computer on AC, pull AC, screen freezes and computer on Battery, plug in AC, screen freezes

[Jim Wright]

Using Linux Mint 16, Mate on a HP laptop, model 2000-2d60dx.
If the computer is running with AC connected, unplugging AC will cause the screen to freeze.
If the computer is running on battery, plugging in AC will cause the screen to freeze.

Happens every time.

Additionally, under the 'On Battery Power' tab in Power Management, if you have either the 'Reduce backlight brightness' checked or the 'Dim display when idle' checked, the computer will not boot up unless you have the AC connected.

Happens every time.

[Robert Townley (robertjtownley)]

i suppose your laptop has two video cards, a low-power video card and a hight power NVIDIA/ATI graphics card.

Switching between low-power and high-power video cards is the most likely culprit. To confirm, disable one of the video cards, and see if the problem goes away.

It may even be more of a problem for TouchScreens because they have to maintain two calibrations, one for each card.

[Jim Wright (jwright217)]

Why would my laptop have two video cards ?

The specs simply say it has AMD Radeon HD 8400 graphics.
The screen is not a touchscreen either.

Another thing, it would not load Cinnamon on either the live usb or after it was installed.