HELP - Gigabyte Radeon HD 6450

[Bobcat86]

Just installed Gigabyte Radeon HD 6450 under 10.7.4.

Here's more details:
Z86A-D3H-B3 rev 1.3, F11 BIOS
i5-2500K
8GB Corsair Vengeance
120GB OCZ Agility 3 SSD
TP-Link TL-WDN4800 WiFi
Framebuffer is Pithecia

I have a second hidden ghost screen, despite I only have one monitor attached.

Has anyone encountered this issue ? I don't seem to be able to kill that second screen...

My mouse disappears in the smaller hidden screen area, as if my desktop was extended, but I don't have such a monitor...

See attached screen shots !

Does anyone have any input on how to fix ?

Thank you in advance !

 

[Bobcat86]

Does anyone have input on how to get rid of second screen ?

 

[watercoke]

Hi!

I have a Radeon 4670 and I also had a "second hidden ghost screen".
In my case that second screen appears only when the generic RadeonFrameBuffer is loaded. After setting PCIRootUID=0 (I was using PCIRootUID=1 previously) in chimera, now the correct "Flicker" framebuffer is loaded and no second ghost screen appears. I have GraphicsEnabler=Yes.

I suspect the problem can be related to an incorrect vga configuration when using the default RadeonFrameBuffer. I was trying to find the connector info table for the generic RadeonFrameBuffer (just googling), but I failed. Maybe the connector info, and/or any other relevant data, is automatically deduced by the system from vga bios and causes our second ghost screen to appear (an unsupported/unknown or bad vga bios maybe?).

Are you sure your Pithecia framebuffer is being loaded and not the generic RadeonFrameBuffer? (run "ioreg | grep ATY" in terminal to see loaded framebuffer)
In case your Pithecia framebuffer is being loaded, did you tried editing Pithecia personality and changing the connectors config?
You can read this http://www.insanely-mac.com/forum/index.php?showtopic=249642, this http://www.insanely-mac.com/forum/index.php?showtopic=252061 and http://www.botchco.com/agd5f/?p=51 as an introduction to framebuffer personalities.