Thanks, it doesn't seem to find the device for some reason. Does the webcam 
work in other softwares?
Also note that the -d option doesn't take a device path, see

** Bug watch added: #4

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  Cheese refuses to use webcam

Status in cheese package in Ubuntu:

Bug description:

  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 

  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
                Extended Pix Format
                Device Capabilities
        Device Caps      : 0x05200001
                Video Capture
                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 
                             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.
  ProblemType: Bug
  ApportVersion: 2.20.11-0ubuntu21
  Architecture: amd64
  DistroRelease: Ubuntu 20.04
  InstallationDate: Installed on 2020-03-23 (1 days ago)
  InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Alpha amd64 (20200315)
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  Package: cheese 3.34.0-1build1
  PackageArchitecture: amd64
  ProcVersionSignature: Ubuntu 5.4.0-18.22-generic 5.4.24
   cheese        3.34.0-1build1
   cheese-common 3.34.0-1build1
  Tags:  focal gstreamer-error
  Uname: Linux 5.4.0-18-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm cdrom dip lpadmin lxd plugdev sambashare sudo video
  _MarkForUpload: True 07/09/2018
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: PYBSWCEL.86A.0074.2018.0709.1332 NUC5CPYB
  dmi.board.vendor: Intel Corporation
  dmi.board.version: H61145-413
  dmi.chassis.type: 3

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