S3 sleep / suspend to ram on Ubuntu 18.04
(01-17-2020, 03:18 AM)wasgurd Wrote:
(01-16-2020, 05:17 PM)tophneal Wrote: Which kernel does bullseye run, using that installer?

uname -a
Linux pinebookpro 5.4.2-2-pinebookpro-arm64 #1 SMP PREEMPT Sat Jan 11 03:28:31 UTC 2020 aarch64 GNU/Linux

Anything running Debian Bullseye is, assuming you used my installer and didn't change it afterwards, configured to do something called suspend-to-idle.

It means that when the laptop is asked to suspend to memory the kernel will prevent any tasks from being scheduled and close down most of the device drivers. Then it just waits... in other words is relies on normal kernel power management (cpufreq, cpuidle, etc) to minimise standby power. In principle by eliminating wakeups then we ensure that cpuidle can descend to it's deepest sleep state.

There are some power savings in this state (for example all the radios will get turned off) but they are pretty modest. I compared an s2idle system against a system doing nothing with the backlight turned off... s2idle ended up saving about a watt. So, not completely useless, but if I am going away for more than an hour I generally do a real power off instead.

It is configured this way because I wasn't able to get the system to turn back on after going into a deeper suspend state. There are some power savings but more importantly the laptop shouldn't hang when you close the lid: most desktop environments are configured to automatically suspend on lid-close and adopting s2idle means we don't have to hack each one separately to avoid the suspend.
PineTime: wasp-os and MicroPython, Pinebook Pro:  Debian Bullseye

Messages In This Thread
RE: S3 sleep / suspend to ram on Ubuntu 18.04 - by danielt - 01-17-2020, 11:53 AM

Possibly Related Threads…
Thread Author Replies Views Last Post
  Sleep and external display - Are there any options? chris88233 7 859 09-04-2023, 09:03 PM
Last Post: wdt
  PineBook Pro seems to go to deep sleep, but doesn't wake up pogo 11 3,735 08-31-2023, 04:20 PM
Last Post: TRS-80
  Suspend/Resume Broken with Bootloader on SPI Flash xp19375 2 890 03-24-2023, 04:25 PM
Last Post: srs5694
  Resume from suspend not working after flashing Tow-Boot to SPI xp19375 3 1,564 10-31-2022, 10:14 AM
Last Post: wdt
  How to make manjaro sleep or hibernate? KDE? regretfulpineuser 0 823 06-20-2022, 12:56 AM
Last Post: regretfulpineuser
  Working suspend on Manjaro brzegorz 3 4,698 12-03-2021, 01:39 PM
Last Post: rik-shaw
  reset sound after suspend to memory (deep sleep) Der Geist der Maschine 16 15,278 10-18-2021, 07:31 PM
Last Post: Syonyk
Question Help: Pinebook Pro will not enter sleep [Manjaro 20.04] EverythingIsInput 49 60,406 05-07-2021, 06:21 AM
Last Post: line72
  After update in Ubuntu bionic mate system crashed Wawe 2 2,924 04-18-2021, 04:52 AM
Last Post: Wawe
  Anyone can get deep sleep fully works with NVME rootfs? plumlis 0 1,907 01-11-2021, 09:58 AM
Last Post: plumlis

Forum Jump:

Users browsing this thread: 1 Guest(s)