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Maneesh

Dual display with ATI HD 4870

Question

I have difficulty getting the dual display working with ATI HD4870 when booting with Clover boot loader. But when i boot with the Chameleon ..the display card is recognised as ATI Radeon HD 4800 and both display works.?

?

Appreciate help with getting the dual display working with Clover

?

1st screen - Dell S2409W ( 1920 x 1080)

2nd Screen - Sony 32?? ?(1360 x 768)?

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11 answers to this question

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On 7/8/2017 at 6:06 AM, dexter96 said:

can you give me tutor to enable hd 4870 ? my hd 4870 no signal at boot.

Hi,

 

If you have no signal at boot, it may indicate that a different or patched framebuffer is required.

 

Depending on what bootloader you're using, the invocation of a different framebuffer differs:

  • Chameleon/Enoch/Chimera
AtiConfig=framebuffer
<key>Graphics</key>
<dict>
	<key>FBName</key>
	<string>framebuffer</string>
</dict>

I would recommend trying the Radeon framebuffer first.  If that doesn't work, then it is likely you will have to take the patch route.

noname likes this

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Posted (edited)

Ive been succes with my vga cable, but in adobe illustrator its very slow when i draging mouse to pick a color, now i edited agpm but isn't help. try with dvi-i converter cable, my screen is blank after success boot, i try fbname in clover for cardinal, motmot, radeon but not help, btw only motmot fb name worked for me when using vga cable, dvi-i not work. sorry for bad english.. i'm Indonesian.. thx reply..

Edited by dexter96

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On 7/14/2017 at 7:54 AM, dexter96 said:

in adobe illustrator its very slow when i draging mouse to pick a color

Sounds to me like graphics acceleration isn't fully working.

 

On 7/14/2017 at 7:54 AM, dexter96 said:

try with dvi-i converter cable, my screen is blank after success boot

If this happens with any of the framebuffers you've tried, then you'll likely need to make your own patched one.  I linked a tutorial on how to do that farther up in the thread.

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So, is there a way how to full enable?

ok, in the tutor to patch framebuffer its need xcode, i dont have and wont download, can i patch without xcode installed?

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