[xorg-bugzilla-noise] [Bug 843] New: PCI bus and mga BIOS patch (from Ivan Kokshaysky)

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http://freedesktop.org/bugzilla/show_bug.cgi?id=843   
   
           Summary: PCI bus and mga BIOS patch (from Ivan Kokshaysky)
           Product: xorg
           Version: CVS_head
          Platform: PC
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P2
         Component: Driver/mga
        AssignedTo: xorg-bugzilla-noise at freedesktop.org
        ReportedBy: mharris at www.linux.org.uk
                CC: eich at pdx.freedesktop.org


Problems:

- Detection of the primary adapter is broken. You have to
  set explicit PCI id in XF86Config to get the card detected
  as *secondary*. However, switching to VGA text console won't work then
  (most drivers don't save/restore VGA state for secondary adapters).

- Rather old bug in mga driver (since 4.1.0, IIRC) - the driver
  attempts to read the video ROM *before* enabling it. Naturally,
  this causes annoying machine check on certain platforms.

Full details of bug and original patch submission are in Red Hat bugzilla:
        https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=91711


I've updated the patch to cleanly apply to X.Org CVS, attached below.   
   
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