Comment # 11 on bug 1217344 from Takashi Iwai

(In reply to Rigo Wenning from comment #9)
> I have also kernel failure with the latest tumbleweed kernel. When
> installing it runs dracut for every single core. The system boots. But when
> I want to log into KDE, it hangs forever. Console reports a failure to start
> powerdevil (for whatever reason). So already the kernel install procedure
> seems fishy.
> 
> Again, Kernel 6.5.9 just works fine, boots, KDE runs fine.
> 
> I have a Dell latitude 7490. 
> 
> So even if it starts, I think kernel 6.6 has trouble interacting with KDE.
> There seems to be something fundamentally wrong.
> 
> BTW, when installed for the first time, the system started and ran fine,
> even after reboot. I haven't done any install since then. Now I have updated
> to the latest tumbleweed 2023-12-02. That runs fine with kernel 6.5.9 but
> does not work with Kernel 6.6.
> 
> I think this is a critical bug

If it boots ever, yours can be likely a different issue.

There have been already a few different boot problems with 6.6.x.  Make sure
that your machine still has the boot problem with the latest kernel in OBS
Kernel:stable repo, too.  And if yes, check whether it shows the very same
symptom (no relevant messages even if you boot with nomodeset boot option).