Laptop, removed cable power supply, immediately all USB ports will be switched off

[tkn]

If all else fails, follow the links below:

USB working only once in a while

It could be that your system is powering down your USB ports to save energy. It might do that in a rather rude and inconvenient way because of BIOS bugs. The quick hack/check: To check if the USB ports are powersaved, paste this in a terminal: cat /sys/bus/usb/devices/*/power/control 'on' means "on" 'auto' means "can be powersaved" To set all USB powered devices permanently on, paste this in a terminal: for line in /sys/bus/usb/devices/*/power/control do echo 'on' | sudo tee "$l…

Testdriving daily build 24.04 (Noble Numbat)

I can only guess here, ofcourse, but it seems that the powersave options may be a bit too agressive for your computer. There is a chance that your USB ports are getting "powersaved". If this is what happens to your USB ports, you might want to check out this post: