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adrelanos
07-23-2015, 10:35 AM
My notebook's CPU:
i7-3840QM

The internet says, this CPU usually comes with an internal GPU:
Intel HD Graphics 4000

I would like to use that internal GPU.

This is tricky. There is no BIOS setting. And the forum says, this is difficult, because the Intel HD is not even connected on the board by default.

The asus forums says (https://www.google.com/url?q=https%3A%2F%2Frog.asus.com%2Fforum%2Fshowthr ead.php%3F71142-how-to-ENABLE-INTEL-hd-4600-in-ASUS-g750JW%26highlight%3Dintel%2Bhd&sa=D&sntz=1&usg=AFQjCNEtN0HiuPz07SQ2KytWoJRY2_OItQ) for a very similar notebook, that one has to solder and be "experienced electrical engineer with access to a chip development plant". I am willing to pay a professional to do that.

Therefore my question is, has anyone ever gone that route, modified an Asus G75 to make the internal Intel HD gpu work?

(Trivia: Why? Qubes / LInux user. Nvidia driver issues. Intel HD is generally known to work better. Long story short:
https://groups.google.com/d/msg/qubes-users/q2GDI84gzqY/3IbVIU2WCBYJ)

C4RN1
07-23-2015, 03:21 PM
Read a little about the Optimus Platform

http://www.nvidia.com/object/optimus_technology.html

http://www.geforce.com/hardware/technology/optimus/technology

https://en.wikipedia.org/wiki/Nvidia_Optimus

Pretty much the Optimus platform will use the integrated intel hd graphics when it's not demanding performance. When you load a game the Nvidia drivers will detect a program needing the better graphics and switch. Simply put, Optimus helps notebooks conserve battery life.

Now you could try to disable the Nvidia graphics in the device manager, and you could also try to do a custom bios mod. Unfortunately the current Asus bios doesn't support changing any settings for the Optimus platform. Soldering something to the motherboard would be your last resort, there's really no reason to modify the motherboard.

You are in luck since the previous gen G-series laptops (G53, G73, G74) all had discreet gpu's that were utilized 100% of the time. You could not enable the integrated graphics from the cpu.

So those are your options.

adrelanos
07-23-2015, 07:30 PM
Pretty much the Optimus platform will use the integrated intel hd graphics when it's not demanding performance. When you load a game the Nvidia drivers will detect a program needing the better graphics and switch. Simply put, Optimus helps notebooks conserve battery life.

I don't have optimus. I don't mind about battery life. I like to use Intel HD and avoid nvidia for other purposes. (See original post.)



Now you could try to disable the Nvidia graphics in the device manager,

There is no device manager in Qubes / Linux.



and you could also try to do a custom bios mod.

Interesting. Where do I get this?



Unfortunately the current Asus bios doesn't support changing any settings for the Optimus platform.

I don't have Optimus. But the BIOS of the ASUS G75VW does not have an option to disable the discrete nvidia or to enable the internal intel HD gpu.



Soldering something to the motherboard would be your last resort, there's really no reason to modify the motherboard.

I would certainly prefer to avoid soldering. For one because of the risk. Also because it costs money.

However, I don't know if that's possible without soldering. I've read here in the forums, that the G75 does not have the connected Intel HD gpu to the board by default. Only the disrete nvidia. And one would have to solder to enable the Intel HD.



You are in luck since the previous gen G-series laptops (G53, G73, G74) all had discreet gpu's that were utilized 100% of the time.
You could not enable the integrated graphics from the cpu.

And with the G75 that is no longer the case? Meaning, with the G75 you can somehow use the internal Intel HD gpu?

I was wondering if anyone succeeded in doing this. That's the purpose of this thread.

C4RN1
07-24-2015, 02:33 PM
EDIT: Sorry looks like the G75 variants are among the older G series that didn't have Optimus. Though since the G75 has the 660m and up it could definitely support it. If you look back in the older posts where Chastity was still active on this forum she responded that the motherboards were designed not to support Optimus for good reason. I'd like to know what that reason is. Your best bet is to sell your G75 and upgrade to the G750.

Clintlgm
07-24-2015, 02:54 PM
I think you are correct I think Asus purchased these CPU with the HD Graphics not enabled either disabled or never in the chips to start withe. I don't remember any of the G75 having the Intel graphics enabled. It seems to me the first to have this was the G750's and there were major problems and aggravations with this on the G750 so that with the G751 it was disabled again. I could be wrong but this is how I remember it.