This is a regression. Linux firmware 20220708 works perfectly. With the latest firmware from the git main branch, s2idle for several hours causes the laptop to shut down.
There is a revert for the broken VCN firmware. https://lore.kernel.org/linux-firmware/CADnq5_N5qZW3c_YUaAB2_9zp6kYHSfVR4KopexkFSi02W6nZbg@mail.gmail.com/T/#mf20ab0376abfe8d8aa1fe092564dcc5537e6e67d Can you revert that and confirm if it fixes things?
Yes, it seems to function properly.
Thanks. The revert is landed here: https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/commit/amdgpu?id=150864a4d73e8c448eb1e2c68e65f07635fe1a66