Comment 28 for bug 806032

I have succeeded (with some trepidation) in installing and booting from kernel 3.2.0.27-43 (in Quantal). Most of the boot errors have gone, just leaving:

Aug 6 09:12:03 tigger kernel: [ 3.071520] ACPI Error: [_T_0] Namespace lookup failure, AE_ALREADY_EXISTS (20110623/dswload2-316)
Aug 6 09:12:03 tigger kernel: [ 3.071525] ACPI Exception: AE_ALREADY_EXISTS, During name lookup/catalog (20110623/psloop-231)
Aug 6 09:12:03 tigger kernel: [ 3.071528] ACPI Error: Method parse/execution failed [\_SB_.AC__.ADJP] (Node f742d120), AE_ALREADY_EXISTS (20110623/psparse-536)
Aug 6 09:12:03 tigger kernel: [ 3.071533] ACPI Error: Method parse/execution failed [\_SB_.AC__._PSR] (Node f742d0f0), AE_ALREADY_EXISTS (20110623/psparse-536)
Aug 6 09:12:03 tigger kernel: [ 3.071538] ACPI Exception: AE_ALREADY_EXISTS, Error reading AC Adapter state (20110623/ac-118)
Aug 6 09:12:03 tigger kernel: [ 3.093674] ACPI: Marking method ADJP as Serialized because of AE_ALREADY_EXISTS error
Aug 6 09:12:03 tigger kernel: [ 3.109426] ACPI: Marking method _PSR as Serialized because of AE_ALREADY_EXISTS error

However running cadl_brightness_hack I still get
dd: writing `/dev/mem': Bad address
with $addr 3660685688