Mailinglist Archive: opensuse-bugs (2150 mails)

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[Bug 867499] Cannot enable second radeon card, although it is recognized.

--- Comment #5 from Tyler Kay <Tyler_Kdog@xxxxxxxxx> 2014-04-02 15:08:19 UTC ---
As I noted in the openSUSE forums yesterday, I tested with the latest package
updates (kernel 3.14, X, etc ) and proper functionality has been restored (i.e.
you can once again achieve a large contiguous desktop using a non-PX radeon +
radeon system).

As I applied the updates en masse, I certainly could not pinpoint what resolved
the issue. A glance at the server's change log revealed nothing related to
randr (though, in relation to commentary in this thread, I do note that the in
server glamor changes, discussed just above, are indeed documented).

At that point, I suspected that it was probably a change to the kernel driver,
and was going to leave it at that. However, curiosity got the better of me,
and, upon checking the drm updates applied to kernel 3.14, we do indeed find

Which looks strongly to me to be the winner/solution/explanation.

Users of other adapters (ex. nouveau, intel) should check to see if similar
runtime PM logic has been adopted in the respective DRM/kernel driver.

Alex no longer owes me a beer.

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