[Bug 27322] [HD 4850] New Apple iMac (Core i5) fails to boot with KMS (Black screen)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27322

--- Comment #10 from Alex Deucher <agd5f at yahoo.com> 2010-06-21 11:58:16 PDT ---
(In reply to comment #8)
> Created an attachment (id=35659)
 View: https://bugs.freedesktop.org/attachment.cgi?id=35659
 Review: https://bugs.freedesktop.org/review?bug=27322&attachment=35659

> Xorg.0.log when the patch is in use
> 
> I'm still having this problem using kernel version 2.6.33.3-85.fc13.x86_64 on
> my iMac 27" / HD 4850. This kernel supposedly has the patch from Comment 6 in
> it.
> 
> When using the default radeon driver, the screen turns black as soon as X
> starts. (I'm not having these problems when using the vesa and fglrx drivers.)
> 
> Attached is my xorg log as it was a few seconds after the screen turning blank.

According to your log this log you are not using kms. Looks like you are seeing
bug 28267.

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