Switching off seems to work correctly. Before issuing the echo OFF command I saw this:
and after issuing that command:
However, the disappointment is that it doesn't make any difference. Before and after the current is 2861000 according to /sys/class/power_supply/BAT0/current_now
. I interpret that as 2.86 A, which is a lot at a battery voltage of 11V.
When I wait until the backlight switches off, the current becomes 2.2 A.
The CPU is running at 800 MHz, so power scaling seems to work as well.
I think I either drew a premature conclusion on the NVIDIA power consumption, or switching off was not succesful. But 0:\DIS: :Off:0000:01:00.0
confirms that it is switched off, isn't it?