ASUS laptops with optimus. Fan speed issue.

[XPbIM3]

Hi!
I am using an ASUS FX753 laptop with i7-7700 and nVidia GTX1050 with MacOS High Sierra.
Obviously nVidia GTX1050 optimus is not supported under MacOS, so I shut it OFF in DSDT. And the following issue revealed:
Booting up with nVidia graphics swithed off results in after approx 30sec cooling fan start to blow at 100% speed and shuts off only at shut down. Even reboot doesnt resets fan speed.

It seems that its a popular issue with modern ASUS laptops with nv optimus, I found alot of topics from linux users describing the same issue on ASUS FX753, GL753, GL502 laptops.
Like that:
https://rog.asus.com/forum/showthre...sue-on-GL753VE-nvidia-bumblebee-bbswitch-ACPI

Is anybody facing the same issue? Any thoughts on fixing that?

 

[RehabMan]

Hi!
I am using an ASUS FX753 laptop with i7-7700 and nVidia GTX1050 with MacOS High Sierra.
Obviously nVidia GTX1050 optimus is not supported under MacOS, so I shut it OFF in DSDT. And the following issue revealed:
Booting up with nVidia graphics swithed off results in after approx 30sec cooling fan start to blow at 100% speed and shuts off only at shut down. Even reboot doesnt resets fan speed.

It seems that its a popular issue with modern ASUS laptops with nv optimus, I found alot of topics from linux users describing the same issue on ASUS FX753, GL753, GL502 laptops.
Like that:
https://rog.asus.com/forum/showthre...sue-on-GL753VE-nvidia-bumblebee-bbswitch-ACPI

Is anybody facing the same issue? Any thoughts on fixing that?

No "Problem Reporting" files attached.
Read FAQ, "Problem Reporting" again. Carefully. Attach all requested files/output.
https://www.tonymacx86.com/threads/faq-read-first-laptop-frequent-questions.164990/
Use the gen_debug.sh tool mentioned in the FAQ, that way it is less likely you'll omit something.

Also, your profile has no hardware details. Please fix as per FAQ.

 

[XPbIM3]

No "Problem Reporting" files attached.

debug_32445 - dump with nVidia enabled, untouched DSDT
debug_2347 - dump with nVidia DISABLED via DSDT patch

 

[XPbIM3]

I do thing those dumps will provide no help.
The issue itself is very common under linux systems. It might be the case that EC has a somewhat like a watchdog timer, listening to nvidia chip thermal/power status, and when nvidia chips shuts off, EC thinks nv chip "hanged" and applies a safety fan=100% strategy. Only ASUS knows how this works.
There is some posts reporting similar bug appearing randomly under windows.

 

[RehabMan]

...

You have done nothing here to disable the Nvidia.
Refer to the guide:
https://www.tonymacx86.com/threads/guide-disabling-discrete-graphics-in-dual-gpu-laptops.163772/

And MacBookPro14,3 is a very poor choice. Use MacBookPro14,1 or MacBookPro11,1.

 

[XPbIM3]

You have done nothing here to disable the Nvidia.

Take a look again, posted a second dump.

 

[RehabMan]

Take a look again, posted a second dump.

You didn't follow the guide.
You should be adding an _INI in SSDT-9 to call _OFF or more likely _PS3.

For example, in SSDT-9 right before _PS3:

Method(_INI)
{
   OPCE=3
   _PS3()
}
        Method (_PS3, 0, NotSerialized)  // _PS3: Power State 3
        {
...

(setting OPCE=3 and calling _PS3 instead of _OFF has been shown to be needed for proper fan control)

 

[XPbIM3]

You didn't follow the guide.
You should be adding an _INI in SSDT-9 to call _OFF or more likely _PS3.
(setting OPCE=3 and calling _PS3 instead of _OFF has been shown to be needed for proper fan control)

Did that.
Results in same behavior: fan bumps up to limit after ~30secs.

 

[RehabMan]

Did that.
Results in same behavior: fan bumps up to limit after ~30secs.

ACPI not patched correctly.
Basic patches such as _OSI spoofing are not implemented.
Refer to the guide:
https://www.tonymacx86.com/threads/guide-patching-laptop-dsdt-ssdts.152573/

Also, patching OEM SSDTs requires correct config.plist/ACPI settings. Yours are wrong.
The correct settings (AutoMerge=true, for example) are covered in the guide above, but also the guide plists start out with correct settings:
https://www.tonymacx86.com/threads/guide-booting-the-os-x-installer-on-laptops-with-clover.148093/

 

[XPbIM3]

Basic patches such as _OSI spoofing are not implemented.

AutoMerge=true

Played some with _OSI injecton - no changes.
Decided to do add a debug calls into EC methods using Store("EC method name, Debug") call
As I already said the machine boots up and nVidia successfully shuts off, but after approx 30secs a fan bumps up.
So If do a "log stream" right after boot up, then the following call will be thrown and right in that moment when fan goes crazy:

Last login: Tue Dec 11 02:48:22 on console
MacBook-Pro-xpbim3:~ xpbim3$ /Users/xpbim3/Desktop/log.sh ; exit;
2018-12-10 21:48:45.448454+0000 0x122      Default     0x0                  0      kernel: (AppleACPIPlatform) [ACPI Debug]
2018-12-10 21:48:45.448471+0000 0x122      Default     0x0                  0      kernel: (AppleACPIPlatform) [ACPI Debug]
2018-12-10 21:48:45.448481+0000 0x122      Default     0x0                  0      kernel: (AppleACPIPlatform) "EC _QB1 enter"
2018-12-10 21:48:45.448483+0000 0x122      Default     0x0                  0      kernel: (AppleACPIPlatform) "EC _QB1 enter"
2018-12-10 21:48:45.448677+0000 0x122      Default     0x0                  0      kernel: (AppleACPIPlatform) [ACPI Debug]
2018-12-10 21:48:45.448679+0000 0x122      Default     0x0                  0      kernel: (AppleACPIPlatform) [ACPI Debug]
2018-12-10 21:48:45.448687+0000 0x122      Default     0x0                  0      kernel: (AppleACPIPlatform) "EC _QB1 exit"
2018-12-10 21:48:45.448690+0000 0x122      Default     0x0                  0      kernel: (AppleACPIPlatform) "EC _QB1 exit"

And vice-versa: no nVidia shutdown and no QB1 call.

The EC method QB1 is:

        Method (_QB1, 0, NotSerialized)  // _Qxx: EC Query
        {
            Store (0xB1, P80H)
        }

I did commented that line - no luck. Fan does the same.
Looked for _QB1 calls all over entire ACPI code - I though it may be called from somewhere else but nope....
Any help will be appreciated.