I created my own DSDT following your instructions and the DSDT guide. Wasn't sure I did it right but audio was working afterwards. I applied all the patches you listed. I will try the other fixes you linked above.
I am having a couple issues but most is working. When waking from sleep desktop goes black, closing the lid doesn't activate sleep, no backlight control for screen, and I can't download from the appstore. Everything else seems to be working well. Haven't had a chance to check HDMI video or audio...
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