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#1 2024-04-02 21:45:45

Leprotto
Member
Registered: 2023-07-07
Posts: 12

[SOLVED] Since Plasma 6 update kscreen_locker greeter...

... keeps randomly crashing.

Forgive me if this issue had been already answered, couldn't find it.
The only relevant information i have found in journald log is this:

 apr 02 23:19:10 ArchPC kwin_wayland_wrapper[865]: not a valid new object id (2), message get_registry(n)
apr 02 23:19:10 ArchPC kwin_wayland_wrapper[865]: error in client communication (pid 865)
apr 02 23:19:10 ArchPC kwin_wayland_wrapper[5106]: wl_display@1: error 1: invalid arguments for wl_display@1.get_registry
apr 02 23:19:10 ArchPC kscreenlocker_greet[5106]: qt.qpa.wayland: Loading shell integration failed.
apr 02 23:19:10 ArchPC kscreenlocker_greet[5106]: qt.qpa.wayland: Attempted to load the following shells QList("layer-shell")
apr 02 23:19:10 ArchPC kscreenlocker_greet[5106]: qt.qpa.plugin: Could not load the Qt platform plugin "wayland" in "" even though it was found.
apr 02 23:19:10 ArchPC kscreenlocker_greet[5106]: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                                                  
                                                  Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vkkhrdisplay, vnc, xcb, wayland-egl, wayland.

Last edited by Leprotto (2024-04-14 14:19:23)

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#2 2024-04-03 08:14:07

seth
Member
Registered: 2012-09-03
Posts: 51,132

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

Please use [code][/code] tags, not "quote" tags. Edit your post in this regard.

https://bbs.archlinux.org/viewtopic.php … 6#p2153976 - do you use kde-unstable?

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#3 2024-04-03 09:15:47

Leprotto
Member
Registered: 2023-07-07
Posts: 12

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

seth wrote:

Please use [code][/code] tags, not "quote" tags. Edit your post in this regard.

https://bbs.archlinux.org/viewtopic.php … 6#p2153976 - do you use kde-unstable?

No i switched back to stable since 5.27

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#4 2024-04-03 13:19:09

seth
Member
Registered: 2012-09-03
Posts: 51,132

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

https://bugs.kde.org/show_bug.cgi?id=468975
Do you have an external monitor attached?

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#5 2024-04-03 19:17:40

Leprotto
Member
Registered: 2023-07-07
Posts: 12

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

seth wrote:

https://bugs.kde.org/show_bug.cgi?id=468975
Do you have an external monitor attached?

It's a PC desktop, but the hint to rebuild layer-shell-qt won't hurt i guess.
I was wondering if an external plugin like wallpaper-engine-kde could cause that issue too.

Last edited by Leprotto (2024-04-03 19:29:35)

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#6 2024-04-03 22:44:19

seth
Member
Registered: 2012-09-03
Posts: 51,132

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

I don't think youll have to re-compile anything there, NG probably builds KDE out of git.

The upstream bug smells more like (possibly) DPMS turns off the monitor, it powers down and unregisters, that leaves you w/ a 0x0 sized desktop and the screenlocker dies over that.
A coredump would probably be useful, https://wiki.archlinux.org/title/Core_d … _core_dump

To mitigate this you could try to disable DPMS (probably in KDE's powersaving settings; "xset -dpms" will likely not work w/ KDE/wayland.

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#7 2024-04-04 19:56:36

Leprotto
Member
Registered: 2023-07-07
Posts: 12

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

seth wrote:

I don't think youll have to re-compile anything there, NG probably builds KDE out of git.

The upstream bug smells more like (possibly) DPMS turns off the monitor, it powers down and unregisters, that leaves you w/ a 0x0 sized desktop and the screenlocker dies over that.
A coredump would probably be useful, https://wiki.archlinux.org/title/Core_d … _core_dump

To mitigate this you could try to disable DPMS (probably in KDE's powersaving settings; "xset -dpms" will likely not work w/ KDE/wayland.

Coredump of what?

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#8 2024-04-04 20:06:50

seth
Member
Registered: 2012-09-03
Posts: 51,132

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

From the upstream bug kscreenlocker crashed and it's you immediate problem, so I'd look for that.

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#9 2024-04-06 12:38:43

Leprotto
Member
Registered: 2023-07-07
Posts: 12

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

Today it crashed again. I tried to check the core dump but it seems the aren't for that process.

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#10 2024-04-06 15:11:54

seth
Member
Registered: 2012-09-03
Posts: 51,132

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

What coredumps do you have?
Please post your complete system journal for the boot:

sudo journalctl -b | curl -F 'file=@-' 0x0.st

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#11 2024-04-06 17:33:50

Leprotto
Member
Registered: 2023-07-07
Posts: 12

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

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#12 2024-04-06 20:41:07

seth
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Registered: 2012-09-03
Posts: 51,132

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

apr 06 13:21:47 ArchPC kernel: Thread (pooled)[2749]: segfault at 7ba5a2200000 ip 00007ba5b476fe28 sp 00007ba58adff500 error 4 in libpcre2-16.so.0.12.0[7ba5b4756000+62000] likely on CPU 3 (core 3, socket 0)
apr 06 13:21:47 ArchPC kernel: Code: 51 07 00 0f 1f 80 00 00 00 00 48 03 41 20 48 89 cf 48 89 41 20 48 89 44 01 08 48 8d 0c 07 48 83 39 00 75 c9 66 0f 1f 44 00 00 <48> 8b 71 10 48 03 41 20 48 89 47 20 48 85 f6 74 08 4c 8b 41 18 4c
apr 06 13:21:47 ArchPC kwin_wayland_wrapper[874]: not a valid new object id (2), message get_registry(n)
apr 06 13:21:47 ArchPC kwin_wayland_wrapper[874]: error in client communication (pid 874)
apr 06 13:21:47 ArchPC kwin_wayland_wrapper[2760]: wl_display@1: error 1: invalid arguments for wl_display@1.get_registry
apr 06 13:21:47 ArchPC kscreenlocker_greet[2760]: qt.qpa.wayland: Loading shell integration failed.
apr 06 13:21:47 ArchPC kscreenlocker_greet[2760]: qt.qpa.wayland: Attempted to load the following shells QList("layer-shell")
apr 06 13:21:47 ArchPC kscreenlocker_greet[2760]: qt.qpa.plugin: Could not load the Qt platform plugin "wayland" in "" even though it was found.
apr 06 13:21:47 ArchPC kscreenlocker_greet[2760]: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                                                  
                                                  Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vkkhrdisplay, vnc, xcb, wayland-egl, wayland.

The most important line is the first one, though

apr 06 13:16:33 ArchPC kernel: Linux version 6.8.2-zen2-1-zen (linux-zen@archlinux) (gcc (GCC) 13.2.1 20230801, GNU ld (GNU Binutils) 2.42.0) #1 ZEN SMP PREEMPT_DYNAMIC Thu, 28 Mar 2024 17:06:20 +0000

and no SIGILL anywhere, so unlikely https://bbs.archlinux.org/viewtopic.php?id=293869 but possibly https://gitlab.archlinux.org/archlinux/ … e2c75d5142

pcre2 10.43-3 is still in core-testing - read https://wiki.archlinux.org/title/Offici … positories if you consider to activate that, otherwise just wait a couple of days.

There's also a ton of lsof crashes later, looks gamemod related but likely irrelevant.

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#13 2024-04-07 00:02:50

Leprotto
Member
Registered: 2023-07-07
Posts: 12

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

seth wrote:
apr 06 13:21:47 ArchPC kernel: Thread (pooled)[2749]: segfault at 7ba5a2200000 ip 00007ba5b476fe28 sp 00007ba58adff500 error 4 in libpcre2-16.so.0.12.0[7ba5b4756000+62000] likely on CPU 3 (core 3, socket 0)
apr 06 13:21:47 ArchPC kernel: Code: 51 07 00 0f 1f 80 00 00 00 00 48 03 41 20 48 89 cf 48 89 41 20 48 89 44 01 08 48 8d 0c 07 48 83 39 00 75 c9 66 0f 1f 44 00 00 <48> 8b 71 10 48 03 41 20 48 89 47 20 48 85 f6 74 08 4c 8b 41 18 4c
apr 06 13:21:47 ArchPC kwin_wayland_wrapper[874]: not a valid new object id (2), message get_registry(n)
apr 06 13:21:47 ArchPC kwin_wayland_wrapper[874]: error in client communication (pid 874)
apr 06 13:21:47 ArchPC kwin_wayland_wrapper[2760]: wl_display@1: error 1: invalid arguments for wl_display@1.get_registry
apr 06 13:21:47 ArchPC kscreenlocker_greet[2760]: qt.qpa.wayland: Loading shell integration failed.
apr 06 13:21:47 ArchPC kscreenlocker_greet[2760]: qt.qpa.wayland: Attempted to load the following shells QList("layer-shell")
apr 06 13:21:47 ArchPC kscreenlocker_greet[2760]: qt.qpa.plugin: Could not load the Qt platform plugin "wayland" in "" even though it was found.
apr 06 13:21:47 ArchPC kscreenlocker_greet[2760]: This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.
                                                  
                                                  Available platform plugins are: eglfs, linuxfb, minimal, minimalegl, offscreen, vkkhrdisplay, vnc, xcb, wayland-egl, wayland.

The most important line is the first one, though

apr 06 13:16:33 ArchPC kernel: Linux version 6.8.2-zen2-1-zen (linux-zen@archlinux) (gcc (GCC) 13.2.1 20230801, GNU ld (GNU Binutils) 2.42.0) #1 ZEN SMP PREEMPT_DYNAMIC Thu, 28 Mar 2024 17:06:20 +0000

and no SIGILL anywhere, so unlikely https://bbs.archlinux.org/viewtopic.php?id=293869 but possibly https://gitlab.archlinux.org/archlinux/ … e2c75d5142

pcre2 10.43-3 is still in core-testing - read https://wiki.archlinux.org/title/Offici … positories if you consider to activate that, otherwise just wait a couple of days.

There's also a ton of lsof crashes later, looks gamemod related but likely irrelevant.

Yes lsof crashes are gamemode related indeed.

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#14 2024-04-07 20:58:00

Leprotto
Member
Registered: 2023-07-07
Posts: 12

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

Now libpcre2 got updated and i get no more

ArchPC kernel: traps: Thread (pooled)[3519] general protection fault ip:7f507436fe3d sp:7f503f3ff410 error:0 in libpcre2-16.so.0.12.0[7f5074356000+62000]

in the journal. I hope the issue has been fixed now.

Last edited by Leprotto (2024-04-07 20:58:15)

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#15 2024-04-07 21:01:26

seth
Member
Registered: 2012-09-03
Posts: 51,132

Re: [SOLVED] Since Plasma 6 update kscreen_locker greeter...

In case it turns out to be stable please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.

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