When I use my laptop on battery, no USB device I connect (i.e. memory stick, external hard drive or mouse) is recognized on either USB 2.0 or USB 3.0 ports.
I found two workarounds, which I, however, don't find satisfactory long term:
- Plug in the device. Go into suspend. Wake up.
- Connect the laptop to power. Plug in the device.
I tried to mess around with the BIOS settings, which has two options regarding USB: "Legacy USB Support" and "USB Mass Storage Driver Support". I have tried any combination of "disable" and "enable", but nothing helped.
Someone running Arch seems to have a similar problem, so could this have to do with the kernel?
Laptop: Asus Zenbook UX305UA
OS: elementary OS 0.4 Loki (based on Ubuntu 16.04 LTS)
I have tlp installed .
EDIT: Same problem with the SD card slot.