我遇到了这个奇怪的问题。当我去Google Meet我可以打开我的网络摄像头（有时）。当我无法使网络摄像头工作时，网络摄像头灯会一直闪烁（不断打开和关闭），但 Google Meet 上不会显示任何图像。我注意到，通常情况下，我可以在重新启动计算机后使用网络摄像头，但只能使用有限的时间。每当我打开 cheese 时，我都会得到以下信息：
(cheese:125582): GLib-CRITICAL **: 21:33:13.142: g_variant_get_type_string: assertion 'value != NULL' failed
(cheese:125582): GLib-GIO-CRITICAL **: 21:33:13.142: g_settings_set_value: key 'camera' in 'org.gnome.Cheese' expects type 's', but a GVariant of type '(null)' was given
(cheese:125582): GLib-CRITICAL **: 21:33:13.142: g_variant_unref: assertion 'value != NULL' failed
尝试使用 guvcview 也会出现同样的情况（没有任何图像）。摄像头正在列出
/dev/video 复制代码*
/dev/video0
/dev/video1
系统盘
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 1532:0255 Razer USA, Ltd Razer Blade
Bus 001 Device 123: ID 13d3:56bd IMC Networks USB Camera
Bus 001 Device 004: ID 8087:0026 Intel Corp.
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
正在做v4l2-ctl --device=/dev/video0 --all给我
Driver Info:
Driver name : uvcvideo
Card type : USB Camera: USB Camera
Bus info : usb-0000:00:14.0-7
Driver version : 5.8.18
Capabilities : 0x84a00001
Video Capture
Metadata Capture
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x04200001
Video Capture
Streaming
Extended Pix Format
Media Driver Info:
Driver name : uvcvideo
Model : USB Camera: USB Camera
Serial : 0x0001
Bus info : usb-0000:00:14.0-7
Media version : 5.8.18
Hardware revision: 0x00002001 (8193)
Driver version : 5.8.18
Interface Info:
ID : 0x03000002
Type : V4L Video
Entity Info:
ID : 0x00000001 (1)
Name : USB Camera: USB Camera
Function : V4L2 I/O
Flags : default
Pad 0x01000007 : 0: Sink
Priority: 2
Video input : 0 (Camera 1: ok)
Format Video Capture:
Width/Height : 1280/720
Pixel Format : 'MJPG' (Motion-JPEG)
Field : None
Bytes per Line : 0
Size Image : 1843200
Colorspace : sRGB
Transfer Function : Default (maps to sRGB)
YCbCr/HSV Encoding: Default (maps to ITU-R 601)
Quantization : Default (maps to Full Range)
Flags :
Crop Capability Video Capture:
Bounds : Left 0, Top 0, Width 1280, Height 720
Default : Left 0, Top 0, Width 1280, Height 720
Pixel Aspect: 1/1
Selection Video Capture: crop_default, Left 0, Top 0, Width 1280, Height 720, Flags:
Selection Video Capture: crop_bounds, Left 0, Top 0, Width 1280, Height 720, Flags:
Streaming Parameters Video Capture:
Capabilities : timeperframe
Frames per second: 30.000 (30/1)
Read buffers : 0
brightness 0x00980900 (int) : min=-127 max=127 step=1 default=0 value=0
contrast 0x00980901 (int) : min=0 max=100 step=1 default=50 value=50
saturation 0x00980902 (int) : min=0 max=100 step=1 default=64 value=64
hue 0x00980903 (int) : min=-180 max=180 step=1 default=0 value=0
white_balance_temperature_auto 0x0098090c (bool) : default=1 value=1
gamma 0x00980910 (int) : min=270 max=330 step=1 default=300 value=300
gain 0x00980913 (int) : min=0 max=8 step=1 default=0 value=0
power_line_frequency 0x00980918 (menu) : min=0 max=2 default=1 value=1
0: Disabled
1: 50 Hz
2: 60 Hz
white_balance_temperature 0x0098091a (int) : min=2800 max=6500 step=10 default=4600 value=4600 flags=inactive
sharpness 0x0098091b (int) : min=0 max=100 step=1 default=50 value=50
backlight_compensation 0x0098091c (int) : min=0 max=2 step=1 default=0 value=0
exposure_auto_priority 0x009a0903 (bool) : default=0 value=1
我尝试了 AskUbuntu、Ubuntu 论坛和 Reddit 帖子上找到的许多解决方案。不幸的是，似乎没有一个能起作用。有办法解决这个问题吗？