nvidia-prime doesn't turn off Nvidia card while using intel graphics

Question

So I'm using nvidia-352-updates and nvidia-prime. It also installed bbswitch and some other packages.
I've set nvidia-prime to use the Intel card. It is using that card but powertop reports that the nvidia card is still ON.

Then, I've tried setting off the nvidia card with sudo tee /proc/acpi/bbswitch <<<OFF but the card remains ON.

Is there any way to turn it off? Or I'll have to blacklist the nvidia card?

00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09)
01:00.0 VGA compatible controller: NVIDIA Corporation GF108M [GeForce GT 630M] (rev a1)

Also, my card is a 620M but somehow lspci detects a 630M, will that cause any error? are those cards different?

Welcome to Ask Ubuntu! ;-) Can you disable the card in your BIOS? (that's what I do!) :-) — Fabby, Feb 06 '16 at 22:31
Blacklisting or uninstalling the driver is your only option then! :-( Want me to convert this to an answer??? — Fabby, Feb 06 '16 at 23:20
Okay. I just added bbswitch.conf to /etc/modprobe.d and write options bbswitch load_state=0 so with that it remains off until I use it at least. — Maccer, Feb 06 '16 at 23:44
Thank you for the acceptance! favour returned! You're an 8-rep user already! ;-) — Fabby, Feb 07 '16 at 23:35

score 1 · Accepted Answer · edited Apr 13 '17 at 12:23

To disable any hardware (nVidia or otherwise):

Remove the hardware from the machine if you'll never need it again. (this includes removing nVidia, WiFi, ... hardware from laptops)
If you only need the hardware infrequently: disable it in the BIOS (that's how I run with my nVidia card: enable it when needed)
If your set-up, doesn't allow you to disable/remove your hardware blacklisting the kernel module until your need it is your best choice.

nvidia-prime doesn't turn off Nvidia card while using intel graphics

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