On Tuesday 26 of March 2013 16:49:30 Daniel Vetter wrote:
On Tue, Mar 26, 2013 at 4:40 PM, Michal Srb msrb@suse.com wrote:
I have IBM POS machine (4852-570 Truman) that has internal monitor connected over display port. It reports to have 2 lanes, but only 1 lane works reliably. With 2 lanes used, the monitor sometimes doesn't turn on. It seems that this is hardware issue specific for this model.
From discussion that was around the 2514bc510d0c3aadcc5204056bb440fa36845147 commit I understand there are more machines that have similar problems. This option can be used to solve them.
It sounds like we need to start with a DPCD quirk database ... Ajax? -Daniel
Any update? DPCD of this monitor is 10 0a 82 40 00 00 01 00 02 00 00 00 10 01 00 by the way.
Is the i915.dp_limit_max_lane_count unacceptable even as temporary workaround?
Michal Srb