Macbook air 820-00165-A fixing

[bargo]

The good thing is that, now I know all the stuff are working, because they were successfully initialized by linux drivers, including wifi/bluetooth, keyboard USB. I just need to get the correct bios.

Oh man, I have a chime now apparently this guy is good to go for a round of testing

[bargo]

Right now I have this 820-00165-A and another brother 820-00165-A logic board both working on the same level.

I have a problem with both logic boards that could be due to something I don't yet know. They pass all Apple diagnostic with ADP000 result which means no errors were found. When I boot into OSX on Big Sur or later Monetery, I get a very slow machine, the speed of the processor on both logic boards are constantly at 800Mhz according to the powermetrics.

I then booted into Ubuntu for both logic boards the processor speeds were changing according to load just as normal so I can see 2500Mhz and 500Mjz

my IMON circuitry seems to be fine except that OSX needs something special, while linux run the processor on its optimal speed as needed.

[mon2]

https://www.it-tech.com.au/how-to-re...way-issue/amp/

[bargo]

https://www.it-tech.com.au/how-to-re...way-issue/amp/

The osx loads fine in my case, its not stuck, but its very slow clokcing at half default base clock of 1.6ghz so its clocking at 800mhz always

I have identified one reason for the Performance throttling and it seems to be due to this thing "GPU LIMIT GTDRIVER" according to powermetrics

Whats more interesting I could not find any search engine result with that matched string "GPU LIMIT GTDRIVER"

[mon2]

Still review the shared link - from the landing page:

This cross-checking confirms that the logic board is faulty, but not “stop” booting, just extremely slow.

[bargo]

Still review the shared link - from the landing page:

This cross-checking confirms that the logic board is faulty, but not “stop” booting, just extremely slow.

I will do so, seems to be relevant but both logic boards with the same issue, only on OSX

[bargo]

Yes as I guessed its not actually logical, just go for another round of batteries and both logic boards are working again just in their full clocks as normal..