Public bug reported:
steps to reproduce. Login to Kubuntu, lock your screen. try to unlock.
will be presented with a black screen with instruction to switch to tty
and unlock session using command line like loginctl unlock-session 3 etc
to resume kde session. This problem comes only when unlocking an
existing kde session. noticed below errors in the journal log. let me
know if any additional information is required.
Nov 30 22:32:42 PVLenovo kwin_wayland_wrapper[2640]: kwin_wayland_drm: atomic
commit failed: Invalid argument
Nov 30 22:32:45 PVLenovo kwin_wayland_wrapper[5316]: Fatal Python error:
_PyImport_Init: global import state already initialized
Nov 30 22:32:45 PVLenovo kwin_wayland_wrapper[5316]: Python runtime state:
preinitialized
Nov 30 22:32:45 PVLenovo kernel: kscreenlocker_g[5316]: segfault at 30 ip
00007ad7e5fb94bb sp 00007ffc46b4a6b0 error 4 in
libKF6Svg.so.6.8.0[214bb,7ad7e5fa5000+34000] likely on CPU 3
(core 4, socket 0)
Nov 30 22:32:45 PVLenovo kernel: Code: 41 0f 6f 07 0f 11 00 f3 41 0f 6f 47 10
0f 11 40 10 49 8b 57 20 48 89 50 20 49 83 c5 01 49 81 fd 80 00 00 00 0f 84 5d
02 00 00 <43> 0f b6 04 29 3
c ff 74 e6 48 8d 14 80 49 8b 81 80 00 00 00 4c 8d
Nov 30 22:32:45 PVLenovo kernel: Lockdown: systemd-logind: hibernation is
restricted; see man kernel_lockdown.7
Nov 30 22:32:45 PVLenovo kernel: Lockdown: systemd-logind: hibernation is
restricted; see man kernel_lockdown.7
Nov 30 22:32:45 PVLenovo kernel: Lockdown: systemd-logind: hibernation is
restricted; see man kernel_lockdown.7
Nov 30 22:32:45 PVLenovo kernel: Lockdown: systemd-logind: hibernation is
restricted; see man kernel_lockdown.7
Nov 30 22:32:45 PVLenovo kernel: Lockdown: systemd-logind: hibernation is
restricted; see man kernel_lockdown.7
Nov 30 22:32:45 PVLenovo kwin_wayland_wrapper[5371]: The cached device pixel
ratio value was stale on window update. Please file a QTBUG which explains how
to reproduce.
Nov 30 22:32:46 PVLenovo kwin_wayland_wrapper[5371]: Fatal Python error:
_PyImport_Init: global import state already initialized
Nov 30 22:32:46 PVLenovo kwin_wayland_wrapper[5371]: Python runtime state:
preinitialized
Nov 30 22:32:46 PVLenovo kwin_wayland_wrapper[5371]: Thread 0x00007e2888c006c0
(most recent call first):
Nov 30 22:32:46 PVLenovo kwin_wayland_wrapper[5371]: <no Python frame>
Nov 30 22:32:46 PVLenovo kwin_wayland_wrapper[5371]: Thread 0x00007e28734006c0
(most recent call first):
Nov 30 22:32:46 PVLenovo kwin_wayland_wrapper[5371]: <no Python frame>
Nov 30 22:32:46 PVLenovo kwin_wayland_wrapper[5371]: QObject::killTimer: Timers
cannot be stopped from another thread
Nov 30 22:32:46 PVLenovo kwin_wayland_wrapper[5371]: QObject::~QObject: Timers
cannot be stopped from another thread
Nov 30 22:32:46 PVLenovo kernel: kscreenlocker_g[5371]: segfault at 30 ip
00007e289cc324bb sp 00007ffd9ef90df0 error 4 in
libKF6Svg.so.6.8.0[214bb,7e289cc1e000+34000] likely on CPU 4
(core 8, socket 0)
Nov 30 22:32:46 PVLenovo kernel: Code: 41 0f 6f 07 0f 11 00 f3 41 0f 6f 47 10
0f 11 40 10 49 8b 57 20 48 89 50 20 49 83 c5 01 49 81 fd 80 00 00 00 0f 84 5d
02 00 00 <43> 0f b6 04 29 3
c ff 74 e6 48 8d 14 80 49 8b 81 80 00 00 00 4c 8d
Nov 30 22:32:46 PVLenovo kwin_wayland_wrapper[5410]: The cached device pixel
ratio value was stale on window update. Please file a QTBUG which explains how
to reproduce.
Nov 30 22:32:47 PVLenovo kwin_wayland_wrapper[5410]: Fatal Python error:
_PyImport_Init: global import state already initialized
Nov 30 22:32:47 PVLenovo kwin_wayland_wrapper[5410]: Python runtime state:
preinitialized
Nov 30 22:32:47 PVLenovo kernel: traps: QThread[5420] general protection fault
ip:7a8670847aaf sp:7a865a9feed0 error:0 in libc.so.6[47aaf,7a8670828000+196000]
:
ProblemType: Bug
DistroRelease: Ubuntu 25.04
Package: libkscreenlocker6 6.2.4-0ubuntu1
ProcVersionSignature: Ubuntu 6.11.0-9.9-generic 6.11.0
Uname: Linux 6.11.0-9-generic x86_64
ApportVersion: 2.30.0-0ubuntu5
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: KDE
Date: Sat Nov 30 22:45:16 2024
InstallationDate: Installed on 2024-05-06 (209 days ago)
InstallationMedia: Kubuntu 24.04 LTS "Noble Numbat" - Beta amd64 (20240411.2)
SourcePackage: kscreenlocker
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: kscreenlocker (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug plucky wayland-session
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https://bugs.launchpad.net/bugs/2090650
Title:
getting segfault when trying to unlock session in gui
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