USB Errors in dmesg, Solved
For many years, I've been annoyed at how my Linux computer (a Lenovo Carbon X1, gen 7) fills dmesg with errors every few seconds like:
usb usb3: root hub lost power or was reset(sometimes it was usb4 rather than usb3, or different but obviously related messages).
It makes it hard to see real messages in dmesg. I thought (NOTE: this was a stupid assumption) that since it said "root hub", that meant it was some kind of bad hardware design in the hub that's built in to the laptop, so I just put up with it.
Recently I complained about it on #linux and someone challenged me to actually
try unplugging things to figure out what was actually causing it.
[ 09:52 Mar 17, 2026 More linux/kernel | permalink to this entry | ]
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