Bug 427493

Summary:	Kwin crashes after login with symbol lookup error
Product:	[KDE Neon] neon	Reporter:	Terces86
Component:	general	Assignee:	Neon Bugs <neon-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	major	CC:	fknghostile, hernan.hyper, jr, neon-bugs-null, roninhomc, sitter
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Neon
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Terces86 2020-10-09 16:45:17 UTC

SUMMARY
After todays update kwin can't launch and thus the user is starting on a black screen. Programs can be launched through KRunner or Terminal, but don't have any borders. All Panels are missing.

STEPS TO REPRODUCE
1. Update System
2. Restart
3. Login

OBSERVED RESULT
- Missing background
- programs can only be launched with KRunner or through terminal (they lack borders and can't be moved)
- no panels
- starting Kwin manually returns error: "kwin: symbol lookup error: /usr/lib/x86_64-linux-gnu/libkwin.so.5: undefined symbol: _ZN14KWaylandServer17XdgShellInterface14surfaceCreatedEPNS_24XdgShellSurfaceInterfaceE"

EXPECTED RESULT
- Boot PC
- Log into my account
- Use account as usual

SOFTWARE/OS VERSIONS
Linux/KDE Plasma: KDE neon 20.04 5.19
KDE Plasma Version: 5.19.5
KDE Frameworks Version: 5.74.0-0xneon+20.04+focal+buil12
Qt Version: ???

ADDITIONAL INFORMATION
There is also a thread in the forums of multiple users getting this error:
https://forum.kde.org/viewtopic.php?f=309&t=168189

Comment 1 Terces86 2020-10-09 17:40:24 UTC

In the forum-thread the user "markfergy" traced the error back to the "libkwaylandserver5" package. Downgrading the package solved  the issue:

"sudo apt-get install libkwaylandserver5=5.19.5-0xneon+20.04+focal+build10"

Comment 2 Hernan Schmidt 2020-10-09 18:10:02 UTC

I can confirm the reported bug and the solution proposed.

Comment 3 fknghostile 2020-10-09 19:12:08 UTC

Same problem here.

Comment 4 Christoph Feck 2020-10-10 05:06:28 UTC


*** This bug has been marked as a duplicate of bug 427498 ***

Comment 5 Roni 2020-10-14 00:01:00 UTC

The same here.
"sudo apt-get install libkwaylandserver5=5.19.5-0xneon+20.04+focal+build10" not work.
Error: E: Versão '5.19.5-0xneon+20.04+focal+build10' para 'libkwaylandserver5' não foi encontrada.

Comment 6 Roni 2020-10-14 00:41:45 UTC

After install kwin, solved to me. "sudo apt install kwin"