Hi, does it work with some video modes, or none of them? Can you give me the edid of your hdmi display? Either "xrandr --verbose" output or the Xorg log? And the syslog when booting with drm.debug=1 at the kernel command line. I think "cat /var/log/syslog | grep drm" for the lines which contain "drm" would be enough. These EDID errors also happened before, right? thanks, -mario