I was running KDE Neon on ThinkBook 15 G2 and had deep sleep working after adding mem_sleep_default=deep to GRUB_CMDLINE. It worked for a while until it didn’t. I didn’t do anything other than running regulat updates. Since couple weeks back, when going to sleep, it shows BIOS Recovery progress bar or something and restarts.

I switched to Debian and the behavior is the same. S2 sleep is next to useless as it drains something like 10% battery / hour, and the lap top is warm to touch.

    • TushtaOPEnglish
      1·
      11 months ago

      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
        • TushtaOP
          1·
          11 months ago

          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.