I have Samsung Syncmaster 204Ts which worked fine with Ubuntu 10.04 using DVI connection. Since 10.10 the screen is blank with DVI connection and I get invalid EDID errors constantly.
Combining two solutions below I was able to get DVI working again:
I have Samsung Syncmaster 204Ts which worked fine with Ubuntu 10.04 using DVI connection. Since 10.10 the screen is blank with DVI connection and I get invalid EDID errors constantly.
Combining two solutions below I was able to get DVI working again:
#1: http:// lists.freedeskt op.org/ archives/ dri-devel/ 2011-January/ 006778. html (kernel patch + adding to kernel command line: "drm.edid_ strict= 0"). This change never got into official kernel (see the thread above).
#2: Disabling polling (message #43) with: echo 0 > /sys/module/ drm_kms_ helper/ parameters/ poll
With #1 I got DVI to work again, but I still got EDID errors every 10 s in log files. With #2 those EDID errors diapperead too.
I have to keep patching (if using this monitor) until this is solved somehow in the kernel.