why is this working on Linux but not macOS?

[Ashleyyyy]

ok, so i'm wondering what's with this weirdness.

 

i hardware disabled my macbook pro's dGPU, and i have 2 issues. 

the display doesn't work when i wake the system up from sleep, but that's expected. you need to do more modding for that to work.

i can't change the brightness of the display. 

 

HOWEVER

i have the macbok dual-booted with Linux, where everything including sleeping and waking the screen and brightness control works flawlessly. 

 

why? is Apple doing some magic tricks to prevent the system from working properly or what? 

[TheGlenlivet]

Sounds like the issue is in software not hardware and Linux uses the hardware that Mac OS is limiting.

 

[DrMacintosh]

You disabled the dGPU in macOS. macOS is designed to leverage the dGPU while Linux is not. 

[SirReno]

Perhaps on the linux side you are displaying from the CPU rather than the gpu?

[Ashleyyyy]

4 minutes ago, DrMacintosh said:

You disabled the dGPU in macOS. macOS is designed to leverage the dGPU while Linux is not. 

i hardware disabled it as seen here:

https://realmacmods.com/macbook-2011-radeon-gpu-disable/

scroll down to hardware modification steps. 

 

the thing i did not do was modding it so that High Sierra can wake from sleep, because the removing of the resistor was scary enough already. 

[Ashleyyyy]

Just now, SirReno said:

Perhaps on the linux side you are displaying from the CPU rather than the gpu?

nope. 

output from lspci:

00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0116] (rev 09) (prog-if 00 [VGA controller])
    Subsystem: Apple Inc. 2nd Generation Core Processor Family Integrated Graphics Controller [106b:00dc]
    Flags: bus master, fast devsel, latency 0, IRQ 45
    Memory at a0000000 (64-bit, non-prefetchable)
    Memory at 90000000 (64-bit, prefetchable)
    I/O ports at 2000
    [virtual] Expansion ROM at 000c0000 [disabled]
    Capabilities: <access denied>
    Kernel driver in use: i915
    Kernel modules: i915

 

and in system settings details:

[DrMacintosh]

Basically macOS wants it dGPU back since the firmware for the machine is designed with it in mind. Unless you modify it to completely disregard the dGPU and run only on the integrated graphics there are bound to be problems. 

[SirReno]

mmm... i also use manjaro but on windows, so cant help more 

[Ashleyyyy]

1 minute ago, DrMacintosh said:

Basically macOS wants it dGPU back since the firmware for the machine is designed with it in mind. Unless you modify it to completely disregard the dGPU and run only on the integrated graphics there are bound to be problems. 

interesting. the thing is, the dGPU is not even visible in system report anymore. 

 

this is confirmed when running the lspci command in Linux. the dGPU is gone. 

 

it's very interesting to me that i can't even change the brightness on macOS now. 

[MedievalMatt]

28 minutes ago, firelighter487 said:

ok, so i'm wondering what's with this weirdness.

 

i hardware disabled my macbook pro's dGPU, and i have 2 issues. 

the display doesn't work when i wake the system up from sleep, but that's expected. you need to do more modding for that to work.

i can't change the brightness of the display. 

 

HOWEVER

i have the macbok dual-booted with Linux, where everything including sleeping and waking the screen and brightness control works flawlessly. 

 

why? is Apple doing some magic tricks to prevent the system from working properly or what? 

Linux is just better, thats why.

 

 

[Ashleyyyy]

1 minute ago, MedievalMatt said:

Linux is just better, thats why.

 

 

it's better for different things  

 

if i want to go geek mode then it's perfect  

[Guest]

ACPI releated, Linux doesn't wake up that GPU while Mac OS does, you could change this behaviour by some DSDT patching, however is not recommended

[Ashleyyyy]

13 minutes ago, Lukyp said:

ACPI releated, Linux doesn't wake up that GPU while Mac OS does, you could change this behaviour by some DSDT patching, however is not recommended

you mean the dGPU? i hardware disabled it now. it's gone. macOS can't even detect it. 

[TopHatProductions115]

https://www.tonymacx86.com/threads/guide-disabling-discrete-graphics-in-dual-gpu-laptops.163772/

[Shoe_Eater]

The real answer is, if it can be done, linux can do it, and windows probably cannot, and macos being not much better

[Linus_torvalds]

20 hours ago, firelighter487 said:

ok, so i'm wondering what's with this weirdness.

 

i hardware disabled my macbook pro's dGPU, and i have 2 issues. 

the display doesn't work when i wake the system up from sleep, but that's expected. you need to do more modding for that to work.

i can't change the brightness of the display. 

 

HOWEVER

i have the macbok dual-booted with Linux, where everything including sleeping and waking the screen and brightness control works flawlessly. 

 

why? is Apple doing some magic tricks to prevent the system from working properly or what? 

Because linux is better! The kind of thing you did, hardware disabling dGPU is good example. MacOS went crazy about that and does not work properly. Linux does not care

 

P.S. You should have watched louis rossmans videos before buying macbooks. If you bought it before that video was out you are forgiven. Basically EVERY macbook is designed to break! The best option is 2015 macbook pro. Compared to other PCs it's still gurbage but compared to other macbooks it's the best. Latest macbooks are COMPLETE SHIT. Designed to break and to never be fixed by the user. If you even change ANYTHING keyboard, touchpad, screen, battery anything it will brick itself. People should just stop buying THE worst product.

 

 

[Zando_]

7 minutes ago, mate_mate91 said:

Because linux is better! The kind of thing you did, hardware disabling dGPU is good example. MacOS went crazy about that and does not work properly. Linux does not care

 

P.S. You should have watched louis rossmans videos before buying macbooks. If you bought it before that video was out you are forgiven. Basically EVERY macbook is designed to break! The best option is 2015 macbook pro. Compared to other PCs it's still gurbage but compared to other macbooks it's the best. Latest macbooks are COMPLETE SHIT. Designed to break and to never be fixed by the user. If you even change ANYTHING keyboard, touchpad, screen, battery anything it will brick itself. People should just stop buying THE worst product.

 

Truth, older MacBooks are better than the newest ones longevity wise, my mid-2012 13" works fine with 16GB RAM and an SSD, and my cousin has had 0 problems with his 2015 15", it's probably one of the best MacBook Pros ever. The 2015 ones are still darn slim too, while having more usable ports if you hate dongles. You'd only need the newest new ones if you need TB3 or just really like the newer MBPs. 

[Ashleyyyy]

11 hours ago, mate_mate91 said:

P.S. You should have watched louis rossmans videos before buying macbooks. If you bought it before that video was out you are forgiven. Basically EVERY macbook is designed to break! The best option is 2015 macbook pro. Compared to other PCs it's still gurbage but compared to other macbooks it's the best. Latest macbooks are COMPLETE SHIT. Designed to break and to never be fixed by the user. If you even change ANYTHING keyboard, touchpad, screen, battery anything it will brick itself. People should just stop buying THE worst product.

i bought it for a few reasons. 

• i got a good deal
• i need macOS for a few things
• 16:10 display 
• good keyboard

 

11 hours ago, Zando Bob said:

Truth, older MacBooks are better than the newest ones longevity wise, my mid-2012 13" works fine with 16GB RAM and an SSD, and my cousin has had 0 problems with his 2015 15", it's probably one of the best MacBook Pros ever. The 2015 ones are still darn slim too, while having more usable ports if you hate dongles. You'd only need the newest new ones if you need TB3 or just really like the newer MBPs. 

the older 13" one's are very reliable because they don't have a dGPU. 

 

EDIT: the newer one's don't either, nevermind.

[Zando_]

6 minutes ago, firelighter487 said:

i bought it for a few reasons. 

• i got a good deal
• i need macOS for a few things
• 16:10 display 
• good keyboard

 

the older 13" one's are very reliable because they don't have a dGPU. 

 

EDIT: the newer one's don't either, nevermind.

The new ones have dGPUs (specifically the 2015 15" we were reccomending), but they're good. The old 15" ones are apparently pretty terrible and the dGPUs break all the time. RIP.

[Ashleyyyy]

1 hour ago, Zando Bob said:

The new ones have dGPUs (specifically the 2015 15" we were reccomending), but they're good. The old 15" ones are apparently pretty terrible and the dGPUs break all the time. RIP.

yep. exactly why i disabled mine. i don't know what apple's problem was in the late 2000's and early 2010's but those 15" machines are extremely unreliable because of the gpu's.