Snapshot cannot detect laptop camera

[Islam]

It say no camera found, while the Cheese app can detect it fine.

# lsusb
Bus 003 Device 003: ID 13d3:56eb IMC Networks USB2.0 HD UVC WebCam

ProblemType: Bug
DistroRelease: Ubuntu 24.04
Package: gnome-snapshot 46.0-1ubuntu2
ProcVersionSignature: Ubuntu 6.8.0-22.22-generic 6.8.1
Uname: Linux 6.8.0-22-generic x86_64
ApportVersion: 2.28.0-0ubuntu1
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 14 13:31:16 2024
InstallationDate: Installed on 2024-03-22 (23 days ago)
InstallationMedia: Ubuntu 23.10.1 "Mantic Minotaur" - Release amd64 (20231016.1)
ProcEnviron:
 LANG=en_US.UTF-8
 PATH=(custom, no user)
 SHELL=/bin/bash
 TERM=xterm-256color
 XDG_RUNTIME_DIR=<set>
SourcePackage: gnome-snapshot
UpgradeStatus: Upgraded to noble on 2024-04-11 (3 days ago)

[Sebastien Bacher (seb128)]

Thank you for your bug report. It seems similar to bug #2060390,

could you get the output of

$ pw-dump | grep default.video.source

and

$ gst-device-monitor-1.0 Video/Source

?

[Islam (islam)]

You are welcome.

$ pw-dump | grep default.video.source
$ gst-device-monitor-1.0 Video/Source
Probing devices...

[23:15:51.024474600] [158497] WARN IPAManager ipa_manager.cpp:154 No IPA found in '/usr/lib/x86_64-linux-gnu/libcamera'
[23:15:51.024569248] [158497] INFO Camera camera_manager.cpp:284 libcamera v0.2.0

Device found:

 name : \_SB_.PC00.XHCI.RHUB.HS05-5:1.0-13d3:56eb
 class : Source/Video
 caps : image/jpeg, width=160, height=120
         image/jpeg, width=176, height=144
         image/jpeg, width=320, height=240
         image/jpeg, width=352, height=288
         image/jpeg, width=640, height=480
         image/jpeg, width=1280, height=720
         video/x-raw, format=YUY2, width=160, height=120
         video/x-raw, format=YUY2, width=176, height=144
         video/x-raw, format=YUY2, width=320, height=240
         video/x-raw, format=YUY2, width=352, height=288
         video/x-raw, format=YUY2, width=640, height=480
         video/x-raw, format=YUY2, width=1280, height=720
 gst-launch-1.0 libcamerasrc camera-name="\\_SB_.PC00.XHCI.RHUB.HS05-5:1.0-13d3:56eb" ! ...

[Marius Gedminas (mgedmin)]

Probably a duplicate of bug 2061687, given the empty pw-dump output. Does systemctl --user restart wireplumber.service fix it for the remainder of the login session?

[Islam (islam)]

Yes.

The first time I launched Snapshot after restarting that service, it crashed.

The second time, it worked fine and detected the camera:
$ snapshot
2024-05-08T20:56:32.905621Z INFO snapshot::application::imp: Snapshot (org.gnome.Snapshot)
2024-05-08T20:56:32.905639Z INFO snapshot::application::imp: Version: 46.2
2024-05-08T20:56:32.905643Z INFO snapshot::application::imp: Datadir: /usr/share/snapshot

** (gst-plugin-scanner:90717): CRITICAL **: 23:56:32.997: _dma_fmt_to_dma_drm_fmts: assertion 'fmt != GST_VIDEO_FORMAT_UNKNOWN' failed

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.