Thank you both for your suggestions,

On Tuesday, 25 June 2019 09:47:16 BST Neil Bothwick wrote:
> On Tue, 25 Jun 2019 00:12:56 +0100, Mick wrote:
> > > > Can someone please explain how the removal of the 'wireless' USE
> > > > flag from powerdevil ends up with no buttons for Suspend-to-RAM,
> > > > Hibernation, Reboot or Shutdown under the Leave tab of the KMenu?
> > > > What does wireless have to do with those functions which should work
> > > > regardless?
> > > 
> > > Those options are still present here.
> > 
> > Thanks Neil, these are the packages which were depcleaned following
> > USE="- wireless" for powerdevil, USE="-espeak" for speech-dispatcher
> 
> > and USE="device- mapper-only -thin" for lvm:
> Has nobody ever told you about changing only one thing at a time? ;_)
> 
> > 1561390348: Started emerge on: Jun 24, 2019 16:32:28
> > 1561390348:  *** emerge --ask --verbose --depclean
> > 1561390348:  >>> depclean
> > 1561390428: === Unmerging... (virtual/w3m-0)
> > 1561390432:  >>> unmerge success: virtual/w3m-0
> > 1561390432: === Unmerging... (virtual/linux-sources-3)
> > 1561390436:  >>> unmerge success: virtual/linux-sources-3
> > 1561390436: === Unmerging... (kde-frameworks/networkmanager-qt-5.57.0)
> > 1561390440:  >>> unmerge success:
> > kde-frameworks/networkmanager-qt-5.57.0 1561390440: === Unmerging...
> > (sys-block/thin-provisioning-tools-0.7.0) 1561390445:  >>> unmerge
> > success: sys-block/thin-provisioning-tools-0.7.0 1561390445: ===
> > Unmerging... (app-accessibility/espeak-1.48.04-r1) 1561390449:  >>>
> > unmerge success: app-accessibility/espeak-1.48.04-r1 1561390449: ===
> > Unmerging... (www-client/w3m-0.5.3_p20180125) 1561390453:  >>> unmerge
> > success: www-client/w3m-0.5.3_p20180125 1561390453: === Unmerging...
> > (media-sound/sox-14.4.2-r1) 1561390458:  >>> unmerge success:
> > media-sound/sox-14.4.2-r1 1561390458: === Unmerging...
> > (net-misc/networkmanager-1.16.0) 1561390464:  >>> unmerge success:
> > net-misc/networkmanager-1.16.0 1561390464: === Unmerging...
> > (net-dialup/ppp-2.4.7-r7) 1561390468:  >>> unmerge success:
> > net-dialup/ppp-2.4.7-r7 1561390468: === Unmerging...
> > (net-misc/dhcp-4.4.1) 1561390473:  >>> unmerge success:
> > net-misc/dhcp-4.4.1 1561390473: === Unmerging...
> > (dev-libs/boehm-gc-7.6.4) 1561390478:  >>> unmerge success:
> > dev-libs/boehm-gc-7.6.4 1561390478: === Unmerging...
> > (media-sound/gsm-1.0.13-r1) 1561390482:  >>> unmerge success:
> > media-sound/gsm-1.0.13-r1 1561390482: === Unmerging...
> > (net-libs/libndp-1.7) 1561390486:  >>> unmerge success:
> > net-libs/libndp-1.7 1561390486: === Unmerging...
> > (net-misc/modemmanager-1.8.2-r1) 1561390493:  >>> unmerge success:
> > net-misc/modemmanager-1.8.2-r1 1561390493: === Unmerging...
> > (dev-libs/newt-0.52.20) 1561390497:  >>> unmerge success:
> > dev-libs/newt-0.52.20 1561390497: === Unmerging...
> > (net-dialup/ppp-scripts-0) 1561390501:  >>> unmerge success:
> > net-dialup/ppp-scripts-0 1561390501: === Unmerging...
> > (sys-libs/slang-2.3.2) 1561390505:  >>> unmerge success:
> > sys-libs/slang-2.3.2 1561390505: === Unmerging...
> > (net-libs/libqmi-1.20.2) 1561390510:  >>> unmerge success:
> > net-libs/libqmi-1.20.2 1561390510: === Unmerging...
> > (net-libs/libmbim-1.16.2) 1561390515:  >>> unmerge success:
> > net-libs/libmbim-1.16.2 1561390515:  *** exiting successfully.
> > 1561390515:  *** terminating.
> > 1561390536: Started emerge on: Jun 24, 2019 16:35:36
> > 1561390536:  *** emerge --ask --verbose @preserved-rebuild
> > 1561390543:  *** exiting successfully.
> > 1561390543:  *** terminating.
> 
> I don't have most of those packages either, I do have w3m and sox but
> you'd have to be pretty desperate to start suspecting them.

I am!  O_O


> [ebuild   R    ] kde-plasma/powerdevil-5.16.1:5::gentoo
> USE="-brightness-control -debug handbook -wireless" 0 KiB
> 
> It doesn't look like USE affects it either.
> 
> > I can't see anything in there.  I also uninstalled and reinstalled
> > plasma- meta, but did not depclean anything.  Could there be something
> > in systemsettings?  Yep! Power Management is greyed out:
> > 
> > "Power management configuration module could not be loaded. The Power
> > Management Service appears not to be running.  This can be solved by
> > starting or scheduling it inside "Startup and Shutdown".
> > 
> > What am I supposed to add in "Startup and Shutdown"?  There is no Power
> > Management to start up and no button to add any services.  :-/
> 
> I can't see anything power related in there. I have everything but
> automounting enabled.
> 
> Have you tried logging in as a new user, to see if it's a configuration
> option that's wrong somewhere?

I've done one better, installed Enlightenment to try it out on this machine, 
in case it works without intermittently spinning up the CPU when the screen 
goes to sleep, but all the power settings were missing in Enlightenment too.

I run an update today which brought in a new dbus package.  Although 
@preserved-rebuild did not pick up anything, revdep-rebuild which Dale 
suggested and I had not run yet, wants to reinstall quite a few packages 
including ... libreoffice.  O_o

Anyway, I'll let it run its course, reboot and see what I get.

-- 
Regards,

Mick

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