Tim: > > I wonder if those are devices that just expect to get lots of power > > from the USB port without asking for it
Dr. Tibor Attila Anca: > I indeed have an external HDD on my USB hub, but that device has an own > power supply. The USB-Mouse should not ask for that much power, right? > Anyway, I did now a clean install of F41, no issues till now with losing > USB. True, a mouse shouldn't use much power (well, not unless it's one of those gaming mice with a built-in overdone lighting effects). But the default very low power that a USB port is supposed to supply until more is negotiated, is too low for many devices, even simple ones. Though my comment is taking one of those wildly unusual approaches (since USB power negotiation is so often ignored that it often doesn't matter). However, the power consumption of USB devices is cumulative. You'll find that a set of ports will have a maximum power supply capability spread between all of them. So a plethora of plugged in things does tax a system badly. I have two webcams that if both are plugged into the same group of ports does make my PC go haywire. It was a little experiment in streaming. They do identify themselves differently from each other, so I discount it being that kind of clash. They do consume a fair bit of power. I've even found lots of low powered USB things plugged into a PC to cause issues. By the time you've got mouse, keyboard, webcam, harddrive, sound card, etc, plugged in, you may encounter a design weakness in a motherboard that makes things unstable. I can certainly upset my computer by plugging in two illuminated keyboards, that's otherwise fine with two plain keyboards at the same time. -- uname -rsvp Linux 3.10.0-1160.119.1.el7.x86_64 #1 SMP Tue Jun 4 14:43:51 UTC 2024 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@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org 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@lists.fedoraproject.org Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
