https://bugs.kde.org/show_bug.cgi?id=404192
Bug ID: 404192
Summary: kscreenlocker_greet 100% cpu and BSOD with cursor on
wakeup from suspend with NVIDIA
Product: kscreenlocker
Version: unspecified
Platform: Ubuntu Packages
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: greeter
Assignee: plasma-b...@kde.org
Reporter: kylek...@gmail.com
CC: bhus...@gmail.com
Target Milestone: ---
SUMMARY
kscreenlocker_greet is consuming 100% of a core sitting on Blank Screen Of
Death after a wakeup with only mouse cursor visible, I have to switch to tty2
and kill kscreenlocker_greet, after that usual login/greet shows up and
allowing me to login and get back to DE
[code]Thread 1 "kscreenlocker_g" received signal SIGINT, Interrupt.
futex_wait_cancelable (private=<optimized out>, expected=0,
futex_word=0x5583fc92d524)
at ../sysdeps/unix/sysv/linux/futex-internal.h:88
88 in ../sysdeps/unix/sysv/linux/futex-internal.h
#0 futex_wait_cancelable (private=<optimized out>, expected=0,
futex_word=0x5583fc92d524)
at ../sysdeps/unix/sysv/linux/futex-internal.h:88
#1 __pthread_cond_wait_common (abstime=0x0, mutex=0x5583fc92d4d0,
cond=0x5583fc92d4f8) at pthread_cond_wait.c:502
#2 __pthread_cond_wait (cond=0x5583fc92d4f8, mutex=0x5583fc92d4d0) at
pthread_cond_wait.c:655
#3 0x00007f11d90d143b in QWaitCondition::wait(QMutex*, unsigned long) () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#4 0x00007f11da2333d7 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#5 0x00007f11da2358c0 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#6 0x00007f11da235ef3 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#7 0x00007f11d968ab05 in QWindow::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#8 0x00007f11da29787b in QQuickWindow::event(QEvent*) () from
/usr/lib/x86_64-linux-gnu/libQt5Quick.so.5
#9 0x00007f11d9279499 in QCoreApplication::notifyInternal2(QObject*, QEvent*)
()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#10 0x00007f11d967f7e3 in
QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*)
()
from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#11 0x00007f11d96804bd in
QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*)
() from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#12 0x00007f11d965ab6b in
QWindowSystemInterface::sendWindowSystemEvents(QFlags<QEventLoop::ProcessEventsFlag>)
()
from /usr/lib/x86_64-linux-gnu/libQt5Gui.so.5
#13 0x00007f11d2a9de5b in ?? () from
/usr/lib/x86_64-linux-gnu/libQt5XcbQpa.so.5
#14 0x00007f11d927816b in
QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#15 0x00007f11d92802e2 in QCoreApplication::exec() () from
/usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#16 0x00005583fa4c2c0e in ?? ()
#17 0x00007f11d8cbe09b in __libc_start_main (main=0x5583fa4c24a0, argc=6,
argv=0x7ffcbe3ac9f8, init=<optimized out>,
fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7ffcbe3ac9e8)
at ../csu/libc-start.c:308
#18 0x00005583fa4c2eea in _start ()
Detaching from program: /usr/lib/x86_64-linux-gnu/libexec/kscreenlocker_greet,
process 15745
[Inferior 1 (process 15745) detached][/code]
STEPS TO REPRODUCE
1. Suspend
2. Wakeup
OBSERVED RESULT
BSOD, can't login, can only move mouse cursor around
EXPECTED RESULT
Login and continue doing work
SOFTWARE/OS VERSIONS
Operating System: Kubuntu 18.10 with kubuntu-ppa
KDE Plasma Version: 5.14.5
Qt Version: 5.11.1
KDE Frameworks Version: 5.52.0
Kernel Version: 4.18.0-14-generic
Nvidia 410.78 driver
GeForce GTX 980
ADDITIONAL INFORMATION
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