Lenovo L490 上的 Ubuntu 18.04 中的相机显示黑色

Question

我的相机工作正常。\n我的 18.04 使用了 2 年。\n我最近更换了笔记本电脑，IT 部门将我的 SSD 移至更新的笔记本电脑。我从联想L480换成L490

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最初相机工作正常，但 10 天后它只显示黑色\n相机由 linux 识别，如下所示：

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   \xc2\xa0localuser\xc2\xa0>\xc2\xa0lsusb\nBus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub\nBus 001 Device 004: ID 5986:2113 Acer, Inc \nBus 001 Device 006: ID 8087:0025 Intel Corp. \nBus 001 Device 002: ID 046d:c52b Logitech, Inc. Unifying Receiver\nBus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub\n\n\xc2\xa0localuser >\xc2\xa0dmesg | grep uvc\n[    3.610934] uvcvideo: Found UVC 1.00 device Integrated Camera (5986:2113)\n[    3.632137] usbcore: registered new interface driver uvcvideo\n\n\xc2\xa0localuser >\xc2\xa0ls -ltrh /dev/video*\ncrw-rw----+ 1 root video 81, 1 Dec  2 16:40 /dev/video1\ncrw-rw----+ 1 root video 81, 0 Dec  2 16:40 /dev/video0\n\xc2\xa0localuser\xc2\xa0>\xc2\xa0lspci\n00:00.0 Host bridge: Intel Corporation Device 3e34 (rev 0c)\n00:02.0 VGA compatible controller: Intel Corporation Device 3ea0 (rev 02)\n00:04.0 Signal processing controller: Intel Corporation Xeon E3-1200 v5/E3-1500 v5/6th Gen Core Processor Thermal Subsystem (rev 0c)\n00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th Gen Core Processor Gaussian Mixture Model\n00:12.0 Signal processing controller: Intel Corporation Device 9df9 (rev 30)\n00:14.0 USB controller: Intel Corporation Device 9ded (rev 30)\n00:14.2 RAM memory: Intel Corporation Device 9def (rev 30)\n00:15.0 Serial bus controller [0c80]: Intel Corporation Device 9de8 (rev 30)\n00:15.2 Serial bus controller [0c80]: Intel Corporation Device 9dea (rev 30)\n00:16.0 Communication controller: Intel Corporation Device 9de0 (rev 30)\n00:1d.0 PCI bridge: Intel Corporation Device 9db0 (rev f0)\n00:1d.3 PCI bridge: Intel Corporation Device 9db3 (rev f0)\n00:1d.7 PCI bridge: Intel Corporation Device 9db7 (rev f0)\n00:1f.0 ISA bridge: Intel Corporation Device 9d84 (rev 30)\n00:1f.3 Audio device: Intel Corporation Device 9dc8 (rev 30)\n00:1f.4 SMBus: Intel Corporation Device 9da3 (rev 30)\n00:1f.5 Serial bus controller [0c80]: Intel Corporation Device 9da4 (rev 30)\n00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (6) I219-V (rev 30)\n04:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981\n05:00.0 Network controller: Intel Corporation Wireless-AC 9260 (rev 29)\n07:00.0 Unassigned class [ff00]: Realtek Semiconductor Co., Ltd. RTS522A PCI Express Card Reader (rev 01)\n

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你能帮我解决这个问题吗？\n我可以看到相机已被识别，但奶酪上显示为空白

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编辑1：

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根据 waltinator 的建议，我检查了我的用户组，我的组中确实有视频，所以，这不是它，但这是消除可能原因的好方法

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\xc2\xa0localuser > id\nuid=1000(localuser) gid=1000(localuser) groups=1000(localuser),4(adm),24(cdrom),27(sudo),30(dip),44(video),46(plugdev),116(lpadmin),126(sambashare),999(docker)\n

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Answer 1

所以问题是这台笔记本电脑中有一个物理开关可以关闭相机镜头。
相机已开启：

相机已关闭：