刚刚购买了 logi c920e，不幸的是它似乎无法工作。
其他用户的问题都没有帮助，大多数都与内置凸轮有关，这不是我的情况。我已经在 Fedora、Linux Mint、Manjaro（当前操作系统）上进行了测试，但似乎都不起作用。
尝试安装Windows 10，成功。
！网络摄像头不会显示更多信息，无论是有关奶酪、obs 还是 vlc。我仍在寻找更多信息，随着情况的发展，我将在这里添加。
dmesg |尾巴
dmesg | tail
[ 82.553845] audit: type=1101 audit(1637396188.080:103): pid=2438 uid=1000 auid=1000 ses=2 subj==unconfined msg='op=PAM:accounting grantors=pam_unix,pam_permit,pam_time acct="kaiqueam" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[ 82.554104] audit: type=1110 audit(1637396188.080:104): pid=2438 uid=1000 auid=1000 ses=2 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[ 82.557650] audit: type=1105 audit(1637396188.083:105): pid=2438 uid=1000 auid=1000 ses=2 subj==unconfined msg='op=PAM:session_open grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[ 82.565367] audit: type=1106 audit(1637396188.090:106): pid=2438 uid=1000 auid=1000 ses=2 subj==unconfined msg='op=PAM:session_close grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[ 82.565459] audit: type=1104 audit(1637396188.090:107): pid=2438 uid=1000 auid=1000 ses=2 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[ 94.652318] audit: type=1101 audit(1637396200.177:108): pid=2457 uid=1000 auid=1000 ses=2 subj==unconfined msg='op=PAM:accounting grantors=pam_unix,pam_permit,pam_time acct="kaiqueam" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[ 94.652622] audit: type=1110 audit(1637396200.177:109): pid=2457 uid=1000 auid=1000 ses=2 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[ 94.656734] audit: type=1105 audit(1637396200.183:110): pid=2457 uid=1000 auid=1000 ses=2 subj==unconfined msg='op=PAM:session_open grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[ 94.665469] audit: type=1106 audit(1637396200.190:111): pid=2457 uid=1000 auid=1000 ses=2 subj==unconfined msg='op=PAM:session_close grantors=pam_limits,pam_unix,pam_permit acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
[ 94.665608] audit: type=1104 audit(1637396200.190:112): pid=2457 uid=1000 auid=1000 ses=2 subj==unconfined msg='op=PAM:setcred grantors=pam_faillock,pam_permit,pam_env,pam_faillock acct="root" exe="/usr/bin/sudo" hostname=? addr=? terminal=/dev/pts/2 res=success'
v4l2-ctl --列表设备
v4l2-ctl --list-devices
Cannot open device /dev/video0, exiting.
v4l2-ctl --all
Cannot open device /dev/video0, exiting.
须藤 dmesg | grep -i 相机 -> 不返回任何内容
sudo dmesg | grep -i camera
LSSB
lsusb
Bus 006 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 005 Device 006: ID 8087:0025 Intel Corp. Wireless-AC 9260 Bluetooth Adapter
Bus 005 Device 004: ID 1462:7b85 Micro Star International PRO CARBON
Bus 005 Device 003: ID 046d:083f Logitech, Inc. USB VSNx
Bus 005 Device 002: ID 05ac:024f Apple, Inc. Aluminium Keyboard (ANSI)
Bus 005 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
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 003: ID 046d:c53f Logitech, Inc. USB Receiver
Bus 001 Device 002: ID 0951:1666 Kingston Technology DataTraveler 100 G3/G4/SE9 G2/50
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
lspci
❯ lspci
00:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Root Complex
00:00.2 IOMMU: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) I/O Memory Management Unit
00:01.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge
00:01.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge
00:01.3 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge
00:02.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge
00:03.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge
00:03.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge
00:04.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge
00:07.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge
00:07.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B
00:08.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge
00:08.1 PCI bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B
00:14.0 SMBus: Advanced Micro Devices, Inc. [AMD] FCH SMBus Controller (rev 59)
00:14.3 ISA bridge: Advanced Micro Devices, Inc. [AMD] FCH LPC Bridge (rev 51)
00:18.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 0
00:18.1 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 1
00:18.2 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 2
00:18.3 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 3
00:18.4 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 4
00:18.5 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 5
00:18.6 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 6
00:18.7 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Data Fabric: Device 18h; Function 7
01:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983
03:00.0 USB controller: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset USB 3.1 XHCI Controller (rev 01)
03:00.1 SATA controller: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset SATA Controller (rev 01)
03:00.2 PCI bridge: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Bridge (rev 01)
20:00.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port (rev 01)
20:01.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port (rev 01)
20:04.0 PCI bridge: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset PCIe Port (rev 01)
21:00.0 Network controller: Intel Corporation Wireless-AC 9260 (rev 29)
22:00.0 Ethernet controller: Intel Corporation I211 Gigabit Network Connection (rev 03)
26:00.0 VGA compatible controller: NVIDIA Corporation TU104 [GeForce RTX 2060] (rev a1)
26:00.1 Audio device: NVIDIA Corporation TU104 HD Audio Controller (rev a1)
26:00.2 USB controller: NVIDIA Corporation TU104 USB 3.1 Host Controller (rev a1)
26:00.3 Serial bus controller [0c80]: NVIDIA Corporation TU104 USB Type-C UCSI Controller (rev a1)
27:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Zeppelin/Raven/Raven2 PCIe Dummy Function
27:00.2 Encryption controller: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) Platform Security Processor
27:00.3 USB controller: Advanced Micro Devices, Inc. [AMD] Zeppelin USB 3.0 Host controller
28:00.0 Non-Essential Instrumentation [1300]: Advanced Micro Devices, Inc. [AMD] Zeppelin/Renoir PCIe Dummy Function
28:00.2 SATA controller: Advanced Micro Devices, Inc. [AMD] FCH SATA Controller [AHCI mode] (rev 51)
28:00.3 Audio device: Advanced Micro Devices, Inc. [AMD] Family 17h (Models 00h-0fh) HD Audio Controller
lsmod
❯ lsmod
Module Size Used by
rfcomm 90112 16
ccm 20480 6
cmac 16384 3
algif_hash 16384 1
algif_skcipher 16384 1
af_alg 32768 6 algif_hash,algif_skcipher
bnep 32768 2
btusb 69632 0
btrtl 28672 1 btusb
btbcm 20480 1 btusb
btintel 32768 1 btusb
bluetooth 733184 43 btrtl,btintel,btbcm,bnep,btusb,rfcomm
ecdh_generic 16384 2 bluetooth
ecc 40960 1 ecdh_generic
hid_logitech_hidpp 53248 0
joydev 28672 0
mousedev 24576 0
hid_apple 16384 0
hid_logitech_dj 28672 0
uas 32768 0
qrtr 20480 4
ns 36864 1 qrtr
iwlmvm 495616 0
usb_storage 81920 2 uas
usbhid 65536 1 hid_logitech_dj
apple_mfi_fastcharge 20480 0
mac80211 1171456 1 iwlmvm
libarc4 16384 1 mac80211
iwlwifi 430080 1 iwlmvm
cfg80211 1044480 3 iwlmvm,iwlwifi,mac80211
igb 266240 0
i2c_algo_bit 16384 1 igb
rfkill 32768 9 bluetooth,cfg80211
dca 16384 1 igb
intel_rapl_msr 20480 0
uinput 20480 0
squashfs 69632 8
intel_rapl_common 28672 1 intel_rapl_msr
nvidia_drm 73728 9
edac_mce_amd 32768 0
snd_hda_codec_realtek 155648 1
nvidia_modeset 1155072 24 nvidia_drm
kvm_amd 139264 0
snd_hda_codec_generic 98304 1 snd_hda_codec_realtek
snd_hda_codec_hdmi 73728 1
ccp 118784 1 kvm_amd
ledtrig_audio 16384 1 snd_hda_codec_generic
ucsi_ccg 24576 0
typec_ucsi 49152 1 ucsi_ccg
rng_core 16384 1 ccp
snd_hda_intel 57344 5
typec 65536 1 typec_ucsi
snd_intel_dspcfg 28672 1 snd_hda_intel
kvm 1036288 1 kvm_amd
nvidia 36958208 1376 nvidia_modeset
snd_intel_sdw_acpi 20480 1 snd_intel_dspcfg
snd_hda_codec 176128 4 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec_realtek
irqbypass 16384 1 kvm
vfat 24576 1
crct10dif_pclmul 16384 1
crc32_pclmul 16384 0
roles 16384 1 typec_ucsi
wmi_bmof 16384 0
fat 86016 1 vfat
snd_hda_core 110592 5 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek
ghash_clmulni_intel 16384 0
drm_kms_helper 294912 1 nvidia_drm
snd_hwdep 16384 1 snd_hda_codec
aesni_intel 380928 8
snd_pcm 147456 4 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec,snd_hda_core
cec 73728 1 drm_kms_helper
crypto_simd 16384 1 aesni_intel
cryptd 28672 3 crypto_simd,ghash_clmulni_intel
rapl 16384 0
syscopyarea 16384 1 drm_kms_helper
snd_timer 45056 1 snd_pcm
sysfillrect 16384 1 drm_kms_helper
sysimgblt 16384 1 drm_kms_helper
snd 114688 18 snd_hda_codec_generic,snd_hda_codec_hdmi,snd_hwdep,snd_hda_intel,snd_hda_codec,snd_hda_codec_realtek,snd_timer,snd_pcm
pcspkr 16384 0
k10temp 16384 0
sp5100_tco 20480 0
i2c_piix4 28672 0
soundcore 16384 1 snd
fb_sys_fops 16384 1 drm_kms_helper
i2c_nvidia_gpu 16384 0
wmi 36864 1 wmi_bmof
drm 589824 13 drm_kms_helper,nvidia,nvidia_drm
gpio_amdpt 20480 0
mac_hid 16384 0
pinctrl_amd 32768 0
gpio_generic 20480 1 gpio_amdpt
acpi_cpufreq 32768 0
agpgart 45056 1 drm
loop 40960 16
ipmi_devintf 20480 0
ipmi_msghandler 73728 1 ipmi_devintf
sg 40960 0
fuse 167936 7
crypto_user 20480 0
ip_tables 32768 0
x_tables 53248 1 ip_tables
ext4 929792 2
crc32c_generic 16384 0
crc16 16384 2 bluetooth,ext4
mbcache 16384 1 ext4
jbd2 151552 1 ext4
crc32c_intel 24576 4
xhci_pci 20480 0
看看 obs，Linux 是否有可能认为这是一个麦克风？
❯ lsmod|grep uvcvideo
uvcvideo 118784 0
videobuf2_vmalloc 20480 1 uvcvideo
videobuf2_v4l2 36864 1 uvcvideo
videobuf2_common 69632 4 videobuf2_vmalloc,videobuf2_v4l2,uvcvideo,videobuf2_memops
videodev 282624 3 videobuf2_v4l2,uvcvideo,videobuf2_common
mc 65536 4 videodev,videobuf2_v4l2,uvcvideo,videobuf2_common
还尝试重新加载模块
sudo modprobe uvcvideo
根据上面的先前日志，仍然没有设备，也没有任何变化。
** 跑步：
sudo modprobe v4l2loopback
生成当时不存在的 de video0
❯ v4l2-ctl --list-devices
Dummy video device (0x0000) (platform:v4l2loopback-000):
/dev/video0
在 dev/ 中给出 LS 请注意，在 modprobe 之前没有任何 video0
❯ ls
ashmem hpet nvme0 stdout tty31 tty56 ttyS22 vcs3
autofs hugepages nvme0n1 tty tty32 tty57 ttyS23 vcs4
block hwrng nvme0n1p1 tty0 tty33 tty58 ttyS24 vcs5
bsg input nvme0n1p2 tty1 tty34 tty59 ttyS25 vcs6
btrfs-control kmsg nvme0n1p3 tty10 tty35 tty6 ttyS26 vcsa
bus kvm nvram tty11 tty36 tty60 ttyS27 vcsa1
char lightnvm port tty12 tty37 tty61 ttyS28 vcsa2
console log ppp tty13 tty38 tty62 ttyS29 vcsa3
core loop0 pps0 tty14 tty39 tty63 ttyS3 vcsa4
cpu loop1 psaux tty15 tty4 tty7 ttyS30 vcsa5
cpu_dma_latency loop2 ptmx tty16 tty40 tty8 ttyS31 vcsa6
cuse loop3 ptp0 tty17 tty41 tty9 ttyS4 vcsu
disk loop4 pts tty18 tty42 ttyS0 ttyS5 vcsu1
dma_heap loop5 random tty19 tty43 ttyS1 ttyS6 vcsu2
dri loop6 rfkill tty2 tty44 ttyS10 ttyS7 vcsu3
fb0 loop7 rtc tty20 tty45 ttyS11 ttyS8 vcsu4
fd loop8 rtc0 tty21 tty46 ttyS12 ttyS9 vcsu5
full loop-control sda tty22 tty47 ttyS13 udmabuf vcsu6
fuse mapper sda1 tty23 tty48 ttyS14 uhid vfio
gpiochip0 mem sdb tty24 tty49 ttyS15 uinput vga_arbiter
gpiochip1 mqueue sg0 tty25 tty5 ttyS16 urandom vhci
hidraw0 net sg1 tty26 tty50 ttyS17 usb vhost-net
hidraw1 ng0n1 shm tty27 tty51 ttyS18 userio vhost-vsock
hidraw2 null snapshot tty28 tty52 ttyS19 v4l2loopback video0
hidraw3 nvidia0 snd tty29 tty53 ttyS2 vcs watchdog
hidraw4 nvidiactl stderr tty3 tty54 ttyS20 vcs1 watchdog0
hidraw5 nvidia-modeset stdin tty30 tty55 ttyS21 vcs2 zero
但这没有用。跑步 ：
❯ gphoto2 --stdout --capture-movie | ffmpeg -i - -c:v rawvideo -f v4l2 /dev/video0
ffmpeg version n4.4.1 Copyright (c) 2000-2021 the FFmpeg developers
built with gcc 11.1.0 (GCC)
configuration: --prefix=/usr --disable-debug --disable-static --disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm --enable-lto --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libdav1d --enable-libdrm --enable-libfreetype --enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack --enable-libmfx --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librav1e --enable-librsvg --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2 --enable-libxvid --enable-libzimg --enable-nvdec --enable-nvenc --enable-shared --enable-version3
libavutil 56. 70.100 / 56. 70.100
libavcodec 58.134.100 / 58.134.100
libavformat 58. 76.100 / 58. 76.100
libavdevice 58. 13.100 / 58. 13.100
libavfilter 7.110.100 / 7.110.100
libswscale 5. 9.100 / 5. 9.100
libswresample 3. 9.100 / 3. 9.100
libpostproc 55. 9.100 / 55. 9.100
*** Error ***
Could not detect any camera
*** Error (-105: 'Unknown model') ***
pipe:: Invalid data found when processing input
答案1
此前，罗技 HD Pro C920 曾有多个不同的 USB 产品 ID，如 082d、0892 和 08e5，这可能表明相机内部结构的不同版本，尽管型号保持不变。现在您的网络摄像头的产品 ID 为 083f，Linux USB ID 存储库根本不知道该 ID：https://usb-ids.gowdy.us/read/UD/046d
另外，为它显示的文本lsusb有点奇怪Logitech, Inc. USB VSNx。
不幸的是，看起来 c920e 可能是驱动程序尚不知道的另一个新版本uvcvideo。或者，可能需要在每次重新启动后操作系统将固件发送到摄像头，然后摄像头才会显示为普通的网络摄像头设备。
不同 Logitech C920 变体的比较是从 Windows 用户的角度编写的，但似乎证实了 C920e 与旧版本相比可能存在一些技术差异：例如默认情况下禁用麦克风。
该uvcvideo驱动程序实际上会连接到任何声称属于适当 USB 设备类的设备，但它也会识别特定的相机，因为其中一些相机要么无法使用通用方法检测到，要么有一些需要特殊处理的怪癖。
由于驱动程序似乎没有检测到您的相机，因此相机可能以某种非标准方式将自己呈现给 USB 总线，这需要由uvcvideo驱动程序维护人员专门处理。
使用我的 Logitech C922，如果我运行lsusb -d 046d:085c -v |grep -e Class -e Config，我将得到以下输出：
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2
bNumConfigurations 1
Configuration Descriptor:
bConfigurationValue 1
iConfiguration 0
bFunctionClass 14 Video
bFunctionSubClass 3 Video Interface Collection
bInterfaceClass 14 Video
bInterfaceSubClass 1 Video Control
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bInterfaceClass 14 Video
bInterfaceSubClass 2 Video Streaming
bFunctionClass 1 Audio
bFunctionSubClass 2 Streaming
bInterfaceClass 1 Audio
bInterfaceSubClass 1 Control Device
wChannelConfig 0x0003
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bDeviceClass 239 Miscellaneous Device
bDeviceSubClass 2
bNumConfigurations 1
请注意音频和视频控制接口的存在，以及用于音频和视频的许多不同的流接口。
如果你跑步lsusb -d 046d:083f -v | grep -e Class -e Config，你会得到类似的东西吗？
如果bNumConfigurations的值不是 1，则相机可能需要切换到备用 USB 配置才能用作相机。
（某些 USB 设备最初会将自己呈现为 USB 存储设备，其中包含设备的 Windows/Mac 驱动程序。然后驱动程序会知道将设备切换到备用配置，从而显示真实的设备接口。）
答案2
您也可以将插头拔出，然后重新插入。有时它对我有用。我做的另一件事是关闭一些在后台运行的东西。 IE
ps aux | grep python3sudo kill -9 <the id given besides the roots>