Kernel 6.18 doesn't boot on Ryzen 9 hx 370

Issues & Assistance
1

After updating to the kernel 6.18 (linux-cachyos and linux-cachyos-bore) my Dell Pro 14 (AMD Ryzen 9 HX 370) stopped fulling booting, while with the 6.16 and 6.17 everything is fine.
I read something about the zen 5 architecture rdseed probems, but i don’t know if there is a fix or something. Also i’m using the amdgpu.dpm=0 in grub cmdline to enable the suspend.

I’m using the cachy-znver4 repos (cachy default when i installed the distro)

(I’m now using the 6.16 linux-cachyos-lto)

Any help is appreciated.

edit: i thinkered some more, turns out removing the amggpu.dpm=0 solves the problem

2

Also masking RDSEED prevents boot hangs on Zen 5.

Edit /etc/default/grub

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash clearcpuid=rdseed"

sudo grub-mkconfig -o /boot/grub/grub.cfg

If it boots try re-adding amdgpu.dpm=0

3

After this update ‘amdgpu.dpm=0’ seems to be not necessary anymore, i’ve tried the suspend without It and everything works fine (at least on my machine)