Most very recent laptops no longer support S3 sleep which used to be the default for a long time. On my old laptop it allowed me to just close the lid in the evening and open it again in the morning, and it would only loose a negligible amount of charge during that time.
My new laptop (Dell Inspiron 14 Plus, Alder Lake) uses s2idle by default on Linux (Fedora in my case), which depletes the battery very quickly. I tend to shut down my computer every evening now, but even when I just put my laptop in my bag for 2 hours it will have lost 10-15% when I get it out. It's not terrible and I have gotten used to using my laptop like that but there's got to be a better way right?
I know hibernation / suspend-to-disk is an option in theory, but I use secure boot (and also disk encryption), and that makes it a lot more complicated, involving compiling your own patched kernel, so no thanks.
The way sleep on modern laptops is supposed to work is apparently called S0iX but it is not used by default and I don't know if or how I could make use of it on my laptop, and a guide that is linked everywhere on 01.org now just redirects to some generic intel site.
If you have a recent laptop without S3 sleep support, how are you dealing with this? Do you just live with the poor battery life, or is there some secret to getting more power saving sleep on modern machines?
Edit for mare clarification:
- The laptop does enter s2idle correctly, it just doesn't get down to a very low power state at all and consumes ~5% an hour
cat /sys/power/mem_sleeponly returns[s2idle], no deep sleep is supported.echo deep | sudo tee /sys/power/mem_sleepdoesn't work (tee: /sys/power/mem_sleep: Invalid argument)- There's no option in the BIOS to enable other sleep modes
- I've even tried patching the ACPI table myself to enable S3 sleep and it didn't work. I have no idea if I did it correctly although according to dmesg it did seem to load my patch
Thank you all for your input but it looks like on this Dell laptop I'm stuck with horrible s2idle sleep :/
my laptop is comparatively old (t480s, 8th gen) but had the same issues with battery drain on F38. I've switched to debian ~~and the situation is way better~~, overnight drain percentage-wise is in the single digits range. still nowhere close to my old macbook, but workable.
edit: no it isn't, tested F38 and D12 on separate partitions, both lose same amount; ~1 %/hr of standby (regardless of deep or s2idle setting), so 7-8% overnight.
edit 2: looking into making suspend-then-hibernate work, that should fix everything; sleep for 30 mins and hibernate afterwards.
@dingdongitsabear
@Sh1nyM3t4l4ss
I believe Macbooks have higher battery capacity. Don't they?
not important for this use case. I'm referring to the fact that I can close it shut and leave it for a week. I open it and it's ready to go and the battery has barely lost a percentage point. that's 2010 tech and something completely unattainable to me 13 years later. I've moved on from macOS but can't help being envious.
They are on the higher-end of capacity but (especially Apple silicon) are much more power-efficient.
T480s here as well, running Void Linux. I just close the lid and whatever it does barely uses any battery. Something like 2-4% every 24 hours.
I can't come close to that number, 7-8% overnight. do you have suspend to disk enabled?
I just checked my settings, seems that when I close the lid, it is set to sleep. Running
cat /sys/power/mem_sleepreturnss2idle [deep], whatever that means. I just leave it at the default settings. Perhaps I am just lucky?