USB Devices

USB device does not work

Symptom: some USB devices do not work reliable when TLP activates USB autosuspend mode.

Solution: lookup the corresponding USB device ID with lsusb, add it to USB_BLACKLIST and reconnect the device.

Important

All input devices (driver usbhid) and [as of version 1.2] libsane-supported scanners get excluded by default. It’s therefore unnecessary to put them on the USB_BLACKLIST. To circumvent the default for certain devices enter the IDs into USB_WHITELIST.

Newly inserted USB devices not recognized in battery mode

Affected hardware: ThinkPad T495 AMD, T495s AMD (see Issue #436).

Workaround: blacklist the USB controllers with

RUNTIME_PM_BLACKLIST="06:00.3 06:00.4" # T495 AMD
RUNTIME_PM_BLACKLIST="05:00.3 05:00.4" # T495s AMD

Smartphone does not charge when connected

Solution: exclude the smartphone from autosuspend and reconnect the device.

Version 1.0 and higher: configure

USB_BLACKLIST_PHONE=1

Version 0.9 and lower: lookup the smartphone’s USB device ID with lsusb and add it to USB_BLACKLIST.