[fritsch]

GBM or is your bug fixed?

 GBM works well (only washed black.. will investigate) !!!

To test the bug I have to do a little reboot and see if keep a distance of hours without signal lost 

For washed out black, you need to force it to full range, which we did with xrandr before, therefore you need the proptest utility, give me the output of this one: https://www.dropbox.com/s/4kk1r9of4okqz8m/proptest?dl=0 (download it, chmod +x it and run it)