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_sleep only returns [s2idle], no deep sleep is supported. echo deep | sudo tee /sys/power/mem_sleep doesn’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 :/

  • sun_is_ra@sh.itjust.worksEnglish
    19·
    2 years ago

    My new Asus laptop didnt support S3 sleep.

    Turns out it does indeed support it but the BIOS claims it isnt.

    I found a patch for Linux ACPI that would make it enable S3 anyway and lived happily ever after

  • yum13241@lemm.ee
    5·
    2 years ago

    Why did they have to remove S3 sleep anyway? At least it worked. What was wrong with S3 sleep? Hardware support? At least it didn’t set your backpack on fire. LTT made a video about your very problem. I would honestly just use shutdown.

    #BringBackS3Sleep

    Mine supports s2idle [deep], and it’s 6 years old.

    On Windows, make sure to unplug the charger before closing the lid, otherwise it’ll try to run Windows updates because it thinks it on AC power.

  • dingdongitsabear@lemmy.ml
    51·
    2 years ago

    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.

    • owatnext@lemmy.world
      2·
      2 years ago

      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.

        • owatnext@lemmy.worldEnglish
          1·
          2 years ago

          I just checked my settings, seems that when I close the lid, it is set to sleep. Running cat /sys/power/mem_sleep returns s2idle [deep], whatever that means. I just leave it at the default settings. Perhaps I am just lucky?

  • BrianTheeBiscuiteer@lemmy.world
    2·
    2 years ago

    I have a newish Dell XPS and I got to where I just hibernate all the time (automatic when I close the lid) because otherwise it would easily die in less than a day.

  • Toyful@lemmy.world
    415·
    2 years ago

    is there some secret to getting more power saving sleep on modern machines?

    The smartass answer is simply just “turn it off”

    With SSDs, boot times are negligible now and I don’t see any need to sleep/suspend