Bug 380040

Summary:	Can't get plasma (wayland) to start because of a fatal error
Product:	[Plasma] plasmashell	Reporter:	Munzir Taha <munzirtaha>
Component:	generic-wayland	Assignee:	Plasma Bugs List <plasma-bugs-null>
Status:	RESOLVED FIXED
Severity:	normal	CC:	munzirtaha, notuxius
Priority:	NOR
Version First Reported In:	5.9.5
Target Milestone:	1.0
Platform:	Arch Linux
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:
Attachments:	journalctl -ab

Description Munzir Taha 2017-05-20 20:23:44 UTC

Created attachment 105652 [details]
journalctl -ab

When I try to login via sddm, I get black screen. journalctl shows this error:

plasmashell[815]: The Wayland connection experienced a fatal error (Protocol error)

Tried a nested setup:
$ export $(dbus-launch)
$ kwin_wayland --xwayland
No backend specified through command line argument, trying auto resolution
kwin_core: choose config failed
kwin_core: Creating egl surface failed
kwin_core: Failed to initialize compositing, compositing disabled
kwin_core: The used windowing system requires compositing
kwin_core: We are going to quit KWin now as it is broken
Segmentation fault (core dumped)

My hardware is the HP Spectre 15" with intel/nvidia
> lspci -nn
00:02.0 VGA compatible controller [0300]: Intel Corporation Device [8086:5916] (rev 02)
00:13.0 Non-VGA unclassified device [0000]: Intel Corporation Device [8086:9d35] (rev 21)
01:00.0 3D controller [0302]: NVIDIA Corporation GM108M [GeForce 940MX] [10de:134d] (rev ff)

However, my nvidia is disabled as can be verified by:
> cat /proc/acpi/bbswitch 
0000:01:00.0 OFF


The full journalctl log is attached

Comment 1 Alexander Mentyu 2017-08-17 15:10:46 UTC

Maybe this article can help to investigate it further:
https://blog.martin-graesslin.com/blog/2016/07/why-does-kwin_wayland-not-start/