今天不知为何我发现我的网络摄像头和麦克风无法正常工作，我决定升级到 14.04（以此为借口，并假设升级后问题会消失）。可惜什么也没发生。
奇怪的是，笔记本电脑似乎不是无法识别网络摄像头和麦克风，但是*音频输出工作正常。
我能做些什么？
编辑1：hardinfo输入设备的输出：
-Input Devices-
Lid Switch
Sleep Button
Power Button
Power Button
AT Translated Set 2 keyboard
Microsoft Microsoft® 2.4GHz Transceiver v7.0
Microsoft Microsoft® 2.4GHz Transceiver v7.0
Microsoft Microsoft® 2.4GHz Transceiver v7.0
SynPS/2 Synaptics TouchPad
Video Bus
Video Bus
HDA Intel PCH HDMI/DP,pcm : 7=
HDA Intel PCH HDMI/DP,pcm : 3=
HDA Intel PCH Headphone
HDA Intel PCH Line Out
HDA Intel PCH Line
HDA Intel PCH Mic
编辑2：输出lsusb：
Bus 002 Device 003: ID 147e:1002 Upek Biometric Touchchip/Touchstrip Fingerprint Sensor
Bus 002 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:0024 Intel Corp. Integrated Rate Matching Hub
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 003: ID 8086:0189 Intel Corp.
Bus 003 Device 002: ID 045e:0745 Microsoft Corp. Nano Transceiver v1.0 for Bluetooth
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
输出lspci：
00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v2/3rd Gen Core processor PCI Express Root Port (rev 09)
00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04)
00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04)
00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04)
00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4)
00:1c.1 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 2 (rev c4)
00:1c.2 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 3 (rev c4)
00:1c.3 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 4 (rev c4)
00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04)
00:1f.0 ISA bridge: Intel Corporation HM77 Express Chipset LPC Controller (rev 04)
00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04)
00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04)
01:00.0 VGA compatible controller: NVIDIA Corporation GF114M [GeForce GTX 675M] (rev a1)
03:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. Device 5289 (rev 01)
03:00.2 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 0a)
04:00.0 Network controller: Intel Corporation Centrino Wireless-N 1030 [Rainbow Peak] (rev 34)
05:00.0 FireWire (IEEE 1394): JMicron Technology Corp. IEEE 1394 Host Controller (rev 30)
编辑3：在 Windows 中，网络摄像头运行正常。
答案1
请检查以下内容：
- 如果相机前任外部，请检查所插入的电缆和/或端口。
- 如果相机在外部，按下相机Fn+的硬件开关F7（或另一个功能键或有时是相机本身上的按钮或...）
- 在极少数情况下，在双启动系统上，摄像头可能已在 Windows 内部关闭，然后如果 BIOS 不允许，则需要再次在 Windows 中激活它。