我知道有人问过类似的问题，但我读过这些问题的答案，但没有一个能帮助我解决我的网络摄像头的问题。我从来没有怎么用过我的网络摄像头。即使在使用 Windows 的时候。在转到 Linux，特别是 Ubuntu 之后，我大部分时间都用胶带把它盖住。但最近世界上发生的事件让视频会议成为必需品，我想看看是否有办法修复我的联想 Y50-70 中的集成网络摄像头。到目前为止，我已经尝试了很多方法，并且已经放弃了一段时间。但昨天，我偶然打开了 Cheese，看到网络摄像头活动指示灯亮了。这是一个大惊喜。我撕下胶带，它就在那里......相机正在工作。我欣喜若狂。快进到今天，Cheese 或任何其他可以访问网络摄像头的应用程序都无法再检测到它了。我什么也没做。没有更新。没有新应用程序。笔记本电脑已经关机了，我觉得修复网络摄像头的任何东西都随着关机而消失了。
以下是一些详细信息。笔记本电脑是联想 Y50-70。运行后lspci返回以下内容：
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor DRAM Controller (rev 06)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06)
00:02.0 VGA compatible controller: Intel Corporation 4th Gen Core Processor Integrated Graphics Controller (rev 06)
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI (rev 05)
00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 (rev 04)
00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #1 (rev d5)
00:1c.1 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #2 (rev d5)
00:1c.2 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #3 (rev d5)
00:1c.4 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset Family PCI Express Root Port #5 (rev d5)
00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation HM87 Express LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] (rev 05)
00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller (rev 05)
01:00.0 3D controller: NVIDIA Corporation GM107M [GeForce GTX 860M] (rev a2)
08:00.0 Network controller: Broadcom Inc. and subsidiaries BCM4352 802.11ac Wireless Network Adapter (rev 03)
09:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 10)
0a:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS5249 PCI Express Card Reader (rev 01)
运行lsusb显示如下（我连接了外接鼠标和键盘）：
Bus 002 Device 002: ID 8087:8000 Intel Corp.
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 8087:8008 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 004: ID 0489:e07a Foxconn / Hon Hai BCM20702A0
Bus 003 Device 003: ID 258a:1006 Gaming KB Gaming KB
Bus 003 Device 002: ID 18f8:1686 [Maxxter] USB GAMING MOUSE
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
/dev/video*机器上也不存在。我早就放弃了这个网络摄像头。但昨天它还能用，这让我看到了希望。有人能解释一下这个问题吗？
非常感谢，谢谢。