On Wed, 2021-11-24 at 22:12 +0100, Patrick Dupre wrote: > v4l2-ctl --list-devices > Cannot open device /dev/video0, exiting. > > It looks like that I cannot turn the camera on (it is an internal > camera). > fn+f6 does not do any thing. > The worst is that this camera has been workig in the past! Hardware does fail. And that can be a major pain when it's built-in. If it weren't built in, one other guess might be that the computer doesn't have sufficient power on its USB buses to run the camera. Though that's still a possibility, even with built-in cameras, they're often an internal USB device. The computer shares its USB power availability across a number of USB ports, often in groups (e.g. one set of sockets shares a 1 amp maximum, a second pair has their own 1 amp maximum), and there is a finite maximum it can power. You could try unplugging any extra USB accessories to see if it makes any difference. If I try plugging two webcams into my system USB things start to fail in a very short time (a camera will go offline, the keyboard will fail, a mouse will go erratic). To recover, I'd have to unplug all USB devices, wait a moment, then reconnect just keyboard and mouse. They're not identical models, so it shouldn't be a peculiar mistaking of devices confusing it. -- uname -rsvp Linux 3.10.0-1160.45.1.el7.x86_64 #1 SMP Wed Oct 13 17:20:51 UTC 2021 x86_64 Boilerplate: All unexpected mail to my mailbox is automatically deleted. I will only get to see the messages that are posted to the mailing list. _______________________________________________ users mailing list -- users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to users-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/users@xxxxxxxxxxxxxxxxxxxxxxx Do not reply to spam on the list, report it: https://pagure.io/fedora-infrastructure
