Thread: DVI and HDMI ports not working on 6870

I need your guys' help.

I have a Gigabyte AMD Radeon 6870 1GB GDDRS on a Gigabyte GA-Z68XP-UD3 mobo, and none of my graphics card's ports are working correctly. I get the most consistent picture from the top DVI port, but only when I use a DVI to VGA adapter, and even that has started going out randomly. When I plug a DVI cable into the top DVI port, I get a very intermittent picture filled with static. The bottom DVI port doesn't put out a signal at all. I can sometimes get a picture from the HDMI port, but it's very unreliable. I don't have any Mini Displayport cables or adapters to test those ports.

I've done my research, but nothing has helped. I looked up my card in tonymacx86's graphics card database, but when I applied Andy's ATI patch it bricked my machine and I had to reinstall Lion. I've read this thread on framebuffer personalities and applied what I learned there and in other similar threads, to no result. Here is my current Boot.plist file:

Code:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Kernel</key>
	<string>mach_kernel</string>
	<key>Kernel Flags</key>
	<string>npci=0x2000 darkwake=0</string>
	<key>GraphicsEnabler</key>
	<string>Yes</string>
	<key>AtiConfig</key>
	<string>Duckweed</string>
	<key>AtiPorts</key>
	<string>4</string>
	<key>Timeout</key>
	<string>2</string>
	<key>Legacy Logo</key>
	<string>Yes</string>
	<key>EthernetBuiltIn</key>
	<string>Yes</string>
</dict>
</plist>

(I have also tried Bulrushes as the personality, but it just made things worse.)

I have run kextstat in Terminal, and the following relevant kexts are loaded:

• com.apple.kext.ATISupport (7.1.2) <81 9 8 7 5 4 3 1>
• com.apple.kext.ATI6000Controller (7.1.2) <82 81 9 8 5 4 3 1>
• com.apple.ATIRadeonX3000 (7.1.2) <84 81 9 7 6 5 4 3 1>
• com.apple.kext.ATIFramebuffer (7.1.2) <82 81 9 8 7 5 4 3 1>
• org.slice.RadeonMonitor (1.0.0d1) <13 9 4 3>
• com.apple.iokit.IOGraphicsFamily (2.3.2) <9 7 5 4 3>
• com.apple.driver.AppleGraphicsControl (3.0.16) <84 81 9 8 7 5 4 3 1>
• com.apple.driver.AppleIntelSNBGraphicsFB (7.1.2) <81 9 8 7 6 5 4 3 1>

I don't think my graphics card is bad, because everything works fine until the OS takes over things.

I've been at this for days. What the hell am I missing?