[Bug 39282] radeon HD6790 (barts) card produces black+white horizontal stripes on screen when launching Xorg

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=39282

--- Comment #58 from Tomasz <tmciolek at gmail.com> 2012-05-26 03:14:04 UTC ---
(In reply to comment #51)
> Created attachment 62030 [details] [review]
> possible fix
> 
> another patch to try.

This patch was tier with kernel 3.4.0 

When system is booting, and going into KMS on radeon driver no output on the
screen (backlight goes to full power and screen is blank)

No kernel .log available. machine locks up hard, and need to be power-cycled

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