Public bug reported:
Hi,
I have a USB webcam attached to my ubuntu machine:
Bus 001 Device 002: ID 0c45:600d Microdia TwinkleCam USB camera
this device uses gspca_sonixb:
gilbahat@meadow:~$ lsmod | grep gspca
gspca_sonixb 20480 0
gspca_main 24576 1 gspca_sonixb
videobuf2_vmalloc 20480 1 gspca_main
videobuf2_v4l2 24576 1 gspca_main
videobuf2_common 49152 2 gspca_main,videobuf2_v4l2
videodev 225280 4
gspca_main,videobuf2_v4l2,videobuf2_common,gspca_sonixb
the device passes v4l2 tests:
$ v4l2-ctl -d /dev/video0 --all
Driver Info:
Driver name : sonixb
Card type : USB camera
Bus info : usb-0000:00:14.0-1
Driver version : 5.4.24
Capabilities : 0x85200001
Video Capture
Read/Write
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x05200001
Video Capture
Read/Write
Streaming
Extended Pix Format
Priority: 2
Video input : 0 (sonixb: ok)
Format Video Capture:
Width/Height : 352/288
Pixel Format : 'S910' (GSPCA SN9C10X)
Field : None
Bytes per Line : 352
Size Image : 126720
Colorspace : sRGB
Transfer Function : Default (maps to sRGB)
YCbCr/HSV Encoding: Default (maps to ITU-R 601)
Quantization : Default (maps to Full Range)
Flags :
Streaming Parameters Video Capture:
Frames per second: invalid (0/0)
Read buffers : 2
User Controls
brightness 0x00980900 (int) : min=0 max=255 step=1
default=127 value=127 flags=slider
exposure 0x00980911 (int) : min=0 max=1023 step=1
default=66 value=66 flags=inactive
gain_automatic 0x00980912 (bool) : default=1 value=1
flags=update
gain 0x00980913 (int) : min=0 max=31 step=1
default=15 value=15 flags=inactive
the device even works with vlc when opened as a v4l2 capture device and
picture is detected and displayed.
however, cheese just insists there is no webcam installed, even when run
with -d /dev/video0 on the command line.
system details:
$ lsb_release -rd
Description: Ubuntu Focal Fossa (development branch)
Release: 20.04
$ dpkg -l | grep cheese
ii cheese 3.34.0-1build1
amd64 tool to take pictures and videos from your webcam
expected behaviour:
/dev/video0 appears on the list of usable devices and cheese uses it
observed behaviour:
cheese complains about no video devices being available.
** Affects: cheese (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1868919
Title:
Cheese refuses to use webcam
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