attached remote GUI connection is almost unusable.
Tried different workarounds:
- Setting up: xserver-xorg-video-dummy (not good if monitor sometimes is attached sometimes not)
- sudo service lightdm stop
sudo /usr/NX/bin/nxserver –restart
But here is my top solution:
sudo nano /boot/config.txt
#Disable Hardware acceleration (may be useful only if you are sure to have always monitor attached)
#Enable DRM VC4 V3D driver
#Save and exit
sudo reboot now
After this all works perfectly with or without monitor attached
Also you may want to set defaut screen size in config.txt like:
# uncomment to force a console size. By default it will be display’s size minus
Hope it will be useful to someone in future.