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.
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