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Yes display maps @0 also on other compatible cards after Nick's vbios, looks like he changed outputs too. For brightness control i tried a lot of different PWM settings but nothing worked so far. So i went for HW mod. Entering EDID is not necessary as it gets detected ok.

Yes no problem. In clover i changed board-id under smbios (on picture) and under Rt Variables i changed BooterConfig (0x0028) and CsrActiveConfig (0x0067) to disable system protection. In DSDT i only modified under Device (GFX0) connector-types, display-connect-flags, hotplug, etc...

No nothing since last post, imac works but brightness still on ful blast. This also generates more heat so i need to find a solution, did not have much time to play with this.

Hi. Yes i read all relevant threads and it seems easy to do it on a hack but not so much on a real mac because all usual hacks are already present here. But i got it to recognize display as internal and got brightness controls back but the brightness doesnt actualy change yet.

I started adding options to my patched DSDT that are present in imac with original card and missing in mine, and discovered why i got black screen with mouse visible and backlight. I must have all 4 connectors inside @0..3, if i put only @3 (where my display is connected) i get black screen...

I found differences in ioreg under PNLF How do i insert options from right ioreg window to my DSDT?

Hello to all great hackers. I see a lot of knowledge in ACPI programming here. I would like to ask for some help because im not so good at this. I have an iMac from late 2009 with i5, 8Gb ram, ssd and now also GTX 765M, old 4850 died as they usualy do in imacs. The card works oob but without...