Max resolution not working with QE/CI enabled

[itunesusa]

Hi everyone,

 

I've started my hackintosh project a couple of months ago, actually I installed it the week Lion was released. It took me some time to figure out how to make it all work. Now it's running smoothly - except one big issue: I can't get my display to show its native resolution when hardware acceleration is enabled.

 

OS: OS X Lion 10.7.1

Bootloader: Chameleon 2.1.svn-r1573

TFT: Samsung SyncMaster 225BW

Graphics: ATI Radeon HD 4850

 

Windows and Linux have no problem with my display. There I get my 1680x1050x32@59Hz over DVI and D-Sub.

The Apple Software Renderer works with native resolution when I don't patch my ATI4800Controller.kext. There's just too much that depends on hardware acceleration (like vlc, chrome, etc.) so that's no option. Thanks to Netkas' exotic patch I have full QE/CI with my card but the only working mode is 1280x1024. Any mode else turns off the display - except 1680x1050x32@75Hz via SwitchResX, but this one makes my desktop look like made with Lego. The pixel clock seems to high in this case.

I've also tried a lot of manual tweaking with SwichResX (CVT-RB, CVT, GTF at 59, 60 and 75 Hz, different pixel clocks,…). What surprises me most is the EDID. It's the same as in Windows or Linux, still it's not working with these values.

 

Does someone what I'm doing wrong? I appreciate any comment.

 

Established Timings:

--------------------

720 x 400 @ 70Hz

640 x 480 @ 60Hz

640 x 480 @ 67Hz

640 x 480 @ 72Hz

640 x 480 @ 75Hz

800 x 600 @ 56Hz

800 x 600 @ 60Hz

800 x 600 @ 72Hz

800 x 600 @ 75Hz

832 x 624 @ 75Hz

1024 x 768 @ 60Hz

1024 x 768 @ 70Hz

1024 x 768 @ 75Hz

1280 x 1024 @ 75Hz

 

Manufacturer Reserved Timings:

------------------------------

1152 x 870 @ 75Hz

 

Standard Timing Identification:

-------------------------------

#0: 1680 x 1050 @ 60Hz (B300)

#1: 1280 x 1024 @ 60Hz (8180)

#2: 1280 x 960 @ 60Hz (8140)

#3: 1152 x 864 @ 75Hz (714F)

 

Monitor Description blocks:

---------------------------

Descriptor #0 - Timing definition:

Mode = 1680 x 1050 @ 59,954Hz

Pixel Clock............. 146,25 MHz Non-Interlaced

 

Horizontal Vertical

Active.................. 1680 pixels 1050 lines

Front Porch............. 104 pixels 3 lines

Sync Width.............. 176 pixels 6 lines

Back Porch.............. 280 pixels 30 lines

Blanking................ 560 pixels 39 lines

Total................... 2240 pixels 1089 lines

Scan Rate............... 65,290 kHz 59,954 Hz

 

Image Size.............. 474 mm 296 mm

Border.................. 0 pixels 0 lines

 

Sync: Digital separate with

* Positive vertical polarity

* Negative horizontal polarity

 

Descriptor #1 - Monitor limits:

Horizontal frequency range.......30-81 kHz

Vertical frequency range.........56-75 Hz

Maximum bandwidth unspecified