[Bug 291962] plasmashell crashes possibly due to powerdevil conflict with newer kernels

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291962

            Bug ID: 291962
           Summary: plasmashell crashes possibly due to powerdevil
                    conflict with newer kernels
           Product: Base System
           Version: 15.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: storm16@gmail.com

Please note that there is an ongoing discussion on the forums,
https://forums.freebsd.org/threads/plasmashell-crashes.100771/#post-734321https://forums.freebsd.org/threads/plasmashell-crashes.100771.

I am not a developer, let alone a kernel dev, so I am grasping at straws here.
Basically, as the thread says, everything works perfectly on my desktop with an
nvidia gpu, however, on my Lenovo laptop, where I am running Intel graphics,
KDE will lock up, when the screen blanks or at least when the laptop is not in
use, no focus on any window, and only restarting sddm or slim will reset
everything. Note that things worked fine in 14.2R, but when I upgraded to 14.3,
the problem began to occur, and it has persisted across upgrades to 15.0R and
15.0p1...

One responder said that he read that its the handshake between the FreeBSD 14.3
and 15.0 kernel and KDE power saving that gets hung. I'm hoping the kernel devs
might be able to take a look at this and/or transfer it over to the Plasma
devs/porters.

The thread above covers all of the things we have tried.

Thanks!

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