Yeah, my sleep schedule is pretty bad since the holiday.... Oh, Oooooh.
this post was submitted on 02 Jan 2024
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I was up until 2am last night because the air felt "wrong"
This talk introduces sleepgraph, a tool that might help you debug your s2ram issues.
The talk may also convince you that, for your specific hardware, s2idle might be better than s2ram:
running sleepgraph crashes the computer same way deep sleep does 😖
For everyone I think
You still had deep sleep until now? Lucky you. To me Dell forbided S3 way earlier.
So... Bios update broke deep sleep, because fuck you, that's why?
Is deep sleep the same thing as hibernation? Hibernation is broken for me even on new EndeavourOS install on two different laptops.
No, hibernation saves state to disk, and turns the computer off, drawing no power. Deep sleep is what was for me just sleep until recently: it uses power to keep data in ram, so it's faster to wake up than hibernation. The amount of power used is really small, so unless you don't use your lap top for a couple of days, it won't deplete the battery. New hardware has this new "S2 Idle" state, that is basically an "On" state minus the screen and it's OS's job to try to use as little power as possible usually by telling each and every device to chill as much as possible (this is my understanding, but don't quote me on this). On Windows, with the first party device drivers, this sorta works OK + OS drops to deep sleep or hibernation depending on battery or something.
specs?
It's 2021 Lenovo ThinkBoot 15 G2 Intl with Intel i3-1115G4, 8GB onboard ram, integrated GPU and two NVME slots.
Here are some lines from dmidecode if they mean anything to anyone:
Getting SMBIOS data from sysfs.
SMBIOS 3.3.0 present.
Handle 0x0000, DMI type 0, 26 bytes
BIOS Information
Vendor: LENOVO
Version: F8CN42WW(V2.05)
Release Date: 06/28/2021
Address: 0xE0000
Runtime Size: 128 kB
ROM Size: 16 MB
Characteristics:
PCI is supported
BIOS is upgradeable
BIOS shadowing is allowed
ACPI is supported
USB legacy is supported
BIOS boot specification is supported
Targeted content distribution is supported
UEFI is supported
BIOS Revision: 2.42
Firmware Revision: 2.42
Handle 0x0001, DMI type 1, 27 bytes
System Information
Manufacturer: LENOVO
Product Name: 20VE
Version: ThinkBook 15 G2 ITL
SKU Number: LENOVO_MT_20VE_BU_idea_FM_ThinkBook 15 G2 ITL
Family: ThinkBook 15 G2 ITL
Handle 0x0002, DMI type 2, 15 bytes
Base Board Information
Manufacturer: LENOVO
Product Name: LNVNB161216
Version: SDK0J40700 WIN
so cat /sys/power/mem_sleep or whatever outputs with the brackets on deep?
Yeah, if the bracket is on deep, it crashes and enter the BIOS recovery thingy. If it's s2idle, it does what it says on the tin.
have you updated EFI/BIOS recently? maybe S3 sleep is not supported on your system anymore and instead you get suspend-to-idle as S0ix (Modern Standby) notoriously shitty under linux. sometimes you can flip it back in EFI/BIOS
I have a Windows dual boot, and Windows did install some updates, and Lenovo site indicates that the latest BIOS version was released mid November, so that could be it.