Re: Suspend-to-Disk vs Suspend-to-RAM
On 12/6/19 10:49 PM, James Cassell wrote:
I performed a suspend-to-ram, and during the 6 or so hours since
then,
the system dropped from 51% charge to 11% charge... it seems like
something is not being put in its lowest possible power state. With
hibernate, the system does not drain the battery while not in active use.
Check /sys/power/mem_sleep to see which suspend mode is being used. I
suspect it will be s2idle, which resumes more quickly but costs more
power during suspend. I have read that the default value is taken from
firmware settings, and reflects the preference of the OEM, but I'm not
sure how you'd verify that. In any case, on my Dell laptop, I set
"mem_sleep_default=deep" as a boot parameter for better battery life
during suspend.