Bug 18954

Summary:	KWin dependencies for kwin_wayland
Product:	Mageia	Reporter:	Davide Nifosi <ita84>
Component:	RPM Packages	Assignee:	Nicolas Lécureuil <mageia>
Status:	RESOLVED FIXED	QA Contact:
Severity:	minor
Priority:	Normal	CC:	marja11, ottoleipala1
Version:	Cauldron
Target Milestone:	---
Hardware:	All
OS:	Linux
Whiteboard:
Source RPM:	kwin-5.7.1-2.mga6.src.rpm	CVE:
Status comment:

Description Davide Nifosi 2016-07-16 08:32:31 CEST

Description of problem:

Currently trying to launch kwin_wayland (inside X11) fails because it cannot find the Qt platform plugin. Installing the package qtwayland5 solves the problem and makes kwin_wayland start. The qtwayland5 package should be suggested by kwin.

Note that launching kwin_wayland in DRM mode still fails with "FATAL ERROR: could not find a backend". On Graesslin's blog post

https://blog.martin-graesslin.com/blog/2016/07/why-does-kwin_wayland-not-start/

it says the platform/backend plugin is missing, but I don't know in which package it could be

Version-Release number of selected component (if applicable): 5.7.1-2

How reproducible: always

Steps to Reproduce:
1. in a virtual terminal, enter:
   export $(dbus-launch)
   kwin_wayland --xwayland
2. this should open a blank kwin_wayland window; instead, without the qtwayland5 package installed, it will exit with the following error message

    This application failed to start because it could not find or load the Qt platform plugin âwaylandâin ââ.

    Available platform plugins are: wayland-org.kde.kwin.qpa, eglfs, linuxfb, minimal, minimalegl, offscreen, xcb.

    Reinstalling the application may fix this problem.

Marja Van Waes 2016-07-16 08:51:46 CEST

CC: (none) => marja11
Assignee: bugsquad => mageia

Comment 1 Nicolas Lécureuil 2016-07-16 11:05:36 CEST

Please test next kwin package.

Comment 2 Davide Nifosi 2016-07-16 16:14:52 CEST

Just installed after manually removing qtwayland5, and now the dependency is installed automatically, so now it's ok.

Regarding the missing DRM backend, I see that the only available Wayland backends are Virtual, X11 and Wayland (nested, I guess); supposedly the missing one is the file KWinWaylandDrmBackend.so, which I didn't find anywhere with urpmf. Does it have another name, or is it not built at all?

Regardless, since the Plasma Wayland session isn't supposed to be in Mageia 6, it's fine if the DRM backend isn't yet available; but if it's just a build mistake or some other oversight, I'd like to have that as well

Comment 3 Nicolas Lécureuil 2016-07-16 17:27:15 CEST

drm backend should be available on next kwin rpm.

Comment 4 Davide Nifosi 2016-07-16 21:03:34 CEST

Thanks, but the backend is still missing.

$ ls /usr/lib64/qt5/plugins/org.kde.kwin.waylandbackends
KWinWaylandVirtualBackend.so*
KWinWaylandWaylandBackend.so*
KWinWaylandX11Backend.so*

Comment 5 Nicolas Lécureuil 2016-07-17 00:09:08 CEST

you should have /usr/lib64/qt5/plugins/org.kde.kwin.waylandbackends/KWinWaylandDrmBackend.so

in the new kwin rpm.

Comment 6 Otto Leipälä 2016-07-17 01:11:45 CEST

Don't upgrade your system,neoclust you breaked kwin with added kdecoration to requires while it don't exist in Cauldron.

A requested package cannot be installed:
kwin-5.7.1-5.mga6.x86_64 (due to unsatisfied kdecoration)

CC: (none) => ozkyster

Comment 7 Nicolas Lécureuil 2016-07-17 01:34:31 CEST

A new rpm is on the way.

Comment 8 Davide Nifosi 2016-07-17 08:21:02 CEST

Now it works! Thanks a lot for your work!

Status: NEW => RESOLVED
Resolution: (none) => FIXED

Comment 9 Otto Leipälä 2016-07-17 11:46:19 CEST

Thanks neoclust now it works.