[Sticky] Can't get 2015 13" MBP eGPU detection  

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nando4
Reputable Member
Joined: 2 months  ago
Posts: 255
December 27, 2016 1:51 am  

Would you mind seeing if putting a very thin piece of cellophane (sticky) tape over the PERST# pin on your video card, pinout as shown at https://egpu.io/forums/mac-setup/egpu-setup-1-30/#post-74 ,  alleviates this workaround altogether? Matt suggests a couple of posts up that it does.

 
Posted by: ddoc

 

Sorry I realize now that was ambiguous. This is what I was talking about:
 
Posted by: Matt

1. Boot into MacOS with no eGPU connected

2. Run the automate eGPU script with the -a flag.

3. Shutdown

4. Unplug the power to the eGPU THEN plug the TB cable into the Mac. 

5. Boot to the boot manager screen

6. When the mouse becomes free to move (takes around 5 seconds) plug the power into the eGPU

7. if it doesn't freeze continue to boot into Windows.

8. This will work more often than other techniques I've tried. 

    

   

DIY eGPU Setup 1.31 [was 1.30]eGPUing since '09


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ddoc
 ddoc
Active Member
Joined: 3 weeks  ago
Posts: 5
December 27, 2016 1:35 pm  

I put some tape over the specified pin and didnt get any result on my first try. My tape isn't very good though its not staying in place.. Ill try again later and post an update.

Update:

Tried with better tape and I'm not able to get any kind of consistent result. Maybe I'm reading the pinout diagram incorrectly? I attached a photo of the pin I'm covering. Maybe I can paint it with nail polish or something? In the photo I used electrical tape, I don't recommend that its pretty thick.  I tried again with cellophane and didn't have any different result. I did not try attaching a wire, but I don't know how I would secure it there anyway.

I estimate it worked 2/10 tries. One of them was following the same manual 8 step procedure as before. One was 'as expected' with everything powered on and plugged in before booting the MBP. Feels like luck.

 

1482948702-IMG0346.jpg
Edited: 3 weeks  ago

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nando4
Reputable Member
Joined: 2 months  ago
Posts: 255
December 28, 2016 3:07 pm  

Close, but unfortunately the wrong location for the tape.

Pls put the tape on the same pin location but on the other side of the card and test again.

Posted by: ddoc

 

I put some tape over the specified pin and didnt get any result on my first try. My tape isn't very good though its not staying in place.. Ill try again later and post an update.

Update:

Tried with better tape and I'm not able to get any kind of consistent result. Maybe I'm reading the pinout diagram incorrectly? I attached a photo of the pin I'm covering. Maybe I can paint it with nail polish or something? In the photo I used electrical tape, I don't recommend that its pretty thick.  I tried again with cellophane and didn't have any different result. I did not try attaching a wire, but I don't know how I would secure it there anyway.

I estimate it worked 2/10 tries. One of them was following the same manual 8 step procedure as before. One was 'as expected' with everything powered on and plugged in before booting the MBP. Feels like luck.

 

DIY eGPU Setup 1.31 [was 1.30]eGPUing since '09


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ddoc
 ddoc
Active Member
Joined: 3 weeks  ago
Posts: 5
December 28, 2016 6:12 pm  

Worked first try! Windows took about 3 minutes to boot. Normally its about 30 seconds. Ill reboot a few times and see how it goes now.

Update:

I haven't been able to get this to work again.

Update 2:

After more tries it seems important the the GPU and Akitio are  both tottaly de-powered before starting. I have been leaving the TB cable plugged in, and powering up the eGPU (card and chassis) after a 10 second pause at the boot menu, and then promptly selecting windows. Seems to work 75% of the time. Could still be luck. Ill update again after more use in a week or so.

 

Update 3:

I painted the pin with some nail polish and the OS stopped recognizing that there was a GPU installed. In OSX automate-egpu.sh reported a thunderbolt device connected but no GPU. Windows never recognized it. After scraping off the paint things were back to 'normal'. My conclusion is that any perceived improvement in behavior due to tape over the pin was purely luck and the tape was probably just ineffective. 🙁 I even reinstalled my OS (downgraded Win10 to Win8.1) and tried with and without tape and there was no difference that I could measure.

Edited: 4 days  ago

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loligans
New Member
Joined: 2 weeks  ago
Posts: 1
December 31, 2016 12:26 am  
Posted by: ddoc

 

Worked first try! Windows took about 3 minutes to boot. Normally its about 30 seconds. Ill reboot a few times and see how it goes now.

Update:

I haven't been able to get this to work again.

Update 2:

After more tries it seems important the the GPU and Akitio are  both tottaly de-powered before starting. I have been leaving the TB cable plugged in, and powering up the eGPU (card and chassis) after a 10 second pause at the boot menu, and then promptly selecting windows. Seems to work 75% of the time. Could still be luck. Ill update again after more use in a week or so.

   

Which Macbook are you running?

What is the GPU you are using?

What eGPU enclosure are you using?


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ddoc
 ddoc
Active Member
Joined: 3 weeks  ago
Posts: 5
January 1, 2017 2:42 pm  
Posted by: ddoc

 

 2015 MBP Akitio thunder2 Zotac/gtx1060 Win10

 

 

   


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johnshea
New Member
Joined: 4 weeks  ago
Posts: 3
January 10, 2017 8:30 am  
Posted by: ddoc

 

Sorry I realize now that was ambiguous. This is what I was talking about:
Posted by: Matt

1. Boot into MacOS with no eGPU connected

2. Run the automate eGPU script with the -a flag.

3. Shutdown

4. Unplug the power to the eGPU THEN plug the TB cable into the Mac. 

5. Boot to the boot manager screen

6. When the mouse becomes free to move (takes around 5 seconds) plug the power into the eGPU

7. if it doesn't freeze continue to boot into Windows.

8. This will work more often than other techniques I've tried. 

   

Great balls of fire! This works! I have a 2013 rMBP with a 750m eGPU and have had consistent black-screen-at-boot issues for two years. This method is the first one I've tried that appears, so far, to be consistently successful. 

Holy crap guys. This is awesome. Many thanks.


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madjester
New Member
Joined: 2 days  ago
Posts: 1
January 15, 2017 12:40 pm  

Unfortunately Matt's path doesn't seem to be working consistently on the 2015 13" MBP (Akitio TB 2, DA-2, EVGA 1060.) Windows 10 does occasionally boot with everything working but it takes several boots and there doesn't seem to be a reproducible path, just randomly works. Haven't tried the PIN trick mentioned above or just leaving it in OSX with an external monitor yet. 

(BTW huge thank you to all the Devs, when the Mac does cooperate, it is quite awesome.)


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