Some settings can not be set back from "Good" to "Bad"

Hi,

it is possible to toggle some settings like "Enable Audio codec power management" from "Bad" to "Good" and back again. However, when exiting powertop while it is set to "Good", and then re-running powertop, the value is stuck at "Good", i.e. it is not possible to toggle it to "Bad". When trying to do so, the status line only shows ">> (null)" instead of something like "echo '' > '/sys/module/snd_hda_intel/parameters/power_save';".

This is probably because sysfs_tunable::bad_value is initialized with "\0" and does not change its value if it is already set to "Good" when starting up powertop. When now calling sysfs_tunable::toggle(void), strlen(bad_value) is 0 and the write_sysfs line is not executed.

Is it possible to fix this?

Regards,
Martin Walch

Hi Martin,

It is possible-- it's just a matter of time and scarcity thereof (in my case, anyway). If you'd like to file a bug report (doesn't have to be elaborate), we could see how the community may be able to help:

https://app.devzing.com/powertopbugs/bugzilla

Cheers, hth