[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. > > > Device detection: > > [ 0.567684] ahci 0000:00:1f.2: version 3.0 > [ 1.568027] ahci 0000:00:1f.2: AHCI 0001.0000 32 slots 4 ports 1.5 Gbps 0x5 impl IDE mode > [ 1.568091] ahci 0000:00:1f.2: flags: 64bit ncq pm led slum part > [ 1.568695] ata1: SATA max UDMA/133 abar m1024@0xb8000c00 port 0xb8000d00 irq 19 > [ 1.873016] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) > [ 1.874045] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 succeeded > [ 1.875000] ata1.00: ATA-7: HTS541010G9SA00, MBZOC60D, max UDMA/100 > [ 1.875000] ata1.00: 195371568 sectors, multi 0: LBA48 NCQ (not used) > [ 1.875000] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 succeeded > [ 1.875000] ata1.00: configured for UDMA/100 > > Typical error: > > [ 499.178040] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen > [ 499.178105] ata1.00: cmd ca/00:3e:76:45:81/00:00:00:00:00/e1 tag 0 dma 31744 out > [ 499.178106] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout) > [ 499.178168] ata1.00: status: { DRDY } > [ 499.178220] ata1: hard resetting link > [ 499.942034] ata1: SATA link up 1.5 Gbps (SStatus 113 SControl 300) > [ 499.943540] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 succeeded > [ 499.946056] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 succeeded > [ 499.947174] ata1.00: configured for UDMA/100 > [ 499.947174] ata1: EH complete > > Full dmesg is attached. > -- "Premature optimization is the root of all evil." - Donald Knuth -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
