Reported upstream as a gnome-shell bug initially at https://bugzilla.gnome.org/show_bug.cgi?id=771628
I can confirm that downgrading mutter and its support files and libs fixes the problem. In a picture such as gnome-shell 3.21.91-2 gnome-session 3.20.2-1 libwacom2 0.22-1 <<< ***OR 0.19-1, doesn't matter! xserver-xorg 1:7.7+16 xwayland 2:1.18.4-1 mutter 3.21.92-1 <<< *** gnome-shell segfaults Downgrading mutter (& its lib and -common package) to 3.21.91 fixes the segfaults, in both Xorg and Xwayland. mutter 3.21.91-2 <<< +++ no segfaults, all tablets OK Quick workaround for people having problems right now: # apt-get install mutter=3.21.91-2 mutter-common=3.21.91-2 libmutter0i=3.21.91-2 # apt-mark hold mutter mutter-common libmutter0i
