On Tue, Apr 3, 2012 at 3:58 PM, Jonathan Nieder <jrnieder@xxxxxxxxx> wrote: > Hi Greg, > > Josh Boyer wrote: >> On Fri, Mar 30, 2012 at 6:13 AM, Len Brown <lenb@xxxxxxxxxx> wrote: > >>> From: Julian Anastasov <ja@xxxxxx> >>> >>> commit 64b3db22c04586997ab4be46dd5a5b99f8a2d390 (2.6.39), >>> "Remove use of unreliable FADT revision field" causes regression >>> for old P4 systems because now cst_control and other fields are >>> not reset to 0. > [...] >>> The fix is to update acpi_gbl_FADT.header.length after >>> the original value is used to check for old revisions. >>> >>> https://bugzilla.kernel.org/show_bug.cgi?id=42700 >>> https://bugzilla.redhat.com/show_bug.cgi?id=727865 >>> >>> Signed-off-by: Julian Anastasov <ja@xxxxxx> >>> Acked-by: Bob Moore <robert.moore@xxxxxxxxx> >>> Signed-off-by: Len Brown <len.brown@xxxxxxxxx> >> >> This one should go into the stable trees. > > Please apply > > 3e80acd1af40 "ACPICA: Fix regression in FADT revision checks" > > which is in linus's master to the 3.0.y, 3.2.y, and 3.3.y series to > fix this old boot problem. (Many affected people disabled HT in the > BIOS to work around it in the meantime.) > > WZab (cc-ed) has tested that the patch addresses the problem when > applied to the 3.2.y and 3.3.y branches. [1] has details. We've had this applied in Fedora on 3.2 and 3.3 for a while now as well. josh _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linuxfoundation.org/mailman/listinfo/linux-pm
