AMD driver support

[Slumber86]

My 2011 MBP has AMD graphic card, the mod doesn't work with it. Can you patch it? My checksum:

$ md5 -q /System/Library/Extensions/AMDSupport.kext/Contents/MacOS/AMDSupport ac68dd9427ff690c4aac12f9abfcf708

Also if you don't have any way to test it i can help with test and some works.

Thank you

Agostino

[Floris497]

these 2 should patch your driver:

sudo perl -i.bak -pe '$before = qr"\x85\x17\x00\x00\x00\xB8\x40\xB3\xD5\x09"s;s/$before/\x85\x17\x00\x00\x00\xB8\x00\x84\xD7\x17/g' /System/Library/Extensions/AMDSupport.kext/Contents/MacOS/AMDSupport
sudo touch /System/Library/Extensions

check if the values of these 2 commands are different, this indicates that the code has changed

md5 -q /System/Library/Extensions/AMDSupport.kext/Contents/MacOS/AMDSupport
md5 -q /System/Library/Extensions/AMDSupport.kext/Contents/MacOS/AMDSupport.bak

if you want to go back use these

sudo mv /System/Library/Extensions/AMDSupport.kext/Contents/MacOS/AMDSupport.bak /System/Library/Extensions/AMDSupport.kext/Contents/MacOS/AMDSupport
sudo touch /System/Library/Extensions

I have no idea if this will work, i only found 1 occurrence of 165MHz. and changed it to 400MHz. So no idea if this breaks the driver at a different point.. if it does not work, we have to find out what the new limit is..

[Slumber86]

Ok thanks, I'll try when back home. If the patch will broke the driver i can just reboot in recovery?

Thanks.

[Floris497]

If it breaks the driver your integrated graphics will take over, no need for recovery mode. just use the sudo mv command as described above :-)

[Slumber86]

The driver isn't broken, but doesn't activate higher clock rates. Rolling back to default!

[Floris497]

What cable are you using?

[Slumber86]

CableMatters mDP 1.2 to hdmi 1.4, cable not adapter. Reported to work.

[Floris497]

Hm, HDMI 1.4 would be sufficient enough.. Maybe older version not. Can you try and see what the maximum pixel clock is that you can set? The apsolute maximum :)

This way i can try and find that value in the driver and make it higher

[Slumber86]

165 works, 165,01 doesn't. Original driver

[Floris497]

Ehm, let me think.. I looked for both 165 000 000 and 165 000 001 only the first I could find, and changed to 400Mhz