[Bug 36823] New: Firmware Bug: ACPI No _BCQ method

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=36823

           Summary: Firmware Bug: ACPI No _BCQ method
           Product: xorg
           Version: unspecified
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
        AssignedTo: xorg-driver-ati at lists.x.org
        ReportedBy: manday at gmx.net
         QAContact: xorg-team at lists.x.org


Radeon Device aa68 Graphics card (Cedar). Used in hybrid graphics with Intel
i915 vgaswitcheroo, hence both are compiled in (Bug #36783 [1]) and KMS enabled
(without KMS the problem usually not occurs). On boot, the screen tunrs of the
backlight by itsself and has to be turned on manually[2]. A message in dmesg
that is likely to be related says

Firmware Bug: ACPI: No _BCQ method

THe log has several errors related to the radeon. Kernel is 39-rc5.

[1] https://bugs.freedesktop.org/show_bug.cgi?id=36783
[2] http://forums.gentoo.org/viewtopic-t-874961.html

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