Problem solved.  Although the power light (physical LED on laptop) was 
illuminated, replacing the mains adapter solved the problem.  Evidently 
not a software issue but a problem with the output (power?  voltage?) of 
the mains adapter sufficient for the LED to illuminate but not in fact 
sufficient to power the laptop.  Apologies for the extra traffic.

Yasha Karant

On 09/29/2016 08:45 AM, Yasha Karant wrote:
> I just updated to the current SL7 security via yumex on both a 
> workstation (mains only) and a laptop (internal battery, mains adapter)
>
> Kernel 3.10.0-327.36.1.el7.x86_64 -- all yumex update recommended RPMs 
> were installed.
>
> HP Zbook
>
> Both MATE PowerManager 1.14.0 and GKrellM 2.3.5 report no mains 
> adapter and 83 percent remaining in the battery for 10 hours 30 
> minutes -- this started after the above update.  The amount of battery 
> time is very far off -- it really should be about 2 hours.
>
> Has anyone else experienced this?  Is there a fix/workaround?
>
> Yasha Karant