https://bugs.freedesktop.org/show_bug.cgi?id=109340
--- Comment #2 from Rafał Miłecki zajec5@gmail.com --- I've noticed that:
1) After connecting monitor to the docking station's DP output following outputs appear: DisplayPort-3, DisplayPort-4 and DisplayPort-5. 2) After disconnecting monitor from docking stating I can see: [drm] DM_MST: stopping TM on aconnector: 00000000651bd996 [id: 57] [drm] DM_MST: Disabling connector: 00000000e1b7686d [id: 90] [master: 00000000651bd996] [drm] DM_MST: Disabling connector: 0000000078869ed2 [id: 94] [master: 00000000651bd996] [drm] DM_MST: Disabling connector: 00000000af4e5879 [id: 98] [master: 00000000651bd996] 3) After disconnecting whole docking station I can still see DisplayPort-3, DisplayPort-4 and DisplayPort-5 in the "xrandr" output.
Is that expected? Is that a possible hint for some problem with output management that also causes the original problem?