1
Kernel 7.1.rc3-1 doesn’t shutdown completely.
Screen goes black, but USB devices (like midi keyboard, or soundcard are still powered on).
After about 5 seconds fans start spinning again, seems like a kernel panic.
Have to press the power button for about 10 seconds to complete power off system.
The issue occured in 7.1.rc2 but still persists.
CPU: AMD Ryzen 9 7940HS
GPU: AMD Radeon 780M Graphics
eTux 2
Out of curiosity, are you using a RC (release candidate) kernel for the purpose of developing, testing or bug reports?
If the answer to the above is no, are you using it on your production system? If yes, are you sure you want to use a kernel which is similar to a “beta” release of a software on your production system?
RC kernels are higher risk (regressions, unfinished work) and are not recommended for production; stable kernels are lower risk and are maintained by stable maintainers who backport fixes.
Are we to consider your post as a bug/regression report? Because if you are seeking assistance to fix issues with a RC release, I am not sure you how big your chances are to get assistance here. I may be wrong though.
axra 3
I always have a minimum of 2-4 Kernels installed. And the RC is one of it.
Sure for testing and if it works I use it. Cachy offers the possibility to install it. So I try.
And this is the first major issue I have with it for a very long time.
I don’t think it’s beta. It’s a release canditate which comes after beta.
And even the “standard” kernels updates contain new bugs, bug fixes, regressions, revert of commits etc. (So one could consider them as release candidate, or beta too. 
)
And sometimes I had issues with standard Kernels and the RC solved it.
I don’t hope for a fix here, but maybe for a confirmation that other RC users experience the same issue.
If this bug is not solved until final release, there wil be a lot bug reports about this issue I’m pretty sure.
axra 4
Meanwhile I found out, that shutdown only works, if the laptop is running on battery mode.
If it’s AC connected, it fails.
Another issue I discovered in 7.1.rc3 is that I cannot set cpu governor to performance mode.
Only powersave and balanced are working. (message in KDE: modus performance cannot be activated)
So there seems to be an issue with cpupower scaling/governor and AC mode. And maybe these 2 issues are connected…(maybe only present on AMD Hardware)
axra 5
ADDITION: If I logout from the session first (XFCE or KDE) and shutdown afterwards than it’s working on AC too.
So the temporary fix for me is to logout from the session first before shutdown.
I normally don’t use performance mode.
Zinkk 6
The power setting issue is a very recent 7.1-rc kernel bug due to changes from amd pstate power controls. I had similar problems with limited cpu speed and can no longer use performance mode either (on the rc kernel). I am on a desktop computer so it isn’t just laptop users, i suspect this bug is much more widespread than anyone has realized yet. I’d guess most people with amd cpu using the cachy-rc kernel who have run updates in the last week or so are effected by this.
That’s happens to me every once in awhile even older kernels. You can hit esc and see what it’s haging on. For me it’s something ran by me but never figured out what it is.
axra 8
Thank you very much for the links. 
axra 9
I’m nearly 100% sure that the shutdown issue is related to the amd_pstate bug.
I never had this issue before (depending on battery, or AC mode).
And it don’t happens once in a while. It happens all the time.
Other kernels work. Only RC fails.
Are you on AMD Hardware ?
axra 10
The issues still persist in 7.1.rc4-1.
axra 11
Still persists in 7.1.rc5. 
Tested in Linux-Mainline.