Package: gnome-shell Version: 41.0-2 I hadn't hooked my second monitor in a while, and now it's as described in the title: the mouse cursor is correctly displayed on it but all the rest is white with some garbage on the upper (about one mouse cursor high).
That's why I think the problem comes from the top of the stack (gnome- shell) rather than from below (nouveau), but I might be in error, so here are details: (1) The main "card" is Intel Corporation CoffeeLake-H GT2 [UHD Graphics 630], with kernel module i915. The second "card" is NVIDIA Corporation GP107M [GeForce GTX 1050 Mobile], with kernel module nouveau. (2) I think both physical screens are detected, since xrandr says: Screen 0: minimum 16 x 16, current 3840 x 1080, maximum 32767 x 32767 XWAYLAND0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 340mm x 190mm 1920x1080 60.05*+ XWAYLAND1 connected 1920x1080+1920+0 (normal left inverted right x axis y axis) 530mm x 300mm 1920x1080 143.88*+ Where should I have a look to find error messages and fix the issue? Cheers, J.Puydt