The backtrace unfortunately doesn't provide any information that points
to how this could be a systemd problem.  The crashing thread appears to
be:

Thread 12 (Thread 0x7f50a9f2e640 (LWP 282533) "ThreadPoolServi"):
#1  0x00007f50de277845 in buffered_vfprintf (s=0x7f50de41a6a0 
<_IO_2_1_stderr_>, format=format@entry=0x7f50c74e8c85 "[%s] %s\n", 
args=args@entry=0x7f50a9f1c1e0, mode_flags=mode_flags@entry=2) at 
./stdio-common/vfprintf-internal.c:2265
#2  0x00007f50de2766de in __vfprintf_internal (s=<optimized out>, 
format=0x7f50c74e8c85 "[%s] %s\n", ap=ap@entry=0x7f50a9f1c1e0, mode_flags=2) at 
./stdio-common/vfprintf-internal.c:1236
#3  0x00007f50de334ec3 in ___fprintf_chk (fp=<optimized out>, flag=<optimized 
out>, format=<optimized out>) at ./debug/fprintf_chk.c:33
#4  0x00007f50c74cd37e in event_logv_ () at 
/lib/x86_64-linux-gnu/libevent-2.1.so.7
#5  0x00007f50c74cd549 in event_warn () at 
/lib/x86_64-linux-gnu/libevent-2.1.so.7
#6  0x00007f50c74d223c in  () at /lib/x86_64-linux-gnu/libevent-2.1.so.7
#7  0x00007f50c74c95d1 in event_base_loop () at 
/lib/x86_64-linux-gnu/libevent-2.1.so.7
#8  0x00007f50d357c624 in  () at /lib/x86_64-linux-gnu/libQt5WebEngineCore.so.5

since we don't see the format string arguments, this doesn't tell us
what's being printed that's a problem or how it could be systemd-
related.

I'm attaching the /lib/udev/rules.d/60-persistent-storage.rules from the
previous version of systemd, 249.11-0ubuntu3.9.  Since this is the only
change in the new version affecting udev, even though we don't see how
it would break your devices, we should test whether reverting this fixes
your problem.

Please download the attached file and run the following commands:

sudo cp -a /lib/udev/rules.d/60-persistent-storage.rules{,.bak}
sudo mv 60-persistent-storage.rules 
/lib/udev/rules.d/60-persistent-storage.rules

Then reboot and report whether this has fixed your problem.

If it has not, we can walk you through a full manual rollback of the
systemd package on your system.

** Attachment added: "60-persistent-storage.rules"
   
https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/2035406/+attachment/5700985/+files/60-persistent-storage.rules

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to systemd in Ubuntu.
https://bugs.launchpad.net/bugs/2035406

Title:
  udev update has broken ubuntu's ability to import photos in digikam,
  gphoto2 can no longer see usb camera, entangle can no longer see
  camera

Status in systemd package in Ubuntu:
  Invalid
Status in systemd source package in Jammy:
  Incomplete
Status in systemd source package in Lunar:
  Invalid
Status in systemd source package in Mantic:
  Invalid

Bug description:
  udev update has broken ubuntu's ability to import photos in digikam, gphoto2 
can no longer see usb camera, entangle can no longer see camera 
  after Upgrade: udev:amd64 (249.11-0ubuntu3.9, 249.11-0ubuntu3.10), 
systemd-timesyncd:amd64 (249.11-0ubuntu3.9, 249.11-0ubuntu3.10), 
libpam-systemd:amd64 (249.11-0ubuntu3.9, 249.11-0ubuntu3.10), 
libpam-systemd:i386 (249.11-0ubuntu3.9, 249.11-0ubuntu3.10), libsystemd0:amd64 
(249.11-0ubuntu3.9, 249.11-0ubuntu3.10), libsystemd0:i386 (249.11-0ubuntu3.9, 
249.11-0ubuntu3.10), libnss-systemd:amd64 (249.11-0ubuntu3.9, 
249.11-0ubuntu3.10), libudev-dev:amd64 (249.11-0ubuntu3.9, 249.11-0ubuntu3.10), 
systemd:amd64 (249.11-0ubuntu3.9, 249.11-0ubuntu3.10), libudev1:amd64 
(249.11-0ubuntu3.9, 249.11-0ubuntu3.10), libudev1:i386 (249.11-0ubuntu3.9, 
249.11-0ubuntu3.10), systemd-sysv:amd64 (249.11-0ubuntu3.9, 249.11-0ubuntu3.10) 
ubuntu no longer allows gphoto2 or entangle control of my dslr, lsusb sees the 
camera fine, but the upgrade broke the usage, and cant roll back shows it will 
break system to roll back please fix ASAP.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: udev 249.11-0ubuntu3.10
  ProcVersionSignature: Ubuntu 6.2.0-1009.9~22.04.1-lowlatency 6.2.13
  Uname: Linux 6.2.0-1009-lowlatency x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: KDE
  Date: Wed Sep 13 18:16:14 2023
  InstallationDate: Installed on 2023-08-23 (21 days ago)
  InstallationMedia: Ubuntu-Studio 22.04.3 LTS "Jammy Jellyfish" - Release 
amd64 (20230807)
  MachineType: Alienware Alienware 18
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-6.2.0-1009-lowlatency 
root=UUID=17502284-0952-44fe-81f8-54cebffc3800 ro threadirqs quiet splash 
vt.handoff=1
  SourcePackage: systemd
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 07/22/2019
  dmi.bios.vendor: Alienware
  dmi.bios.version: A15
  dmi.board.name: 0FT9KT
  dmi.board.vendor: Alienware
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Alienware
  dmi.chassis.version: A15
  dmi.ec.firmware.release: 1.1
  dmi.modalias: 
dmi:bvnAlienware:bvrA15:bd07/22/2019:efr1.1:svnAlienware:pnAlienware18:pvrA15:rvnAlienware:rn0FT9KT:rvrA00:cvnAlienware:ct8:cvrA15:skuAlienware18:
  dmi.product.family: 00
  dmi.product.name: Alienware 18
  dmi.product.sku: Alienware 18
  dmi.product.version: A15
  dmi.sys.vendor: Alienware

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