[Bug 36003] [Radeon HD 5650 and 5470] Driver crash during recovery boot and in normal boot (Regression from 2.6.38-3 to -4)

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Apr 7 19:07:45 PDT 2011


--- Comment #10 from Alex Deucher <agd5f at yahoo.com> 2011-04-07 19:07:45 PDT ---
It's not a bad interaction between i915 and radeon per se.  The switcheroo code
needs more work to switch properly on some systems it seems.  There are a set
acpi methods required to activate/deactivate the respective gpus.  The drivers
need to load and initialize active hw.  If the hw is not active when the driver
loads, then the hw is not set up properly and it won't work.  Probably some
ordering issues in how the switcheroo acpi methods are called.

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