Rafael J. Wysocki wrote: > [Adding CCs.] > > On Tuesday, 1 of July 2008, Mathieu Bérard wrote: >> Hi, >> I have a laptop with an ICH6M SATA Controller and a Hitachi hard drive. >> While it worked well using the ahci module and Linux 2.6.25, >> it get randomly 'stuck' for several seconds to several minutes with 2.6.26-rc8. >> Successive errors progressively reduce the ATA link speed. >> >> Passing the libata.noacpi parameter is an effective workaround. >> >> Please note that it's not the first time i have this kind of issue, see: >> http://marc.info/?l=linux-ide&m=117305595312399&w=2 >> This was found to be a bad interaction between my _GTF taskfile, which enable the >> "Enable Device-Initiated Interface Power State Transitions" feature, and NCQ. >> The driver was later NCQ blacklisted to correct the problem. Can you please post the result of "hdparm -I /dev/sda" and full kernel boot log? 0xca is not a NCQ command so the it's not related to NCQ at all. It seems we'll need to filter out DIPM commands from _GTF. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
