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MBP 1,1-10,2 Permanently Disable 2011 15"/17" MacBook Pro Dedicated GPU - gMux IC Bypass
- Thread starter dosdude1
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I tried it. Unfortunatly i am having white screen issue. Did you do anything different sir with a1297 sir?
[doublepost=1550161971][/doublepost]I tried it. Unfortunatly i am having white screen issue. Did you do anything different sir with a1297 sir?
[doublepost=1550161971][/doublepost]I tried it. Unfortunatly i am having white screen issue. Did you do anything different sir with a1297 sir?
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Yeah, you'll need to wire the enable lines as follows:
- Connect LVDS_IG_BKL_ON to LCD_BKLT_EN
- Connect LVDS_IG_PANEL_PWR to LCD_PWR_EN
- Connect PP3V3_S0 to LCD_BKLT_PWM
I have an issue and conspiracy theory whit the backlight on High Sierra....
I just got another MBP for modification here. I did the efivars entry and removed the R8911. After a successful boot i was confronted whit a Login screen and did not had any password. So i mailed the owner to send me his password. Before shutting down i tested the brightness control by pressing F1 and F2 and it worked, so... good it is not High Sierra.
Now after receiving the password I booted the machine again and logged in. And.. it is High Sierra and the brightness controls didn't worked any more.
Now comes the conspiracy theory: For sure Apple knows about modifications to the MBP 2011, it is up and down the internet. So I think Apple just programmed something into high sierra to disable the Backlight controls for this model whit deactivated DGPU. Otherwise why would the backlight controls working on the 13" Model whit the same kind of CPU, and why does it work right after the modification while not logged in? After a reboot it didn't worked any more.
I planned to make some tests. On mine MBP I soldered 2 wires so i could easily enable the GPU again. I am going to install High Sierra on another machine and transfer the harddisk into the MBP to see what happens. Also will try to enable the GPU again.
I don't suppose it is in the Serial Number. The MBP was not connected to the internet. I could imagine it could be the model number. The 13" is the MacBookPro8.1 and the 15" is the MacBookPro8.2
I just got another MBP for modification here. I did the efivars entry and removed the R8911. After a successful boot i was confronted whit a Login screen and did not had any password. So i mailed the owner to send me his password. Before shutting down i tested the brightness control by pressing F1 and F2 and it worked, so... good it is not High Sierra.
Now after receiving the password I booted the machine again and logged in. And.. it is High Sierra and the brightness controls didn't worked any more.
Now comes the conspiracy theory: For sure Apple knows about modifications to the MBP 2011, it is up and down the internet. So I think Apple just programmed something into high sierra to disable the Backlight controls for this model whit deactivated DGPU. Otherwise why would the backlight controls working on the 13" Model whit the same kind of CPU, and why does it work right after the modification while not logged in? After a reboot it didn't worked any more.
I planned to make some tests. On mine MBP I soldered 2 wires so i could easily enable the GPU again. I am going to install High Sierra on another machine and transfer the harddisk into the MBP to see what happens. Also will try to enable the GPU again.
I don't suppose it is in the Serial Number. The MBP was not connected to the internet. I could imagine it could be the model number. The 13" is the MacBookPro8.1 and the 15" is the MacBookPro8.2
Hi all,
I’ve got to my third late 2011 MacBook repair. IT was powering in but hanging after the load bar, when the gui normaly shows. Sometimes It only shimed and had backlight but black screen. I tried to reflow iT first, to make sure iT was the GPU, before i proceded. After reflowing i had a permanent black screen. But Shiming and backlight. So i removed the gmux ic, cut power to the egpu and die the wireing like the previous 2. However I still have the same symptoms. LVDS_DDC_SEL_IG Is present.
Any idea how to proceed from here?
Thnx in advance. Btw, sorry for typo’s and bad english. Typing from my cellphone and english not Being my mother tongue.
I’ve got to my third late 2011 MacBook repair. IT was powering in but hanging after the load bar, when the gui normaly shows. Sometimes It only shimed and had backlight but black screen. I tried to reflow iT first, to make sure iT was the GPU, before i proceded. After reflowing i had a permanent black screen. But Shiming and backlight. So i removed the gmux ic, cut power to the egpu and die the wireing like the previous 2. However I still have the same symptoms. LVDS_DDC_SEL_IG Is present.
Any idea how to proceed from here?
Thnx in advance. Btw, sorry for typo’s and bad english. Typing from my cellphone and english not Being my mother tongue.
You did a Reflow to test a failing GPU? This GPU Series has Problems whit hairline crack between the Core board and the DIE. A Reflow would not solve the problem, well it could shorten some hairline cracks for a short time.
Hmmmmm next time just enter sudo nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefs=%01%00%00%00 and reboot. This forces the NVRAM to use the integrated GPU instead of the EGPU. This is much faster than a Reflow and less (what is the right English word) destructive. Could be something different is now defective.
Hmmmmm next time just enter sudo nvram fa4ce28d-b62f-4c99-9cc3-6815686e30f9:gpu-power-prefs=%01%00%00%00 and reboot. This forces the NVRAM to use the integrated GPU instead of the EGPU. This is much faster than a Reflow and less (what is the right English word) destructive. Could be something different is now defective.
I bypass the gmux instead as a permanent solution; that's why we are in this topic and not the nvram topic.. Did this 2 times successfully allready. However, this time I ran into an issue. Thnx for your comment but it isn't realy helpfull.
P.s. the "core board" you refer to is called an interposer.
Yes, i know. But for testing purpose the NVRAM variable is a quick test. Better that reflowing, at least that is my opinion.
Interposer it is called. Good to know. I just translated it from German.
Interposer it is called. Good to know. I just translated it from German.
Well, most of my mbp's are from ebay. (affected units). They often ship without a drive.
I noticed, that when I want to boot a high sierra usb-stick, that I get the apple logo with progress bar.
After the progress bar finishes, it get's stuck at a grey screen. (when the guy has to show).
I guess that acceleration kick in at that moment and because of the failed radeon, it get's stuck in that state.
That's why I wanted to apply heat, to see if it get's pas this. Since I can't get to a shell the modify the nvram variable.
funny thing is that I got that black screen after applying the heat. I allready inspected the board around gpu and gpu memory area for missing components. (because of the airflow of the hot air) But I can't seem to find any.
yesterday evening/night, I redid my complete wireing to no avail.
So I have no clue what's missing. measuring at and around the lvd's connector seems to indicate that everything is present. So I'm a bit out of clues right now.
I see. I have a little other approach. I have harddisk whit Remote Desktop enabled. I just plug the harddisk into the MBP, boot from it and take remotely control over the MBP. Than i perform the NVRAM variable and reboot. Mostly i have screen after this. So i know it is only the GPU.
Hmm but selling those. What do you tell people about the not working TB-Monitor output and the Backlight control?
I may try this modification on the next one. I just bought another defective for the non glare display for mine MBP.
Hmm but selling those. What do you tell people about the not working TB-Monitor output and the Backlight control?
I may try this modification on the next one. I just bought another defective for the non glare display for mine MBP.
Well, to be honest, I have sold one.
To a friend of a collegue of mine. I just told what the problem is with those 2011 models and what I have done. (+ the consequences). Buying one with a working radeon seems a lot more risk to a normal user then one allready modified. The ones with working radeons are probably timebombs.
However, I bought 2 units from the us (105-115 euro's) but tax and shipping included, we are allready close to 200 euro.
Most of them come without a disk and with a defective battery. So unless the price is realy low, it's not worth the hassle (for resale). You also have the explain the whole 2011 mbp gpu problem and what you did to get around it + the consequences.
I live in Belgium, so most people would want an azerty keyboard as well. This offcourse doesn't fit (unless you change the palmrest as well), because the enter-key is a different form. I however bought a german one with qwertzu keyboard and they can be replaced with an azerty one.
So, I'm a bit hesitant to buy other units right now. Unless they are a real bargain.
I just bought one for 150€ on eBay Kleinanzeigen. There are some more for that price on there. But whit German Keyboard layout. I prefer US-Layout. I lived in the Netherlands for 23 years and used to the US-Layout.
Hi there, why i cannot install windows on my Bypassed macbook pro 15inch 2011 model ? every time i install windows and when all drivers was installed the screen showed wrong resolution, and also sometimes goes to black screen. it just randoom action. any body can explain this ?
[doublepost=1551980867][/doublepost]Hi dosdude1,
Can you help .I am going crazy with A1286 820-2915.
Did the jumps as per your original post and all worked fine.
The next two done identically ( same model same board ) no backlight.
Tried as per you updates still no backlight.
With or without MuxHat same result.
If there a definitive drawing for the wiring.
All I want is to turn the ........ backlight on !
BTW there is an unbacklit image on the screen
Regards Peter
There is not... I build and sell the modules myself, so at this point, the only way you can get them is to buy them from me.
Hi dosdude1,
Can you help .I am going crazy with A1286 820-2915.
Did the jumps as per your original post and all worked fine.
The next two done identically ( same model same board ) no backlight.
Tried as per you updates still no backlight.
With or without MuxHat same result.
If there a definitive drawing for the wiring.
All I want is to turn the ........ backlight on !
BTW there is an unbacklit image on the screen
Regards Peter