[Bug 14597] New: randr12 failures on 12" powerbooks, and workarounds

[bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org]

http://bugs.freedesktop.org/show_bug.cgi?id=14597

           Summary: randr12 failures on 12" powerbooks, and workarounds
           Product: xorg
           Version: git
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/nouveau
        AssignedTo: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
        ReportedBy: obiwan-ajv+KCCKUOlAfugRpC6u6w@public.gmane.org
         QAContact: xorg-team-go0+a7rfsptAfugRpC6u6w@public.gmane.org


As has been reported several times on irc in the past (dating back to december
at least), randr12 is still not working on powerbooks. I decided to have a good
look at it and tried to find the issues by comparing registers in the randr and
non-randr state.

OpenFirmware posts the card and by default sets up a 1024x768 mode, only 8 bit
color however. For some reason, powerbooks have the internal LVDS on CRTC1.
When plugging an exernal analog TFT screen, it flashes white during OF init,
but stays black after that. randr2 was able to correctly recognize it. The
problem seemed only to happen with the internal LVDS.

Post of BIOS image, Xorg log, reg traces and initial patch follow.

Danny


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