On 2017-10-03 12:56, Jan Luehr wrote: > Hello folks, > > I've some trouble with multi-screen setups changing while logged in - ie > due to: > - a data projector is connected, disconnected or reconnected > - a docking station is docked / un-docked > > In all situations: > - xrander lists all screens correctly > - System Settings -> Display Monitoring shows the connected devices > correctly. > - Suspending / uns-uspending has no effect > - If switching to a text-console (CTRL+Alt+Fn) the console is shown on > all screens correctly. When switching back, the desktop is show for a > fraction of a second (buffer?) > > Problems occurring: > - New screens remain black (ie: Plugged in data projector remains black) > - Old screens are not detached (ie Desktop occupies non-existing > screens, menu bar is missing). > - All screens are black, the mouse pointer is shown, only. > > Misc: > - Restarting the xserver helps usually - the current layout is applied > correctly > - Deleting .local/share/applications/kscreen and the old > .kde-kscreen-directory has no effect > - Jessie was ok - all problems are regressions after updating to Stretch. > > Do you have any idea how to fix that ? > For the moment, I need to restart my session (Log-In / Log-Out), when > giving a talk or the connection to the data projector is lost for a > second during a talk. It is really annoying. :-( > > Thanks in advance, > Jan > >
What a coincidence. Same problem here between a Lenovo Skylake i915 laptop and a Benq device, with a HDMI connection on both sides. I am using stock Stretch, no upgrades to testing or experimental. This ruined a talk I gave yesterday evening. The audience was somewhat forgiving, but will be less so tomorrow in another setting. At best a slide would be visible after a few seconds for a second or two, disappear again, and if lucky, show up once or twice more for a few seconds before switching to the next slide. Sometimes the right half of the slide was visible on the left half of the screen. I thought it was the cable's fault, thought of trying another one later today. An urgent fix would be highly appreciated. Regards, Andreas
