On Sun, Sep 03, 2017 at 11:46:57AM -0400, Ilia Mirkin wrote: > Commit df8dc97cd17 (drm/nouveau/kms/nv50: use drm core i2c-over-aux > algorithm) switched things over to the drm algo. Unfortunately it > generates address-only transactions. Prior to GF119, the hardware had > no support for such things, and GF119+ the nouveau code did not handle > these properly. > > The result of this bug is that EDID doesn't make it over for DP (and > eDP) screens, which in turn wreaks all sorts of havoc. There have been > lots of reports on IRC, a few on mailing lists, and also: > > https://bugs.freedesktop.org/show_bug.cgi?id=102528 > > Commit 13a86519202 (drm/nouveau/i2c/gf119-: add support for > address-only transactions) fixes the nouveau support for such > transactions on GF119+ and flips things back over to the custom algo > for earlier chips. Please include into the next v4.12.x release: Now queued up, thanks. greg k-h