[Bug 28267] no video on imac 27 (regression)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=28267

--- Comment #7 from Alex Deucher <agd5f at yahoo.com> 2010-07-12 08:38:36 PDT ---
Can you dump the regs from a working setup (bios/vesa/fglrx) using avivotool?

You can get avivotool here:
http://cgit.freedesktop.org/~airlied/radeontool/
Also, please apply this patch to avivotool:
https://bugs.freedesktop.org/attachment.cgi?id=34810

To dump the regs, make sure the monitor is on and working, and then dump the
regs:
avivotool regs all > working.dump
For comparison, dump the regs using the non-working radeon driver:
avivotool regs all > broken.dump
Note that you must be root to use avivotool.  Also try to use the same mode
(e.g., 2560x1440) with both dumps if possible.

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