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.
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 WINso 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.