[Bug 15708] VGA-0 can't be activated using xrandr, even though it is properly detected by xrandr -q

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=15708





--- Comment #20 from Fabian Kneißl <fabian at kneissl-web.net>  2008-06-18 17:20:27 PST ---
Created an attachment (id=17220)
 --> (http://bugs.freedesktop.org/attachment.cgi?id=17220)
Fixes this problem, but it would probably break other radeon cards

Thanks for motivating me to find a solution and providing me with a howto to
use the bisect tool, really nice tool btw. :)

Wow, took me quite some time tracking the problem down (although using git
bisect). First, bisect took me to another revision:
30cab1dbebb7bdb925f2fe9f91b84183312bbbfd
Applying the reverse patch did not fix it for me in HEAD revision.

Thus, tracking down the bug a second time. This time using the reverse patch
from this revision.
Then bisect took me to 000741e250e54122b0adc91694eb4bfa320a70fb which is a huge
diff with much radeon clean up. One line caught my eye: "IsIGP". And with the
appended little patch, my external monitor works straight ahead.

Probably removing these two lines is not optimal for all users (IMHO). Thus it
would be great if you could find a workaround that does not break it for all
users. I will test again ;)


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