I have a Sandy Bridge laptop with an SSD (Intel G2). On startup and resume, I get a ten-second delay or so, COMRESET failed, and then the disk comes up. On Windows, or in compatibility mode, or with libahci.skip_host_reset=1, the disk comes up instantly. I have a similar problem on a Q67 desktop machine with a different brand SSD. One of these systems has ATA security enabled, and the other does not. I have this problem on 2.6.38 and 2.6.39, and I'd be happy to test patches or other things. good: [ 0.662024] ahci 0000:00:1f.2: version 3.0 [ 0.662035] ahci 0000:00:1f.2: PCI INT B -> GSI 19 (level, low) -> IRQ 19 [ 0.662091] ahci 0000:00:1f.2: irq 42 for MSI/MSI-X [ 0.662119] ahci: SSS flag set, parallel bus scan disabled [ 0.662128] ahci 0000:00:1f.2: skipping global host reset [ 0.664096] ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 6 ports 6 Gbps 0x13 impl SATA mode [ 0.664105] ahci 0000:00:1f.2: flags: 64bit ncq sntf ilck stag pm led clo pio slum part ems sxs apst [ 0.664117] ahci 0000:00:1f.2: setting latency timer to 64 [ 0.668557] scsi0 : ahci [ 0.668630] scsi1 : ahci [ 0.668687] scsi2 : ahci [ 0.668741] scsi3 : ahci [ 0.668797] scsi4 : ahci [ 0.668852] scsi5 : ahci [ 0.669236] ata1: SATA max UDMA/133 abar m2048@0x92628000 port 0x92628100 irq 42 [ 0.669239] ata2: SATA max UDMA/133 abar m2048@0x92628000 port 0x92628180 irq 42 [ 0.669241] ata3: DUMMY [ 0.669241] ata4: DUMMY [ 0.669244] ata5: SATA max UDMA/133 abar m2048@0x92628000 port 0x92628300 irq 42 [ 0.669245] ata6: DUMMY ... [ 0.975730] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 0.976165] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded [ 0.976168] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out [ 0.976171] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out [ 0.976510] ata1.00: ATA-7: INTEL SSDSA2M160G2GC, 2CV102HA, max UDMA/133 [ 0.976520] ata1.00: 312581808 sectors, multi 16: LBA48 NCQ (depth 31/32) [ 0.977032] ata1.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded [ 0.977036] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out [ 0.977038] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out [ 0.977323] ata1.00: configured for UDMA/133 [ 0.977470] scsi 0:0:0:0: Direct-Access ATA INTEL SSDSA2M160 2CV1 PQ: 0 ANSI: 5 [ 0.977597] sd 0:0:0:0: Attached scsi generic sg0 type 0 [ 0.977709] sd 0:0:0:0: [sda] 312581808 512-byte logical blocks: (160 GB/149 GiB) [ 0.977809] sd 0:0:0:0: [sda] Write Protect is off [ 0.977811] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 [ 0.977841] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 0.978060] sda: detected capacity change from 0 to 160041885696 [ 0.978323] sda: sda1 sda2 sda3 [ 0.978628] sd 0:0:0:0: [sda] Attached SCSI disk bad: [ 0.696979] ahci 0000:00:1f.2: PCI INT B -> GSI 19 (level, low) -> IRQ 19 [ 0.697146] ahci: SSS flag set, parallel bus scan disabled [ 0.708221] ahci 0000:00:1f.2: AHCI 0001.0300 32 slots 6 ports 6 Gbps 0x13 impl SATA mode [ 0.708403] ahci 0000:00:1f.2: flags: 64bit ncq sntf ilck stag pm led clo pio slum part ems sxs apst [ 0.712672] scsi0 : ahci [ 0.712833] scsi1 : ahci [ 0.712980] scsi2 : ahci [ 0.713127] scsi3 : ahci [ 0.713286] scsi4 : ahci [ 0.713432] scsi5 : ahci [ 0.713892] ata1: SATA max UDMA/133 abar m2048@0x92628000 port 0x92628100 irq 42 [ 0.714038] ata2: SATA max UDMA/133 abar m2048@0x92628000 port 0x92628180 irq 42 [ 0.714197] ata3: DUMMY [ 0.714287] ata4: DUMMY [ 0.714377] ata5: SATA max UDMA/133 abar m2048@0x92628000 port 0x92628300 irq 42 [ 0.714523] ata6: DUMMY ... [ 6.079327] ata1: link is slow to respond, please be patient (ready=0) [ 10.714326] ata1: COMRESET failed (errno=-16) [ 11.018951] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300) [ 11.020746] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out [ 11.020897] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out [ 11.021272] ata1.00: ATA-7: INTEL SSDSA2M160G2GC, 2CV102HA, max UDMA/133 [ 11.021409] ata1.00: 312581808 sectors, multi 16: LBA48 NCQ (depth 31/32) [ 11.021914] ata1.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out [ 11.022061] ata1.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out [ 11.022434] ata1.00: configured for UDMA/133 [ 11.022671] scsi 0:0:0:0: Direct-Access ATA INTEL SSDSA2M160 2CV1 PQ: 0 ANSI: 5 [ 11.022958] sd 0:0:0:0: Attached scsi generic sg0 type 0 [ 11.023030] sd 0:0:0:0: [sda] 312581808 512-byte logical blocks: (160 GB/149 GiB) [ 11.023116] sd 0:0:0:0: [sda] Write Protect is off [ 11.023144] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 11.023338] sda: detected capacity change from 0 to 160041885696 [ 11.023560] sda: sda1 sda2 sda3 [ 11.023897] sd 0:0:0:0: [sda] Attached SCSI disk [ 11.327544] ata2: SATA link down (SStatus 0 SControl 300) [ 11.632156] ata5: SATA link down (SStatus 0 SControl 300) -- 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
