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.

  • Tushta@programming.devOP
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    10 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
    
      • Tushta@programming.devOP
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        10 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.