4 ms·
What? This is disastrous! How do I check (from Linux) if the laptop can go into suspend to memory or not?
by Timja 4y ago
What? This is disastrous!
How do I check (from Linux) if the laptop can go into suspend to memory or not?
- namibj 4y agoMight mention ACPI state options in dmesg early on during boot, or you could probably poke at some ACPI diagnostics/options to see the capabilities. I think `cat /sys/power/mem_sleep` should tell you the desired modes; the active mode is selected and iirc changing one is done by writing the name of an option into the file. There are some related files next to `mem_sleep` in `/sys/power/`.
- haspok 4y agoIf you are very lucky, you have an option in the BIOS to enable S3 sleep state. If you are moderately lucky, you may not have this _yet_, but you get it with a BIOS update. But even if you have it, Linux might be hit and miss - sometimes it works, sometimes not, usually crippling some device like the touchpad after a wake-up. You can try `cat /sys/power/mem_sleep` to see what states you have available. "deep" is what you want. "s2idle" and "shallow" are the ones that are just "low-power". EDIT: actually, after a bit of web browsing it turns out that Intel 11th gen and above do not have S3 support anymore. So don't wait for BIOS support, it won't happen...
- Timja 4y agoYeah, only s2 here. Would switching to an AMD laptop fix it? Strange, that KDE still writes "Suspend to RAM" under the "Sleept" button when it cannot do that.