[Bug 25607] drmCheckModesettingSupported fails if X loaded radeon modeset=1 just before

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=25607

Alex Deucher <agd5f at yahoo.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|REOPENED                    |RESOLVED
         Resolution|                            |WONTFIX

--- Comment #5 from Alex Deucher <agd5f at yahoo.com> 2012-07-28 21:18:24 PDT ---
As of 6.14.3 the ddx will stop loading if the ddx is in UMS mode and the drm is
in KMS mode to prevent display problems.  UMS is no longer supported in the DDX
on Linux.  Support for UMS was removed in xf86-video-ati git last month.  UMS
only supported chips up through evergreen and the open source 3D drivers
dropped UMS support a while ago.

The open source radeon driver and fglrx are completely different driver stacks
and require some system adjustments to switch between then (different kernel
modules, different ddx, different 3D drivers, different libgl and libglx,
etc.).  It's probably easiest to have a script to switch the environments
between the two drivers or something like that.

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