On Wed, Feb 26, 2020 at 10:16 AM Hans de Goede <hdegoede@xxxxxxxxxx> wrote: > > Hi Lyude and everyone else, > > Lyude I'm mailing you about this because you have done a lot of > work on DP MST, but if this rings a bell to anyone else feel > free to weigh in on this. Might be a duplicate of: https://gitlab.freedesktop.org/drm/amd/issues/1052 Alex > > I'm currently using a Lenovo X1 7th gen + a Lenovo TB3 gen 2 dock > as my daily rider for testing purposes. When 5.6-rc1 came out I > noticed that only 1 of the 2 1920x1080@60 monitors on the dock > lights up. > > There are no kernel errors in the logs, but mutter/gnome-shell says: > > gnome-shell[1316]: Failed to post KMS update: Page flip of 93 failed > > With 93 being the crtc-id of the crtc used for the monitor which is > displaying black. Since then I've waited for 5.6-rc3 hoping that a > fix was already queued up, but 5.6-rc3 still has this problem. > > gnome-shell does behave as if all monitors are connected, so the > monitor is seen, but we are failing to actually send any frames > to it. > > I've put a log collected with drm.debug=0x104 here: > https://fedorapeople.org/~jwrdegoede/drm-debug.log > > This message stands out as pointing to the likely cause of this problem: > > [ 3.309061] [drm:intel_dump_pipe_config [i915]] MST master transcoder: <invalid> > > Regards, > > Hans > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
