powerdevil crashes with assertion failure in libddcutil after resume from sleep/hibernate

[v8wzge]

Environment
OS: Arch Linux (x86_64)
KDE Plasma 6
powerdevil
ddcutil 2.2.6-1 (libddcutil.so.5)
Steps to reproduce
Boot system normally → powerdevil works fine, no crash.
Put system into sleep (suspend) or hibernate.
Wake / resume system.
powerdevil crashes immediately after resume.
Actual result
After system resume from suspend/hibernate, org_kde_powerdevil dumps core with SIGABRT.Crash happens inside libddcutil.so.5 during ddca_redetect_displays.
Expected result
powerdevil should resume normally after suspend/hibernate without crashing.
Stack trace (key part)

文本文件.txt

Additional info
No crash on normal desktop startup.
Only occurs after waking up from suspend/hibernate.
Seems related to DDC/CI display re-detection after resume.
In version 2.2.3-1, it is normal

[v8wzge]

` PID: 3736 (org_kde_powerde)
UID: 1000 (xu)
GID: 1000 (xu)
Signal: 6 (ABRT)
Timestamp: Wed 2026-03-25 14:46:44 CST (3min 49s ago)
Command Line: /usr/lib/org_kde_powerdevil
Executable: /usr/lib/org_kde_powerdevil
Control Group: /user.slice/user-1000.slice/user@1000.service/background.slice/plasma-powerdevil.service
Unit: user@1000.service
User Unit: plasma-powerdevil.service
Slice: user-1000.slice
Owner UID: 1000 (xu)
Boot ID: 401ba3ea5edb46708370cebb237e1e66
Machine ID: 6f529cd6d76343fcad3329095fe24c37
Hostname: archlinux
Storage: /var/lib/systemd/coredump/core.org_kde_powerde.1000.401ba3ea5edb46708370cebb237e1e66.3736.1774421204000000.zst (present)
Size on Disk: 1.4M
Message: Process 3736 (org_kde_powerde) of user 1000 dumped core.

            Stack trace of thread 3736:
            #0  0x00007fa5428a7a2c n/a (libc.so.6 + 0x98a2c)
            #1  0x00007fa54284d1a0 raise (libc.so.6 + 0x3e1a0)
            #2  0x00007fa544299e6c _ZN6KCrash19defaultCrashHandlerEi (libKF6Crash.so.6 + 0x7e6c)
            #3  0x00007fa54284d2d0 n/a (libc.so.6 + 0x3e2d0)
            #4  0x00007fa5428a7a2c n/a (libc.so.6 + 0x98a2c)
            #5  0x00007fa54284d1a0 raise (libc.so.6 + 0x3e1a0)
            #6  0x00007fa5428345fe abort (libc.so.6 + 0x255fe)
            #7  0x00007fa542835697 n/a (libc.so.6 + 0x26697)
            #8  0x00007fa5428450b2 __assert_fail (libc.so.6 + 0x360b2)
            #9  0x00007fa543507582 n/a (libddcutil.so.5 + 0xb582)
            #10 0x00007fa543591fa7 ddca_redetect_displays (libddcutil.so.5 + 0x95fa7)
            #11 0x00007fa54425f50d n/a (libpowerdevilcore.so.2 + 0x8650d)
            #12 0x00007fa542fc6474 _ZN7QObject5eventEP6QEvent (libQt6Core.so.6 + 0x1c6474)
            #13 0x00007fa542f6bf48 _ZN16QCoreApplication15notifyInternal2EP7QObjectP6QEvent (libQt6Core.so.6 + 0x16bf48)
            #14 0x00007fa542f6c320 _ZN23QCoreApplicationPrivate16sendPostedEventsEP7QObjectiP11QThreadData (libQt6Core.so.6 + 0x16c320)
            #15 0x00007fa543251e78 n/a (libQt6Core.so.6 + 0x451e78)
            #16 0x00007fa54210ff4d n/a (libglib-2.0.so.0 + 0x5ef4d)
            #17 0x00007fa542111617 n/a (libglib-2.0.so.0 + 0x60617)
            #18 0x00007fa542111825 g_main_context_iteration (libglib-2.0.so.0 + 0x60825)
            #19 0x00007fa54324fcd2 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x44fcd2)
            #20 0x00007fa542f76cf6 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x176cf6)
            #21 0x00007fa542f709f1 _ZN16QCoreApplication4execEv (libQt6Core.so.6 + 0x1709f1)
            #22 0x000056302720fd69 n/a (/usr/lib/org_kde_powerdevil + 0x6d69)
            #23 0x00007fa5428366c1 n/a (libc.so.6 + 0x276c1)
            #24 0x00007fa5428367f9 __libc_start_main (libc.so.6 + 0x277f9)
            #25 0x00005630272107c5 n/a (/usr/lib/org_kde_powerdevil + 0x77c5)

            Stack trace of thread 3835:
            #0  0x00007fa5428adf32 n/a (libc.so.6 + 0x9ef32)
            #1  0x00007fa5428a239c n/a (libc.so.6 + 0x9339c)
            #2  0x00007fa5428a23e4 n/a (libc.so.6 + 0x933e4)
            #3  0x00007fa54291bdae __poll (libc.so.6 + 0x10cdae)
            #4  0x00007fa5423e2cf5 n/a (libQt6WaylandClient.so.6 + 0x6acf5)
            #5  0x00007fa543131c7a n/a (libQt6Core.so.6 + 0x331c7a)
            #6  0x00007fa5428a597a n/a (libc.so.6 + 0x9697a)
            #7  0x00007fa5429292bc n/a (libc.so.6 + 0x11a2bc)

            Stack trace of thread 3845:
            #0  0x00007fa54292706d syscall (libc.so.6 + 0x11806d)
            #1  0x00007fa54213da2e g_cond_wait (libglib-2.0.so.0 + 0x8ca2e)
            #2  0x00007fa5420d722d n/a (libglib-2.0.so.0 + 0x2622d)
            #3  0x00007fa542147607 n/a (libglib-2.0.so.0 + 0x96607)
            #4  0x00007fa54214713c n/a (libglib-2.0.so.0 + 0x9613c)
            #5  0x00007fa5428a597a n/a (libc.so.6 + 0x9697a)
            #6  0x00007fa5429292bc n/a (libc.so.6 + 0x11a2bc)

            Stack trace of thread 3846:
            #0  0x00007fa5428adf32 n/a (libc.so.6 + 0x9ef32)
            #1  0x00007fa5428a239c n/a (libc.so.6 + 0x9339c)
            #2  0x00007fa5428a23e4 n/a (libc.so.6 + 0x933e4)
            #3  0x00007fa54291c2f6 ppoll (libc.so.6 + 0x10d2f6)
            #4  0x00007fa542111744 n/a (libglib-2.0.so.0 + 0x60744)
            #5  0x00007fa542111825 g_main_context_iteration (libglib-2.0.so.0 + 0x60825)
            #6  0x00007fa542111872 n/a (libglib-2.0.so.0 + 0x60872)
            #7  0x00007fa54214713c n/a (libglib-2.0.so.0 + 0x9613c)
            #8  0x00007fa5428a597a n/a (libc.so.6 + 0x9697a)
            #9  0x00007fa5429292bc n/a (libc.so.6 + 0x11a2bc)

            Stack trace of thread 3849:
            #0  0x00007fa5428adf32 n/a (libc.so.6 + 0x9ef32)
            #1  0x00007fa5428a239c n/a (libc.so.6 + 0x9339c)
            #2  0x00007fa5428a23e4 n/a (libc.so.6 + 0x933e4)
            #3  0x00007fa54291c2f6 ppoll (libc.so.6 + 0x10d2f6)
            #4  0x00007fa542111744 n/a (libglib-2.0.so.0 + 0x60744)
            #5  0x00007fa5421119d7 g_main_loop_run (libglib-2.0.so.0 + 0x609d7)
            #6  0x00007fa53ac290c4 n/a (libgio-2.0.so.0 + 0x1190c4)
            #7  0x00007fa54214713c n/a (libglib-2.0.so.0 + 0x9613c)
            #8  0x00007fa5428a597a n/a (libc.so.6 + 0x9697a)
            #9  0x00007fa5429292bc n/a (libc.so.6 + 0x11a2bc)

            Stack trace of thread 3834:
            #0  0x00007fa5428adf32 n/a (libc.so.6 + 0x9ef32)
            #1  0x00007fa5428a239c n/a (libc.so.6 + 0x9339c)
            #2  0x00007fa5428a23e4 n/a (libc.so.6 + 0x933e4)
            #3  0x00007fa54291bdae __poll (libc.so.6 + 0x10cdae)
            #4  0x00007fa5423e2cf5 n/a (libQt6WaylandClient.so.6 + 0x6acf5)
            #5  0x00007fa543131c7a n/a (libQt6Core.so.6 + 0x331c7a)
            #6  0x00007fa5428a597a n/a (libc.so.6 + 0x9697a)
            #7  0x00007fa5429292bc n/a (libc.so.6 + 0x11a2bc)

            Stack trace of thread 3742:
            #0  0x00007fa5428adf32 n/a (libc.so.6 + 0x9ef32)
            #1  0x00007fa5428a239c n/a (libc.so.6 + 0x9339c)
            #2  0x00007fa5428a23e4 n/a (libc.so.6 + 0x933e4)
            #3  0x00007fa54291c2f6 ppoll (libc.so.6 + 0x10d2f6)
            #4  0x00007fa542111744 n/a (libglib-2.0.so.0 + 0x60744)
            #5  0x00007fa542111825 g_main_context_iteration (libglib-2.0.so.0 + 0x60825)
            #6  0x00007fa54324fcb2 _ZN20QEventDispatcherGlib13processEventsE6QFlagsIN10QEventLoop17ProcessEventsFlagEE (libQt6Core.so.6 + 0x44fcb2)
            #7  0x00007fa542f76cf6 _ZN10QEventLoop4execE6QFlagsINS_17ProcessEventsFlagEE (libQt6Core.so.6 + 0x176cf6)
            #8  0x00007fa54309277e _ZN7QThread4execEv (libQt6Core.so.6 + 0x29277e)
            #9  0x00007fa543fc007e n/a (libQt6DBus.so.6 + 0x3707e)
            #10 0x00007fa543131c7a n/a (libQt6Core.so.6 + 0x331c7a)
            #11 0x00007fa5428a597a n/a (libc.so.6 + 0x9697a)
            #12 0x00007fa5429292bc n/a (libc.so.6 + 0x11a2bc)
            ELF object binary architecture: AMD x86-64

`
This is a crash error dump report
It is worth mentioning that after disabling its dependency on ddcutil according to the method provided by powerdevil, there will be no crashes

[rockowitz]

This crash due to an assert() failure has been addressed in ddcutil 2.2.7-dev. For details, see KDE bug report 517571.

Unfortunately, while the crash dump shows where the assert() failure occurred, it does not show the sequence of events that led to the assert() failure. For that I need the relevant output of journalctl -t org_kde_powerdevil, beginning with the line "Starting libddcutil" that precedes the failure, or if running 2.2.7-dev, the syslog lines related to display redetection.

[v8wzge]

3月 26 08:23:34 archlinux org_kde_powerdevil[2391]: Starting libddcutil. library built Not set at Not set. stdout_stderr_redirected=true
3月 26 08:23:34 archlinux org_kde_powerdevil[2391]: Failed to register with host portal QDBusError("org.freedesktop.portal.Error.Failed", "Could not register app ID: App info not found for '
org.kde.org_kde_powerdevil'")
3月 26 08:23:34 archlinux org_kde_powerdevil[2391]: Handle button events action could not check for screen configuration
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: Starting libddcutil. library built Not set at Not set. stdout_stderr_redirected=true
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: Starting. library built Not set at Not set, library_initialized=false, libopts=|(null)|
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: Initializing libddcutil.  ddcutil version: 2.2.6, shared library: /usr/lib/libddcutil.so.5.5.0
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]:                           library built Not set at Not set. stdout_stderr_redirected=true
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: [  2457] Options passed from client:
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: [  2457] Applying combined libddcutil options:
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: Library initialization complete.
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: [  2457] (ddci_init) Done.  Returning 0
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: [  2457] Starting ddca_start_watch_displays()
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: Watching for DPMS state changes unimplemented
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: [  2457] Watching for DPMS state changes unimplemented
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: [  2457] Watching for display connection changes, resolved watch mode = Watch_Mode_Udev, poll loop interval = 500 millisec
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: [  2457]                                          extra_stabilization_millisec: 0,  stabilization_poll_millisec: 100
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: [  2457] libddcutil recheck thread 0x55c5faebad00 started
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: [  2457] libddcutil watch thread 0x55c5faefe4a0 started
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: [  2457] Done     ddca_start_watch_displays returning OK - OK(0): success
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: [  2457] (ddca_get_display_refs) Returned DDCA_Display_Ref list:
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: [  2474] (dw_recheck_displays_func) Recheck interval: Sleeping for 200 milliseconds
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: Failed to register with host portal QDBusError("org.freedesktop.portal.Error.Failed", "Could not register app ID: App info not found for '
org.kde.org_kde_powerdevil'")
3月 26 08:23:50 archlinux org_kde_powerdevil[2457]: Handle button events action could not check for screen configuration
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2475] Udev event detected
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2475] Adding connected display with bus 3
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2475] Unable to open Display_Path[/dev/i2c-3]: EACCES(-13): 权限不够
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2475] ddc_initial_checks_by_dref() returned Error_Info[EACCES in ddc_open_display, causes: EACCES]
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2475] Emitting DDCA_Display_Status_Event[  7.839:  DDCA_EVENT_DISPLAY_CONNECTED, card1-eDP-1, dref: DDCA_Display_Ref[3], io_path:/dev/i2c-3, ddc wo
rking: false]
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2475] Starting 1 callback threads
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2475] libddcutil callback thread 0x7fedb402ad90 started
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2475] Started 1 event callback thread(s)
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2634] Invoking callback function 0x7fede58327f0 for event DDCA_Display_Status_Event[  7.839:  DDCA_EVENT_DISPLAY_CONNECTED, card1-eDP-1, dref: DDCA
_Display_Ref[3], io_path:/dev/i2c-3, ddc working: false] in this thread [  2634]
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2474] Unable to open Display_Path[/dev/i2c-3]: EACCES(-13): 权限不够
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2474] (dw_recheck_displays_func) Recheck interval: Sleeping for 200 milliseconds
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2634] Callback function 0x7fede58327f0 for event DDCA_Display_Status_Event[  7.839:  DDCA_EVENT_DISPLAY_CONNECTED, card1-eDP-1, dref: DDCA_Display_
Ref[3], io_path:/dev/i2c-3, ddc working: false] complete
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2457] Quiescing libddcutil API...
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2457] Quiesce libddcutil API complete
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2475] Udev event detected
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2457] Display redetection starting.
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2474] recheck thread terminating because watch thread terminated
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2457] Watch thread terminated.
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: [  2457] Unable to open Display_Path[/dev/i2c-3]: EACCES(-13): 权限不够
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: Display change detection requires RW access to all I2C buses that might be used for DDC.
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]: org_kde_powerdevil: dw_main.c:559: dw_redetect_displays: 断言 "!err" 失败。
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-3, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-4, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-5, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-6, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-7, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-8, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-9, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-10, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-14, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-15, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-16, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-17, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:58 archlinux org_kde_powerdevil[2457]:    Open failed for /dev/i2c-18, errno=EACCES(-13): 权限不够 in file i2c_bus_core.c near line 219
3月 26 08:23:59 archlinux org_kde_powerdevil[2457]: KCrash: Attempting to start /usr/lib/org_kde_powerdevil
3月 26 08:23:59 archlinux org_kde_powerdevil[2457]: KCrash: Application 'org_kde_powerdevil' crashing... crashRecursionCounter = 2
3月 26 08:23:59 archlinux org_kde_powerdevil[2635]: Starting libddcutil. library built Not set at Not set. stdout_stderr_redirected=true
3月 26 08:23:59 archlinux org_kde_powerdevil[2647]: Starting libddcutil. library built Not set at Not set. stdout_stderr_redirected=true
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: Starting. library built Not set at Not set, library_initialized=false, libopts=|(null)|
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: Initializing libddcutil.  ddcutil version: 2.2.6, shared library: /usr/lib/libddcutil.so.5.5.0
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]:                           library built Not set at Not set. stdout_stderr_redirected=true
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: [  2647] Options passed from client:
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: [  2647] Applying combined libddcutil options:
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: Library initialization complete.
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: [  2647] (ddci_init) Done.  Returning 0
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: [  2647] Starting ddca_start_watch_displays()
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: Watching for DPMS state changes unimplemented
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: [  2647] Watching for DPMS state changes unimplemented
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: [  2647] Watching for display connection changes, resolved watch mode = Watch_Mode_Udev, poll loop interval = 500 millisec
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: [  2647]                                          extra_stabilization_millisec: 0,  stabilization_poll_millisec: 100
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: [  2647] libddcutil recheck thread 0x5628d8e82b60 started
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: [  2647] libddcutil watch thread 0x5628d8e55ca0 started
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: [  2647] Done     ddca_start_watch_displays returning OK - OK(0): success
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: [  2647] (ddca_get_display_refs) Returned DDCA_Display_Ref list:
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: [  2814] (dw_recheck_displays_func) Recheck interval: Sleeping for 200 milliseconds
3月 26 08:24:04 archlinux org_kde_powerdevil[2647]: Failed to register with host portal QDBusError("org.freedesktop.portal.Error.Failed", "Could not register app ID: App info not found for '
org.kde.org_kde_powerdevil'")
3月 26 08:24:05 archlinux org_kde_powerdevil[2647]: Handle button events action could not check for screen configuration

Thank you for your reply. This is the output of 'Journalctl - t org_kde_powerdevil'.
There is a small portion of Chinese inside, and the translation of '权限不够' is' insufficient permissions'

[v8wzge]

I have tried to add the user to the i2c group, but the output result has not changed except for the time,

[rockowitz]

There are two things going on here. The first is the assert() failure that caused the crash and which should be addressed in branch 2.2.7-dev.

The second are the EACCES failures. This is not a matter of invalid assigned permissions (UDEV uaccess tag and/or group i2c membership). Rather, under some (to me, at least) unpredictable circumstances, permission to the /dev/i2c devices is lost. I've added code to dump diagnostics to the system log if open() fails with error EACCES.

If you can, please build from branch 2.2.7-dev. If you encounter a permissions failure, submit the relevant journalctl -t org_kde_powerdevil output (beginning with "Starting libddcutil"). If there is a crash, then submit both the crash dump and the journalctl output. If these are at all large, please submit as attachments rather than inline, as long inline attachments make an issue thread hard to follow. Thank you.