GNOME/Wayland desktop freezes when resizing Firefox window
Submitted by Stephan Bergmann @sbergmann
Assigned to Lyude Paul @lyudess
Link to original bug (#104222)
Description
On Fedora 27 GNOME/Wayland desktop, I can reliably reproduce the desktop freezing when grabbing the border of a Firefox window with the mouse and dragging to resize. (Where Firefox brings Xwayland into the mix, IIUC. The only way I found to make the machine responsive again is to ssh into it and kill -9 the Xwayland processes, which gets me back to the GNOME login screen.)
journalctl says:
Dec 12 11:24:42 alpha kernel: nouveau 0000:02:00.0: gr: TRAP ch 16 [003f49a000 Xwayland[27222]]
Dec 12 11:24:42 alpha kernel: nouveau 0000:02:00.0: gr: GPC0/TPC0/TEX: 80000049
Dec 12 11:24:42 alpha kernel: nouveau 0000:02:00.0: gr: GPC0/TPC1/TEX: 80000049
Dec 12 11:24:42 alpha kernel: nouveau 0000:02:00.0: fifo: read fault at 0001c7e000 engine 00 [PGRAPH] client 04 [GPC0/] reason 02 [PAGE_NOT_PRESENT] on channel 16 [003f49a000 Xwayland[27222]]
Dec 12 11:24:42 alpha kernel: nouveau 0000:02:00.0: fifo: gr engine fault on channel 16, recovering...
Dec 12 11:24:42 alpha kernel: nouveau 0000:02:00.0: Xwayland[27222]: channel 16 killed!
The GPU is "VGA compatible controller: NVIDIA Corporation GF108GL [Quadro 600] (rev a1)" according to lspci.
Reproducible with kernel 4.14.3-300.fc27.x86_64, but not reproducible with 4.13.13-300.fc27.x86_64.
Also not reproducible with neither (from a VT) running `weston --xwayland` nor `weston --use-pixman --xwayland`.