Description of problem: At the moment of disconnecting an external USB webcamera Gnome crashed. ABRT failed to create a bugzilla ticket, saying backtrace is unusable. Still Problem Reporting is encouraging to report the bug. Version-Release number of selected component (if applicable): gnome-shell-3.26.2-4.fc27.x86_64 How reproducible: Let the USB webcamera (Bus 002 Device 016: ID 046d:085c Logitech, Inc.) be connected via USB hub (builtin of LCD panel LG). Switch on the PC, boot FC27 and after, login, open a few programs (terminal, Slack, Chromium) and disconnect webcamera. Steps to Reproduce: 1. Connect webcamera via USB hub 2. Boot FC27, up to date with updates-testing 3. Login 4. Open terminal, Slack, Chromium 5. Disconnect the webcamera Actual results: gnome-shell crashed. ABRT failed to create a bugzilla ticket, saying backtrace is unusable. Still Problem Reporting is encouraging to report the bug. Expected results: gnome-shell not crashing. (minor issue: ABRT being able to report the bug.) Additional info: Compressed /var/spool/abrt/ccpp-2018-03-25-00:11:30.110610-163 attached
Created attachment 1412658 [details] /var/spool/abrt/ccpp-2018-03-25-00:11:30.110610-163 coredump omitted, as it would not fit the size limit of bugzilla
Backtrace generated locally.
Fedora 28 is affected as well.
rpm -q gnome-shell gnome-shell-3.28.0-1.fc28.x86_64
Created upstream bug report: https://gitlab.gnome.org/GNOME/gnome-shell/issues/178
Version gnome-shell-3.28.1-1.fc28.x86_64 is still affected. Related excerpt from journal: Apr 06 11:54:24 n51 kernel: usb 2-1.2.3: USB disconnect, device number 9 Apr 06 11:54:24 n51 upowerd[1130]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2.3/2-1.2.3:1.1 Apr 06 11:54:24 n51 upowerd[1130]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2.3/2-1.2.3:1.0 Apr 06 11:54:24 n51 upowerd[1130]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2.3/2-1.2.3:1.3 Apr 06 11:54:24 n51 gsd-media-keys[1320]: Unable to get default source Apr 06 11:54:24 n51 upowerd[1130]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2.3/2-1.2.3:1.2 Apr 06 11:54:24 n51 gnome-shell[5522]: Removed: 6 Apr 06 11:54:24 n51 gnome-shell[5522]: Device removed, but not hiding as its set to be shown always Apr 06 11:54:24 n51 gnome-shell[5522]: Removed: 7 Apr 06 11:54:24 n51 upowerd[1130]: unhandled action 'unbind' on /sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.2/2-1.2.3 Apr 06 11:54:24 n51 gnome-shell[5522]: Device removed, but not hiding as its set to be shown always Apr 06 11:54:25 n51 audit[5522]: ANOM_ABEND auid=1000 uid=1000 gid=1000 ses=4 subj=unconfined_u:unconfined_r:unconfined_t:s0-s0:c0.c1023 pid=5522 comm="gnome-shell" exe="/usr/bin/gnome-shell" sig=11 res=1 Apr 06 11:54:25 n51 kernel: gnome-shell[5522]: segfault at 0 ip 00007f30b55adc94 sp 00007ffec47a11d8 error 4 in libgvc.so[7f30b559a000+1c000] Apr 06 11:54:25 n51 gnome-shell[5522]: gvc_mixer_card_get_profile: assertion 'GVC_IS_MIXER_CARD (card)' failed Apr 06 11:54:25 n51 systemd[1]: Started Process Core Dump (PID 9304/UID 0). Apr 06 11:54:25 n51 audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:init_t:s0 msg='unit=systemd-coredump@1-9304-0 comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success' Apr 06 11:54:32 n51 gnome-terminal-[7830]: Error reading events from display: Broken pipe
This message is a reminder that Fedora 28 is nearing its end of life. On 2019-May-28 Fedora will stop maintaining and issuing updates for Fedora 28. It is Fedora's policy to close all bug reports from releases that are no longer maintained. At that time this bug will be closed as EOL if it remains open with a Fedora 'version' of '28'. Package Maintainer: If you wish for this bug to remain open because you plan to fix it in a currently maintained version, simply change the 'version' to a later Fedora version. Thank you for reporting this issue and we are sorry that we were not able to fix it before Fedora 28 is end of life. If you would still like to see this bug fixed and are able to reproduce it against a later version of Fedora, you are encouraged change the 'version' to a later Fedora version prior this bug is closed as described in the policy above. Although we aim to fix as many bugs as possible during every release's lifetime, sometimes those efforts are overtaken by events. Often a more recent Fedora release includes newer upstream software that fixes bugs or makes them obsolete.
Fedora 28 changed to end-of-life (EOL) status on 2019-05-28. Fedora 28 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.
FWIW, it was a bug caused by a audio device chooser extension. It might be ultimately caused by gnome-shell, but the author of the extension is expected to provide a reproducer for the bug, so we can find a solution for that crash. See https://gitlab.gnome.org/GNOME/libgnome-volume-control/issues/9