[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Benjamin Smith]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #52 from Benjamin Smith  ---
(In reply to Nate Graham from comment #50)
> It's (hopefully, supposedly) fixed in Plasma 5.16.3. Are you using an older
> version than that, or a newer version?

I am on Plasma 5.17.4 from Manjaro. I can post the core dumps from my system
journal when I get home, if that will help.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Patrick Silva]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #51 from Patrick Silva  ---
maybe you were affected by already fixed bug 413637

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #50 from Nate Graham  ---
It's (hopefully, supposedly) fixed in Plasma 5.16.3. Are you using an older
version than that, or a newer version?

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Benjamin Smith]

https://bugs.kde.org/show_bug.cgi?id=372789

Benjamin Smith  changed:

   What|Removed |Added

 CC||bsmith7...@gmail.com

--- Comment #49 from Benjamin Smith  ---
I just had this happen last night when logging out from a Plasma Wayland
session.  Therefore, it's not fixed.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=372789

Nate Graham  changed:

   What|Removed |Added

   Version Fixed In||5.16.3

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[mthw0]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #48 from mthw0  ---
(In reply to Patrick Silva from comment #47)
> This patch was already applied to Arch Linux.
> 
> https://git.archlinux.org/svntogit/packages.git/commit/trunk?h=packages/
> kwayland-integration=549c4b9b13365ce65c7bedbf6e4805d43aae099d
> 
> But unfortunately the problem persists.
> I can reproduce following these steps:
> open system settings > "Connections" kcm
> close system settings
> try to do logout
> logout fails with a black screen
> 
> Operating System: Arch Linux 
> KDE Plasma Version: 5.16.2
> KDE Frameworks Version: 5.59.0
> Qt Version: 5.12.4

I tried the steps you mentioned, but I failed to reproduce this. It didn't
freeze a single time. Although it is true that I have built
kwayland-integration myself (including dependencies) even before it was
available on Arch.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Patrick Silva]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #47 from Patrick Silva  ---
This patch was already applied to Arch Linux.

https://git.archlinux.org/svntogit/packages.git/commit/trunk?h=packages/kwayland-integration=549c4b9b13365ce65c7bedbf6e4805d43aae099d

But unfortunately the problem persists.
I can reproduce following these steps:
open system settings > "Connections" kcm
close system settings
try to do logout
logout fails with a black screen

Operating System: Arch Linux 
KDE Plasma Version: 5.16.2
KDE Frameworks Version: 5.59.0
Qt Version: 5.12.4

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[David Edmundson]

https://bugs.kde.org/show_bug.cgi?id=372789

David Edmundson  changed:

   What|Removed |Added

 Status|CONFIRMED   |RESOLVED
  Latest Commit||https://commits.kde.org/kwa
   ||yland-integration/bfce3c672
   ||7cdc58a2b8ba33c933df05e2191
   ||4876
 Resolution|--- |FIXED

--- Comment #46 from David Edmundson  ---
Git commit bfce3c6727cdc58a2b8ba33c933df05e21914876 by David Edmundson.
Committed on 27/06/2019 at 08:37.
Pushed by davidedmundson into branch 'Plasma/5.16'.

Span wayland objects to lifespan of the QApplication

Summary:
We must release all wayland objects before the QPA connection is closed.

We used to do this explicitly, but this still left an awkward code path
where we could still try to recreate a BlurManager if it's called after
the QApplication is closed.

Instead we can scope all the wayland objects to the QApplication. The
objects themselves were not leaked as public API so this is safe. Calls
after this will simply no-op.

This fixes crashes on tear down of plasma.

Test Plan: kquitapp5 plasmashell

Reviewers: #plasma

Subscribers: apol, ngraham, anthonyfieroni, zzag, plasma-devel

Tags: #plasma

Differential Revision: https://phabricator.kde.org/D22084

M  +17   -42   src/windowsystem/waylandintegration.cpp
M  +9-8src/windowsystem/waylandintegration.h

https://commits.kde.org/kwayland-integration/bfce3c6727cdc58a2b8ba33c933df05e21914876

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Sandeep]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #45 from Sandeep  ---
(In reply to Ongun Kanat from comment #44)
> BTW, is there any Wayland protocol or something similar proposed to kill
> sessions after sometime prevent similar lockouts?

No, this doesn't have anything to do with Wayland protocol AFAIK. It seems to
be a bug within KWin/Plasma.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Ongun Kanat]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #44 from Ongun Kanat  ---
BTW, is there any Wayland protocol or something similar proposed to kill
sessions after sometime prevent similar lockouts?

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=372789

Nate Graham  changed:

   What|Removed |Added

 Status|REOPENED|CONFIRMED

--- Comment #43 from Nate Graham  ---
There's a patch that fixes this: https://phabricator.kde.org/D22084

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Patrick Silva]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #42 from Patrick Silva  ---
plasma 5.16 beta has the same bug :(

Operating System: Arch Linux 
KDE Plasma Version: 5.15.90
KDE Frameworks Version: 5.58.0
Qt Version: 5.13.0 beta3

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Jan Kundrát]

https://bugs.kde.org/show_bug.cgi?id=372789

Jan Kundrát  changed:

   What|Removed |Added

 CC||j...@kde.org

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Patrick Silva]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #41 from Patrick Silva  ---
ops, it's plasma 5.15 stable, not beta.

Operating System: Arch Linux 
KDE Plasma Version: 5.15.0
KDE Frameworks Version: 5.55.0
Qt Version: 5.12.1

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Patrick Silva]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #40 from Patrick Silva  ---
logout is still failing with plasma 5.15 beta on Arch Linux.
Can this problem be related to bug 355920 ?

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Mauro Molinari]

https://bugs.kde.org/show_bug.cgi?id=372789

Mauro Molinari  changed:

   What|Removed |Added

 CC||mauro...@tiscali.it

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #39 from Nate Graham  ---
(In reply to mthw0 from comment #38)
> Also it might be a coincidence but those two kcms you mentioned always ask
> to save changes (to any settings) even if there werent any, can it be
> related?
That's something else: Bug 396082

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[mthw0]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #38 from mthw0  ---
(In reply to Patrick Silva from comment #35)
> I can reproduce the problem on both Arch (plasma 5.14 beta) and Neon dev
> unstable.
> 
> start Wayland session
> open system settings
> open "Network" or "Window decoration" KCMs
> try to logout
> logout hangs with black screen

I have tried these steps three times in a row just now and everything worked
fine. But I do remember having this issue.

Also it might be a coincidence but those two kcms you mentioned always ask to
save changes (to any settings) even if there werent any, can it be related?

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Alexey Min]

https://bugs.kde.org/show_bug.cgi?id=372789

Alexey Min  changed:

   What|Removed |Added

 CC||alexey@gmail.com

--- Comment #37 from Alexey Min  ---
I think I had this, too, and even pinpointed the issue (lines of code which
cause a deadlock in kwin) but don't remember details.

Also in wayland, amdgpu,... In Gentoo

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Patrick Silva]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #36 from Patrick Silva  ---
this annoying problem persists.

Operating System: Arch Linux 
KDE Plasma Version: 5.14.4
Qt Version: 5.12.0
KDE Frameworks Version: 5.53.0

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[mthw0]

https://bugs.kde.org/show_bug.cgi?id=372789

mthw0  changed:

   What|Removed |Added

 CC||jari...@hotmail.com

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Dr . Chapatin]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #35 from Dr. Chapatin  ---
I can reproduce the problem on both Arch (plasma 5.14 beta) and Neon dev
unstable.

start Wayland session
open system settings
open "Network" or "Window decoration" KCMs
try to logout
logout hangs with black screen

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Sandeep]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #34 from Sandeep  ---
I forgot to mention, it's been working fine for me, for a few months now - no
black screen when logging out.

However, it looks like the Plasma session does get stuck and fails to close
entirely - not sure if that's related. It doesn't seem to cause problems.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Dr . Chapatin]

https://bugs.kde.org/show_bug.cgi?id=372789

Dr. Chapatin  changed:

   What|Removed |Added

 CC||thomas.pfeif...@kde.org

--- Comment #33 from Dr. Chapatin  ---
*** Bug 365823 has been marked as a duplicate of this bug. ***

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Dr . Chapatin]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #32 from Dr. Chapatin  ---
Bug persists on Arch Linux running plasma 5.13.3 and sddm 0.18.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=372789

Nate Graham  changed:

   What|Removed |Added

 Resolution|FIXED   |---
 Status|RESOLVED|REOPENED

--- Comment #31 from Nate Graham  ---
Sorry for the false hope everyone: I just saw it again. :( It's quite likely I
messed up the first test. Re-opening.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=372789

Nate Graham  changed:

   What|Removed |Added

 Status|CONFIRMED   |RESOLVED
 Resolution|--- |FIXED

--- Comment #30 from Nate Graham  ---
Thanks for the information! Confirmed, also fixed for me in 5.13 (beta) with
SDDM 0.17.

If anyone can still reproduce in Plasma 5.13 and SDDM 0.17 (or later), please
leave a comment in the ticket.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Rainer Finke]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #29 from Rainer Finke  ---
I've tested Plasma 5.13 beta on Wayland and so far the logout seems to always
work fine on my systems.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=372789

Nate Graham  changed:

   What|Removed |Added

 Status|UNCONFIRMED |CONFIRMED
 Ever confirmed|0   |1

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Piotr Kloc]

https://bugs.kde.org/show_bug.cgi?id=372789

Piotr Kloc  changed:

   What|Removed |Added

 CC||pepk...@gmail.com

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=372789

Nate Graham  changed:

   What|Removed |Added

  Flags||Wayland+, X11-

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=372789

aux...@gmail.com changed:

   What|Removed |Added

 CC||aux...@gmail.com

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Dr . Chapatin]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #28 from Dr. Chapatin  ---
logout from Wayland is still failing in plasma 5.12 stable, Arch Linux.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Dr . Chapatin]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #27 from Dr. Chapatin  ---
plasma 5.12 beta has the same problem on Arch Linux.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Munzir Taha]

https://bugs.kde.org/show_bug.cgi?id=372789

Munzir Taha  changed:

   What|Removed |Added

 CC||munzirt...@gmail.com

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Rainer Finke]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #26 from Rainer Finke  ---
When I logout I get in some cases a segmentation fault from Kwin. The
segmentation fault is from a system with a AMD GPU and mesa modesetting.

Linux 4.14.12
Plasma 5.11.5
KDE Frameworks 5.41
Qt 5.10

$ sudo gdb --pid `pidof kwin_wayland` 2>&1 | tee kwin3.gdb  
[sudo] Passwort für rainer: 
GNU gdb (GDB) 8.0.1 
Copyright (C) 2017 Free Software Foundation, Inc.   
License GPLv3+: GNU GPL version 3 or later    
This is free software: you are free to change and redistribute it.  
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"  
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".   
Type "show configuration" for configuration details.
For bug reporting instructions, please see: 
.
Find the GDB manual and other documentation resources online at:
.   
For help, type "help".  
Type "apropos word" to search for commands related to "word".   
Attaching to process 3240   
[New LWP 3241]  
[New LWP 3242]  
[New LWP 3243]  
[New LWP 3244]  
[New LWP 3245]  
[New LWP 3246]  
[New LWP 3247]  
[New LWP 3248]
[New LWP 3249]
[New LWP 3250]
[New LWP 3251]
[New LWP 3287]
[New LWP 3290]
[New LWP 3291]
[New LWP 3292]
[New LWP 3294]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/usr/lib/libthread_db.so.1".
0x7f469bec8a16 in ppoll () from /usr/lib/libc.so.6
(gdb) continue
Continuing.
[New Thread 0x7f464d845700 (LWP 4115)]
[New Thread 0x7f465700 (LWP 4117)]
[New Thread 0x7f4656ffd700 (LWP 4118)]
[New Thread 0x7f459f645700 (LWP 4119)]
[New Thread 0x7f459e481700 (LWP 4205)]
[Thread 0x7f46577fe700 (LWP 3292) exited]
[Thread 0x7f4657fff700 (LWP 3291) exited]
[Thread 0x7f465e268700 (LWP 3290) exited]
[Thread 0x7f459e481700 (LWP 4205) exited]
[Thread 0x7f465f7fe700 (LWP 3287) exited]
[Thread 0x7f468341a700 (LWP 3242) exited]
[Thread 0x7f4664ff9700 (LWP 3251) exited]
[Thread 0x7f465700 (LWP 4117) exited]
[Thread 0x7f464d845700 (LWP 4115) exited]
[Thread 0x7f4656ffd700 (LWP 4118) exited]
[Thread 0x7f459f645700 (LWP 4119) exited]
[Thread 0x7f46677fe700 (LWP 3246) exited]
[Thread 0x7f4666ffd700 (LWP 3247) exited]
[Thread 0x7f46667fc700 (LWP 3248) exited]
[Thread 0x7f4665ffb700 (LWP 3249) exited]
[Thread 0x7f46657fa700 (LWP 3250) exited]
[Thread 0x7f4667fff700 (LWP 3245) exited]
[Thread 0x7f466cbd9700 (LWP 3244) exited]

Thread 1 "kwin_wayland" received signal SIGSEGV, Segmentation fault.
0x7f46815e1d90 in ?? () from /usr/lib/libEGL_mesa.so.0
(gdb) bt
#0  0x7f46815e1d90 in  () at /usr/lib/libEGL_mesa.so.0
#1  0x7f46815dfb0b in  () at /usr/lib/libEGL_mesa.so.0
#2  0x7f46815e4d0a in  () at /usr/lib/libEGL_mesa.so.0
#3  0x7f46815d7b1b in eglTerminate () at /usr/lib/libEGL_mesa.so.0
#4  0x7f469e7359a4 in KWin::Platform::~Platform() () at
/usr/lib/libkwin.so.5
#5  0x7f4683847a5a in KWin::DrmBackend::~DrmBackend() () at
/usr/lib/qt/plugins/org.kde.kwin.waylandbackends/KWinWaylandDrmBackend.so
#6  0x7f469ca0e54d in QObjectPrivate::deleteChildren() () at
/usr/lib/libQt5Core.so.5
#7  0x7f469ca1817c in QObject::~QObject() () at /usr/lib/libQt5Core.so.5
#8  0x7f469c9e27fc in QCoreApplication::~QCoreApplication() () at
/usr/lib/libQt5Core.so.5
#9  0x7f469cf9c8b9 in QApplication::~QApplication() () at
/usr/lib/libQt5Widgets.so.5
#10 0x55f22aac870d in  ()
#11 0x55f22aac664e in  ()
#12 0x7f469bdfdf4a in __libc_start_main () at /usr/lib/libc.so.6
#13 0x55f22aac76da in _start ()

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=372789

jlj.babydra...@gmail.com changed:

   What|Removed |Added

 CC||jlj.babydra...@gmail.com

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Rainer Finke]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #25 from Rainer Finke  ---
Ok, I had some freezes again. I hoped it has been fixed, but it is only less
frequent, maybe because KDE Applications 5.12 are now KF5 only. So I still
assume it is related to XWayland which doesn't exit always correctly. Probably
with less applications requiring XWayland I see less freezes during logout.

SDDM 0.17
Qt5.10
KDE Frameworks 5.41
Plasma 5.11.4
KDE Applications 5.12

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Dr . Chapatin]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #24 from Dr. Chapatin  ---
This big problem is still happening on Arch Linux running plasma 5.11.4, sddm
0.17 and qt 5.10.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Rainer Finke]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #23 from Rainer Finke  ---
At least for me this seems to be fixed with SDDM 0.17. Can anyone else confirm
this?

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Nate Graham]

https://bugs.kde.org/show_bug.cgi?id=372789

Nate Graham  changed:

   What|Removed |Added

 CC||pointedst...@zoho.com

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Ongun Kanat]

https://bugs.kde.org/show_bug.cgi?id=372789

Ongun Kanat  changed:

   What|Removed |Added

 CC||ongun.ka...@gmail.com

--- Comment #22 from Ongun Kanat  ---
I also have been encountering this problem for a while. It is still
reproducible for me on Plasma 5.11.3. The system becomes unresponsive to
keyboard so Ctrl+Alt+F(1,2,3...) doesn't work. My attempts to gain keyboard
input via magic SysRq combination Alt+SysRq+R then trying to switch TTYs were
also failed. I don't have ssh on my machine so after an unsuccessful trial I
continue the sequence of Alt + SysRq + {R,E,I,S,U,B} and reboot my laptop.

The problem is always reproducible and occurs when I log out from X11 session
and log in to Wayland. If I log in to Wayland session directly after a reboot,
logout and reboot works correctly. Thinking it might be a cleanup/clean exit
issue I have recorded process trees as well as the journalctl log you can find
them below. The second clue that it might be a cleanup issue is that
systemd/dbus residue after logging out X11 session. Killing all the processes
from previous session results in correct behavior. It still might be a SDDM
issue though. Unfortunately I cannot test Wayland session without systemd.

Journalctl of failed wayland session: https://paste.kde.org/prrtatzh7
Process Trees:
Before logging in to X11: https://paste.kde.org/p1snpbw04
In X11 session: https://paste.kde.org/p01hfjadd
After logging out from X11: https://paste.kde.org/pgd3wnxwl

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Arthur Schiwon]

https://bugs.kde.org/show_bug.cgi?id=372789

Arthur Schiwon  changed:

   What|Removed |Added

 CC||bli...@arthur-schiwon.de

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Rainer Finke]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #21 from Rainer Finke  ---
Actually I assume the black screen is related to the following line in the
logs:
sddm-greeter[609]: The X11 connection broke: I/O error (code 1)

Maybe when I logout of Plasma-Wayland it does kill all X11 applications. And
SDDM is one of them.

So this makes me think that as long as there is no XWayland running on
Plasma-Wayland I can logout succesful. 

Strange thing is that as soon as I open a application like Kate or Konsole, the
system will freeze with the black screen on logout. Maybe some application
still open some X calls that we don't know yet and then XWayland is running in
the background, but I'm not a developer. Anyway Xwayland applications will be
around for a long time, so Plasma-Wayland should exit anyway without this
issue.

I can still SSH to the machine where Plasma-Wayland/SDDM failed with the black
scren. Stopping SDDM will show the console on the screen. But input with the
keyboard doesn't work. It seems like it is still locked somehow.


Plasma 5.11.1
KDE Frameworks 5.39
Qt 5.10 beta
SDDM 0.16
Arch Linux

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #20 from hum...@yahoo.fr ---
This problem is still there and I know that the blame is send to SDDM but I
want to mention that the wayland logout from gnome is working like a charm... 
So the problem can be from SDDM but I am suspecting that it is not the only
culprit especially because it is not possible to use gdm to log on plasma
wayland.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Dr . Chapatin]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #19 from Dr. Chapatin  ---
It happened with me today on Arch, plasma 5.11, qt 5.9.2, frameworks 5.39.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Rainer Finke]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #18 from Rainer Finke  ---
journalctl -f shows me the following log (connected via SSH) when I logout from
Plasma-Wayland. I use SDDM 0.16, Plasma 5.11, Qt 5.10 beta on Arch Linux.

Okt 12 22:50:03 pc plasmashell[6246]: Unexpected wl_surface.enter received for
output with id: 11 screen name: "Screen19" screen model: "eDP-1-unknown"
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: Shutdown called with confirm  -1
 type  0  and mode  -1
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: After modifications confirm is 
-1  type is  0  and mode  3
Okt 12 22:50:08 pc org_kde_powerdevil[6309]: powerdevil: Scheduling inhibition
from ":1.15" "ksmserver" with cookie 1 and reason "Shutting down system"
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: saveSession is  false
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: Saving legacy session apps
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: Done saving  0  legacy session
apps
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: clients should be empty,  false
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: completeShutdownOrCheckpoint
called
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: completeShutdownOrCheckpoint
called
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: state is  7
Okt 12 22:50:08 pc ksmserver[6241]: Error loading text-to-speech plug-in
"flite"
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: Starting killing clients
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: startKilling: client 
"pulseaudio" ( 101661911671180001507836583006241 )
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: startKilling: client 
"/usr/bin/xembedsniproxy" ( 1016619116711800015078365830062410001 )
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver:  We killed all clients. We have
now clients.count()= 2
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: KSMServer::completeKilling
clients.count()= 2
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: KSMServer::completeKilling
clients.count()= 1
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: KSMServer::completeKilling
clients.count()= 0
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: Starting killing WM
Okt 12 22:50:08 pc ksmserver[6241]: ksmserver: KSMServer::completeKillingWM
clients.count()= 0
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QThread: Destroyed while thread is still
running
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc polkitd[727]: Unregistered Authentication Agent for
unix-session:c5 (system bus name :1.205, object path
/org/kde/PolicyKit1/AuthenticationAgent, locale de_DE.UTF-8) (disconnected from
bus)
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal
KDEDModule::moduleDeleted(KDEDModule*): Pointers are not supported: KDEDModule*
Okt 12 22:50:08 pc kdeinit5[6214]: QDBusAbstractAdaptor: Cannot relay signal

[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Rainer Finke]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #17 from Rainer Finke  ---
There is  bug open at SDDM as well: https://github.com/sddm/sddm/issues/897

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[bugzilla_noreply]

https://bugs.kde.org/show_bug.cgi?id=372789

hum...@yahoo.fr changed:

   What|Removed |Added

 CC||hum...@yahoo.fr

--- Comment #16 from hum...@yahoo.fr ---
This behaviour is still present on 5.11 on archlinux. In reality it is a little
bit different now the screen is not totally black there are a small portion
which is garbage but the computer is frozen (ctrl-alt-Fx does not work), hard
reboot needed.

It can be SDDM but it is impossible to be sure since login on plasma wayland
with gdm does not work at all.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Simon Andric]

https://bugs.kde.org/show_bug.cgi?id=372789

Simon Andric  changed:

   What|Removed |Added

 CC||simonandr...@gmail.com

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Rainer Finke]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #15 from Rainer Finke  ---
Is it SDDM that is crashing? The bug report
https://bugs.kde.org/show_bug.cgi?id=370913 seems to indicate this.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Rainer Finke]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #14 from Rainer Finke  ---
As this issues bothers me, I did some further testing. It seems like if I have
no open application, the logouts works fine. In my test cases where I just
opened Kate (just a new file, I didn't even have to insert or modify some text)
and then I tried to logout I've always got the black screen.
My assumption is this is depending from some applications not closing as they
should and/or it is depending from the KDE feature to save the state of the
open applications and to restore them at the next login (a feature that I have
turned off on my desktops).
Can somebody else verify this?

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Rainer Finke]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #13 from Rainer Finke  ---
I didn't see this issue in 100% of the logouts either, but in almost 90% I do.
Restart is ok, just logout doesn't work. Sure Arch Linux has a newer kernel and
newer mesa. I do confirm that I have this with Linux 4.12 and mesa 17.2 on a
Intel GPU and on mesa-git on a AMD GPU.

This is one of the annoying bugs on Wayland.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Sandeep]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #12 from Sandeep  ---
I tried out KDE Neon, the developer unstable edition. Tried to reproduce the
problem once, worked fine there. Either the problem is fixed, or because the
conditions are different (Neon runs much older kernel, mesa etc. than my Arch
Linux system) the problem can't be reproduced.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Rainer Finke]

https://bugs.kde.org/show_bug.cgi?id=372789

Rainer Finke  changed:

   What|Removed |Added

 CC||m...@rainer-finke.de

--- Comment #11 from Rainer Finke  ---
I have this issue as well since a long time on Plasma-Wayland. It is one of the
things that keep me switching to Plama-Wayland. I'm running Arch Linux and I
have this issue on AMD and Intel GPU's.

In Plasma 5.1.95 (5.11 Beta) this issue is still existing

When I lock out of Plasma-Wayland the screen is black and I can only reset my
machine. I cannot even go to another TTY and restart SDDM or anything else.

I think this is a critical bug and I would appreciate if this could be solved.
And there is no workaround.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Sandeep]

https://bugs.kde.org/show_bug.cgi?id=372789

Sandeep  changed:

   What|Removed |Added

 CC||sandy.8...@gmail.com

--- Comment #10 from Sandeep  ---
I can confirm that I face this bug too.

I am running Arch Linux, here are the software versions:
plasma-desktop - 5.10.5
plasma-framework - 5.38.0
Linux kernel version - 4.12.10
Qt version - 5.9.1

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=372789

Christoph Feck  changed:

   What|Removed |Added

 CC||germano.massu...@gmail.com

--- Comment #9 from Christoph Feck  ---
*** Bug 379197 has been marked as a duplicate of this bug. ***

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Dr . Chapatin]

https://bugs.kde.org/show_bug.cgi?id=372789

Dr. Chapatin  changed:

   What|Removed |Added

 CC||yy...@gmx.com

--- Comment #8 from Dr. Chapatin  ---
confirmed on neon dev unstable.
login to x11, logout, login to Wayland again sometimes works.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Alexander Mentyu]

https://bugs.kde.org/show_bug.cgi?id=372789

Alexander Mentyu  changed:

   What|Removed |Added

 CC||notux...@gmail.com

--- Comment #7 from Alexander Mentyu  ---
Can confirm/reproduce this bug in:

Distribution: KDE neon Developer Edition Unstable Branches 20170813
KDE Plasma Version: 5.10.90
KDE Frameworks Version: 5.37.0
Qt Version: 5.9.1
Kernel Version: 4.10.0-32-generic
OS Type: 64-bit
Video Card: Intel 4500MHD

Reproducibility: 1 of ~10 times.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Simone Gaiarin]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #6 from Simone Gaiarin  ---
I have the same problem on plasma 5.10.2.

How can I provide better information to debug this?

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Simone Gaiarin]

https://bugs.kde.org/show_bug.cgi?id=372789

Simone Gaiarin  changed:

   What|Removed |Added

 CC||simg...@gmail.com

--- Comment #5 from Simone Gaiarin  ---
*** Bug 381502 has been marked as a duplicate of this bug. ***

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Michael D]

https://bugs.kde.org/show_bug.cgi?id=372789

Michael D  changed:

   What|Removed |Added

 CC||nortex...@gmail.com

--- Comment #4 from Michael D  ---
I have the same problem. Can't access a tty as Nicolas said. However, if I hold
the power button to shutdown, just before shutdown the neon logout screen
appears. I'm running KDE Neon User Edition.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Nicolas]

https://bugs.kde.org/show_bug.cgi?id=372789

Nicolas  changed:

   What|Removed |Added

 CC||nicolas.ho...@gmail.com

--- Comment #3 from Nicolas  ---
I have the same issue in plasma 5.9 with wayland on a thinkpad x250. When I log
out, I'm left to a black screen ctrl+alt+f-keys does not work and the only
thing I can do is power-off.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Carlos Olmedo Escobar]

https://bugs.kde.org/show_bug.cgi?id=372789

--- Comment #2 from Carlos Olmedo Escobar  ---
(In reply to Marco Martin from comment #1)
> not really, a crash.. perhaps nothing crasing, but kwin_wayland not actually
> quitting?

I never said it was a crash (whatever that means). The only thing that I know
is that it freezes completely with the screen in black instead of logging out.

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Marco Martin]

https://bugs.kde.org/show_bug.cgi?id=372789

Marco Martin  changed:

   What|Removed |Added

 CC||notm...@gmail.com

--- Comment #1 from Marco Martin  ---
not really, a crash.. perhaps nothing crasing, but kwin_wayland not actually
quitting?

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[plasmashell] [Bug 372789] Plasma freezes with black screen when logging out

[Carlos Olmedo Escobar]

https://bugs.kde.org/show_bug.cgi?id=372789

Carlos Olmedo Escobar  changed:

   What|Removed |Added

Summary|Plasma freezes when logging |Plasma freezes with black
   |out |screen when logging out

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