Which types of warnings does tlp-stat -w check for?
Currently the command checks the kernel log for disk device related errors possibly caused by the settings for ALPM.
What should I do if warnings are shown?
TLP’s former [until 1.0] default setting on battery SATA_LINKPWR_ON_BAT=min_power is optimimized for maximum power saving. Try less aggressive values: with kernel ≥ 4.15 use
for kernel < 4.15 use
or disable the setting completely – see SATA_LINKPWR_ON_AC/BAT.
Don’t forget to reboot before checking again.
The same applies to SATA_LINKPWR_ON_AC
The difference in power consumption between min_power and max_performance may amount to more than 1 W depending on your hardware
What to do if the warnings do not disappear after changing the settings?
In case there are only 1 or 2 warnings immediately after system boot or a change of power source: users reported it is safe to just ignore them
In case of a high warning count: try to use a newer kernel version
Disable SATA_LINKPWR_ON_AC/BAT completely
What is the cause for these errors?
Poor implementation of ALPM in the disk’s firmware or SATA controller or System BIOS
Issues between the controller and the disk
Kernel driver issues