[Bug 26398] radeon x3450 xrandr dual dvi blank screen

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=26398





--- Comment #24 from Loïc Lefort <loic.lefort at neofelis.fr>  2010-02-23 12:34:23 PST ---
(In reply to comment #23)
> Can you boot up with only the problematic monitor attached and then dump the
> registers using the vesa driver (assuming the head lights up ok), and then
> using the radeon driver.

It's not a problematic monitor, both monitors work fine when plugged on dvi-0
and in dualhead on a x1650. It's always the monitor plugged on dvi-1 that stays
blank, even if I swap them.
Anyway, I did some register dumps :
- using vesa then radeon with both monitors plugged
- using vesa then radeon with the monitor on dvi-0 unplugged.
I did reboot between both tests, but not between the vesa/radeon driver switch.
Using vesa, both heads display something, but it's all mangled. Using radeon,
dvi-0 is fine, and dvi-1 stays blank.


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