Comment 20 for bug 1846374

Still present in the nvidia-graphics-drivers-440 package, sigh.

To reproduce, it's still as simple as "Start playing a video with VLC in user #1, switch to user #2 for a couple of seconds, switch back to user #2 to see a black screen in VLC and hundreds of megabytes of error messages in the logs". It still doesn't happen with VLC in a PC with an AMD card doing the graphics acceleration.

Syslog:

Apr 19 12:21:14 punch org.mate.panel.applet.MateMenuAppletFactory[5505]: [00007f6ead8e1730] vdpau_chroma filter error: video mixer features failure: An invalid handle value was provided.
Apr 19 12:21:14 punch org.mate.panel.applet.MateMenuAppletFactory[5505]: [00007f6ead8e1730] vdpau_chroma filter error: video mixer attributes failure: An invalid handle value was provided.

(those two repeated at least 90,000 times a second)

Apr 19 12:21:14 punch org.mate.panel.applet.MateMenuAppletFactory[5505]: [00007f6ead8e1730] vdpau_chroma filter error: video mixer rendering failure: An invalid handle value was provided.
Apr 19 12:21:14 punch org.mate.panel.applet.MateMenuAppletFactory[5505]: video surface destruction failure: An invalid handle value was provided.
Apr 19 12:21:14 punch org.mate.panel.applet.MateMenuAppletFactory[5505]: message repeated 3 times: [ video surface destruction failure: An invalid handle value was provided.]
Apr 19 12:21:14 punch org.mate.panel.applet.MateMenuAppletFactory[5505]: [00007f6ead8e1730] vdpau_chroma filter error: video mixer features failure: An invalid handle value was provided.
Apr 19 12:21:14 punch org.mate.panel.applet.MateMenuAppletFactory[5505]: [00007f6ead8e1730] vdpau_chroma filter error: video mixer attributes failure: An invalid handle value was provided.
Apr 19 12:21:14 punch org.mate.panel.applet.MateMenuAppletFactory[5505]: [00007f6ead8e1730] vdpau_chroma filter error: video mixer rendering failure: An invalid handle value was provided.
Apr 19 12:21:14 punch org.mate.panel.applet.MateMenuAppletFactory[5505]: video surface destruction failure: An invalid handle value was provided.
Apr 19 12:21:14 punch kernel: [ 842.264228] show_signal_msg: 40 callbacks suppressed
Apr 19 12:21:14 punch kernel: [ 842.264230] vlc[5545]: segfault at 8c ip 00007f6ea7908be0 sp 00007f6ea991f338 error 4 in libnvidia-glcore.so.440.64[7f6ea6a2a000+12de000]
Apr 19 12:21:14 punch kernel: [ 842.264236] Code: fa ff 48 8b 05 c1 50 e0 00 48 83 c0 10 48 89 45 00 48 8b 5c 24 08 48 8b 6c 24 10 48 83 c4 18 c3 90 90 90 90 90 90 90 90 90 90 <66> 83 bf 8c 00 00 00 00 b8 01 00 00 00 75 20 30 c0 f6 87 8a 00 00
Apr 19 12:21:14 punch systemd[1]: Starting Process error reports when automatic reporting is enabled...
Apr 19 12:21:18 punch whoopsie[1727]: [12:21:18] Parsing /var/crash/_usr_bin_vlc.1000.crash.
Apr 19 12:21:18 punch whoopsie[1727]: [12:21:18] Uploading /var/crash/_usr_bin_vlc.1000.crash.