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On some SB800 systems polarity for IOAPIC pin2 is wrongly specified as low active by BIOS. This caused system hangs after resume from S3 when HPET was used in one-shot mode on such systems because a timer interrupt was missed (HPET signal is high active). For more details see: http://marc.info/?l=linux-kernel&m=129623757413868 Tested-by: Manoj Iyer <manoj.iyer@canonical.com> Tested-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Cc: Borislav Petkov <borislav.petkov@amd.com> Cc: stable@kernel.org # 37.x, 32.x LKML-Reference: <20110224145346.GD3658@alberich.amd.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>