Frequent KWin crashes on switching TTYs

chigurh · February 26, 2019, 6:19am

I get frequent TTYs crashes when I switch TTYs.

Crash report is here -

Application: KWin (kwin_x11), signal: Segmentation fault
Using host libthread_db library "/lib64/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f3135344140 (LWP 3308))]


Thread 5 (Thread 0x7f3131467700 (LWP 14527)):
#0  0x00007f313a49cba6 in ppoll () from /lib64/libc.so.6
#1  0x00007f3139001c41 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /usr/lib64/libQt5Core.so.5
#2  0x00007f31390030b9 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#3  0x00007f3138fb04fb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f3138dfa396 in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#5  0x00007f3138dfb6e2 in ?? () from /usr/lib64/libQt5Core.so.5
#6  0x00007f31383ddfab in start_thread () from /lib64/libpthread.so.0
#7  0x00007f313a4a766f in clone () from /lib64/libc.so.6


Thread 4 (Thread 0x7f31177fe700 (LWP 3392)):
#0  0x00007f31383e3fdc in pthread_cond_wait@@GLIBC_2.3.2 () from /lib64/libpthread.so.0
#1  0x00007f31388e709a in ?? () from /usr/lib64/libQt5Script.so.5
#2  0x00007f31388e70bb in ?? () from /usr/lib64/libQt5Script.so.5
#3  0x00007f31383ddfab in start_thread () from /lib64/libpthread.so.0
#4  0x00007f313a4a766f in clone () from /lib64/libc.so.6


Thread 3 (Thread 0x7f31309c0700 (LWP 3377)):
#0  0x00007f313a49cba6 in ppoll () from /lib64/libc.so.6
#1  0x00007f3139001c41 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /usr/lib64/libQt5Core.so.5
#2  0x00007f31390030b9 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#3  0x00007f3138fb04fb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f3138dfa396 in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#5  0x00007f3137b8cf25 in ?? () from /usr/lib64/libQt5Qml.so.5
#6  0x00007f3138dfb6e2 in ?? () from /usr/lib64/libQt5Core.so.5
#7  0x00007f31383ddfab in start_thread () from /lib64/libpthread.so.0
#8  0x00007f313a4a766f in clone () from /lib64/libc.so.6


Thread 2 (Thread 0x7f3132728700 (LWP 3348)):
#0  0x00007f313a49cba6 in ppoll () from /lib64/libc.so.6
#1  0x00007f3139001c41 in qt_safe_poll(pollfd*, unsigned long, timespec const*) () from /usr/lib64/libQt5Core.so.5
#2  0x00007f31390030b9 in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#3  0x00007f3138fb04fb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#4  0x00007f3138dfa396 in QThread::exec() () from /usr/lib64/libQt5Core.so.5
#5  0x00007f31375ec565 in ?? () from /usr/lib64/libQt5DBus.so.5
#6  0x00007f3138dfb6e2 in ?? () from /usr/lib64/libQt5Core.so.5
#7  0x00007f31383ddfab in start_thread () from /lib64/libpthread.so.0
#8  0x00007f313a4a766f in clone () from /lib64/libc.so.6


Thread 1 (Thread 0x7f3135344140 (LWP 3308)):
[KCrash Handler]
#6  0x00007f3138af3081 in ?? () from /usr/lib64/libkwin4_effect_builtins.so.1
#7  0x00007f3138af3144 in ?? () from /usr/lib64/libkwin4_effect_builtins.so.1
#8  0x00007f3138af46b5 in ?? () from /usr/lib64/libkwin4_effect_builtins.so.1
#9  0x00007f3138af5093 in ?? () from /usr/lib64/libkwin4_effect_builtins.so.1
#10 0x00007f313a21a723 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkwin.so.5
#11 0x00007f3138a66a49 in ?? () from /usr/lib64/libkwin4_effect_builtins.so.1
#12 0x00007f313a21a723 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkwin.so.5
#13 0x00007f3138b57cbc in KWin::Effect::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkwineffects.so.12
#14 0x00007f313a21a723 in KWin::EffectsHandlerImpl::drawWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkwin.so.5
#15 0x00007f313a2054dc in KWin::Scene::finalPaintWindow(KWin::EffectWindowImpl*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkwin.so.5
#16 0x00007f313a21a5bb in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkwin.so.5
#17 0x00007f3138b57b4c in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkwineffects.so.12
#18 0x00007f313a21a563 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkwin.so.5
#19 0x00007f3138b57b4c in KWin::Effect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkwineffects.so.12
#20 0x00007f313a21a563 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkwin.so.5
#21 0x00007f3138b6043b in KWin::AnimationEffect::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkwineffects.so.12
#22 0x00007f313a21a563 in KWin::EffectsHandlerImpl::paintWindow(KWin::EffectWindow*, int, QRegion, KWin::WindowPaintData&) () from /usr/lib64/libkwin.so.5
#23 0x00007f313a20b9b1 in KWin::Scene::paintWindow(KWin::Scene::Window*, int, QRegion, KWin::WindowQuadList) () from /usr/lib64/libkwin.so.5
#24 0x00007f313a208367 in KWin::Scene::paintSimpleScreen(int, QRegion) () from /usr/lib64/libkwin.so.5
#25 0x00007f31301a8302 in ?? () from /usr/lib64/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#26 0x00007f313a20aee0 in KWin::Scene::finalPaintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib64/libkwin.so.5
#27 0x00007f313a21a315 in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib64/libkwin.so.5
#28 0x00007f3138b57aa1 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib64/libkwineffects.so.12
#29 0x00007f313a21a2bd in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib64/libkwin.so.5
#30 0x00007f3138b57aa1 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib64/libkwineffects.so.12
#31 0x00007f313a21a2bd in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib64/libkwin.so.5
#32 0x00007f3138b57aa1 in KWin::Effect::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib64/libkwineffects.so.12
#33 0x00007f313a21a2bd in KWin::EffectsHandlerImpl::paintScreen(int, QRegion, KWin::ScreenPaintData&) () from /usr/lib64/libkwin.so.5
#34 0x00007f313a20ab8e in KWin::Scene::paintScreen(int*, QRegion const&, QRegion const&, QRegion*, QRegion*, QMatrix4x4 const&, QRect const&) () from /usr/lib64/libkwin.so.5
#35 0x00007f31301b0579 in KWin::SceneOpenGL::paint(QRegion, QList<KWin::Toplevel*>) () from /usr/lib64/qt5/plugins/org.kde.kwin.scenes/KWinSceneOpenGL.so
#36 0x00007f313a1fc91a in KWin::Compositor::performCompositing() () from /usr/lib64/libkwin.so.5
#37 0x00007f3138fdbcbb in QObject::event(QEvent*) () from /usr/lib64/libQt5Core.so.5
#38 0x00007f31399a5591 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#39 0x00007f31399acb30 in QApplication::notify(QObject*, QEvent*) () from /usr/lib64/libQt5Widgets.so.5
#40 0x00007f3138fb1829 in QCoreApplication::notifyInternal2(QObject*, QEvent*) () from /usr/lib64/libQt5Core.so.5
#41 0x00007f3139005053 in QTimerInfoList::activateTimers() () from /usr/lib64/libQt5Core.so.5
#42 0x00007f313900320c in QEventDispatcherUNIX::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#43 0x00007f3133551b7e in ?? () from /usr/lib64/libQt5XcbQpa.so.5
#44 0x00007f3138fb04fb in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib64/libQt5Core.so.5
#45 0x00007f3138fb8652 in QCoreApplication::exec() () from /usr/lib64/libQt5Core.so.5
#46 0x00007f313a57b4ab in kdemain () from /usr/lib64/libkdeinit5_kwin_x11.so
#47 0x00007f313a3cfb7b in __libc_start_main () from /lib64/libc.so.6
#48 0x0000560a4207d08a in _start ()
[Inferior 1 (process 3308) detached]

This often disables opengl and distorts KDE.

nrickert · February 26, 2019, 6:44am

Can you explain what you mean by “switch TTYs”. I can think of more than one possible meaning, so it would be helpful if you could clarify.

nrickert · February 26, 2019, 6:47am

Some more information would be useful.

What Tumbleweed snapshot are you running? You can check with:

cat /etc/os-release

How are you updating your system?

chigurh · February 26, 2019, 11:59am

I am on latest Tumbleweed.

# cat /etc/os-release 
NAME="openSUSE Tumbleweed"
# VERSION="20190220"
ID="opensuse-tumbleweed"
ID_LIKE="opensuse suse"
VERSION_ID="20190220"
PRETTY_NAME="openSUSE Tumbleweed"
ANSI_COLOR="0;32"
CPE_NAME="cpe:/o:opensuse:tumbleweed:20190220"
BUG_REPORT_URL="https://bugs.opensuse.org"
HOME_URL="https://www.opensuse.org/"

I do zypper up & dup.

chigurh · February 26, 2019, 12:03pm

When I activate tty(2-6) with ALT+CTL+F(n) and go back to tty7 I experience this crash all the time. I can provide a complete crash report but the KDE thing says I need pbuildid for collecting debug info but there is no such package or I can’t find it.

nrickert · February 26, 2019, 2:49pm

Best to use “zypper dup”. Otherwise you can get incomplete updates. Your problem is the kind of thing that can happen with incomplete updates.

I have not seen this problem. But let’s look at what might be different for your system.

I’m using GDM for logins. You may be using SDDM.
I usually run KDE with X11. Perhaps you are using Wayland. I don’t think I have tried switching ttys with KDE/Wayland.

chigurh · February 27, 2019, 4:12am

Since last week I use zypper dup for updates. I am using SDDM with X11 -

(base)  
[Tue Feb 26 19:10:31 flux@flux ~] 
# loginctl
SESSION  UID USER SEAT  TTY
      2 1000 flux seat0     

1 sessions listed.
(base)  
[Tue Feb 26 19:10:34 flux@flux ~] 
# loginctl show-session 2 -p Type
Type=x11
(base)  
[Tue Feb 26 19:11:01 flux@flux ~] 
#

nrickert · February 27, 2019, 5:07am

Just as a test, I switched to using SDDM.

After rebooting, I logged in, then logged out again.

I then switched to tty1 (went okay)
Next I switched to tty2 – and my system rebooted.

However, that has not happened again. In several repeat tests, it is all working fine. I should probably mention that my testing was in a KVM virtual machine.

Could it be graphics related? What kind of graphics card to you have?

chigurh · February 27, 2019, 5:34am

Yeah, I witnessed the reboot when I switched to tty2 post install. I am using NVIDIA gpu but have witnessed this behavior on stock Intel HD Graphics too.

nrickert · February 27, 2019, 3:23pm

Only Intel graphics here. And I have not been able to get the problem to repeat.

If these failures are repeatable for you, then maybe open a bug report.

xorbe · February 28, 2019, 10:46pm

I get this too. If I switch to text then back to graphical, generally kwin crashes and restarts. Using latest TW + latest nvidia driver + GTX 1060 6GB. Kwin restarts fine, and I rarely switch to text anyway, but yeah it crashes a lot when switching back to gui. I don’t know if it’s affecting my opengl, but I’m not seeing any “kde distortions” (per first post).

Specifically, I get a black screen for about 10 seconds, and then a pop-up notification that says “KWin closed unexpectedly” and “Desktop effects were restarted due to a graphics reset”.

enziosavio · February 28, 2019, 10:58pm

Have you tried to simply delete the configuration files, among the hidden files?

xorbe · March 11, 2019, 5:46pm

Today when I switched from text console back to KDE, I encountered the graphics corruption on the KDE panel that someone else was talking about. I logged out and back in to recover (ie didn’t reboot).

Is there a way to kill and restart the KDE launcher panel? What are the magic commands?

tannington · March 11, 2019, 8:01pm

Could try restarting plasmashell

Alt-F2 then in the “search” box

kquitapp5 plasmashell && kstart5 plasmashell

and hit the “return” key.

xorbe · March 11, 2019, 11:31pm

Works a treat! Thanks!

tannington · March 12, 2019, 11:20am

Interestingly, or more correctly annoyingly, I’ve been experiencing a very similar (kwin crashes and is restarted upon switching back to a graphics screen) problem on leap 15.0 with proprietary nvidia driver. The same hardware worked flawlessly with 42.3.

Googling around it seems this is quite a common problem, with possibly multiple causes and in some cases solutions.

The (KDE/KWin) developers don’t seem particularly interested now as their efforts are on Wayland, KWin effectively being frozen, even for bugs.

This particular problem is generally put down to a bug in the proprietary driver: “As Martin [Flöser] said in 385324, you need to report to your driver vendor that the driver triggers the graphics reset.” is a typical response, (from 401410 – KWin constantly restarts)

In my own case it can be avoided by first logging out from KDE before switching to a VT, albeit is does add a few seconds, but avoids KWin crashing/restarting.