SUMMARY Pressing the 'Super' (a.k.a. Windows) key while in rectangle-select mode will lock the user in the 'select region' mode. Pressing escape or enter will not have an effect STEPS TO REPRODUCE 1. Press Print key 2. Select 'Rectangular region' -> Take a new screenshot 3. Press the Super key OBSERVED RESULT The program is locked in the region-selection mode. It remains responsive to mouse actions, however keyboard inputs are ignored. Since neither escape not enter terminate the selection process, the system is effectively locked. The behavior is reproducable on my system. Fiddling with Ctrl+Alt+[F-key] seems to crash X when returning to the X session the bug was produced in. I also observed an uncalled system reboot. EXPECTED RESULT Anything from 'nothing' to 'the start menu opens'. Personally, I tried to take a screenshot of my start menu. SOFTWARE/OS VERSIONS Linux/KDE Plasma: Antergos/arch Kernel 4.19.2-arch1-1-ARCH KDE Plasma Version: 5.14.3 KDE Frameworks Version: 5.52.0 Qt Version: 5.11.2 ADDITIONAL INFORMATION n.a.
You can draw a box and double-click in it to escape when this happens. *** This bug has been marked as a duplicate of bug 374009 ***