On Wed, 11 Mar 2015 14:47:34 +0000
Stormin' Norman wrote:

Lastly, are you using the notebook primarily connected to A/C power
or on battery? When on battery power, most notebooks kick the CPU
into power saving mode, which involves dramatically reducing the
processing speed.

It looks like you solved the problem. After plugging into AC power and
using the computer, it is working the way it's supposed to.

I never noticed this before, but even with the battery fully charged,
the display becomes brighter when running from AC power.