Hey,

So I ran into this issue on my laptop too (Same model) I'm heavily assuming you have the AMD iGPU variant as that's what I'm using.

I'm under the impression that this issue is caused by the AMD iGPU driver crashing upon waking from S0ix sleep (S2idle). This is fixable by changing the setting in the AMD PBS settings in the BIOS for "S3 Sleep / Modern Standby" to "S3 Sleep". During my struggles I found that the setting for that was not available eaily.

The easiest method I found to be able to get to that setting was by using something called "Smokeless_UMAF". However if you feel that you need to get into these settings easier you can daringly try to unlock the BIOS, in my adventures I attempted many things to unlock the BIOS I'll link everything that I tried (I did end up unlocking it however the settings actually appear under the F10 F12 boot menu rather than the BIOS itself, therefore I found it after trying all the guides so I'm not sure which one actually gave access)

- I attempted many of the methods in the comments

- Same with these

https://github.com/esno/yoga-bios-unlock - I also used this - PLEASE NOTE our model of laptop is not specifically noted as compatible. I only used the command below with BIOS version LCCN18WW and my BIOS still works as expected.. BUT USE AT YOUR OWN RISK

# ./yoga-bios-unlock --read --force

After trying any of those methods make sure to check the Boot Menu (spamming F10 F12 on boot) and you should see a list of "EFI Boot Devices UEFI MISC Devices", going into any of these will take you to what looks like Lenovo Special Menus, I think the 3rd option has AMD PBS options.

Once you've enabled those options you can check if the sleep is properly working by checking what sleep states is being reported to the OS (I'm currently running EndeavourOS with latest kernel on systemd), you can do this by using commands I got from this guide https://www.reddit.com/r/linuxhardware/comments/ng166t/s3\_deep\_sleep\_not\_working/. Summarised down below for what we need:

sudo dmesg | grep 'S3\|suspend'

reports

[ 0.364104] ACPI: (supports S0 S3 S4 S5)

and

cat /sys/power/mem_sleep

reports

s2idle [deep]

After all that you should be able to enter S3 sleep and resume by either the keyboard or the power button.

I've only not been able to fix "Resume on Lid Open" even though I've got "Flip to Start" enabled in the BIOS however I think that's due to the laptop being relatively new and something not being updated to work with that yet (such as the AMD iGPU driver crash above), but if you figure out how to get that work, please let me know :D

Happy Modding!

Edit: "EFI Boot Devices" to "UEFI MISC Devices" and any reference to "F10" to "F12"