Also getting the same problem on my laptop...
sudo dmesg | grep ata
[ 0.000000] BIOS-e820: 000000003f7d0000 - 000000003f7de000 (ACPI data)
[ 0.000000] #0 [0000000000 - 0000001000] BIOS data page ==> [0000000000
- 0000001000]
[ 0.000000] PERCPU: Allocating 41628 bytes of per cpu data
[ 0.004000] Memory: 1016552k/1040192k available (2572k kernel code, 22940k
reserved, 1160k data, 424k init, 122688k highmem)
[ 0.004000] .data : 0xc03832aa - 0xc04a5680 (1160 kB)
[ 0.567314] ACPI: EC: GPE = 0x1d, I/O: command/status = 0x66, data = 0x62
[ 2.005137] Write protecting the kernel read-only data: 936k
[ 3.527615] libata version 3.00 loaded.
[ 4.070269] pata_acpi 0000:00:1f.2: PCI INT B -> GSI 19 (level, low) -> IRQ
19
[ 4.070306] pata_acpi 0000:00:1f.2: setting latency timer to 64
[ 4.070323] pata_acpi 0000:00:1f.2: PCI INT B disabled
[ 4.082955] ata_piix 0000:00:1f.2: version 2.12
[ 4.082971] ata_piix 0000:00:1f.2: PCI INT B -> GSI 19 (level, low) -> IRQ 19
[ 4.082977] ata_piix 0000:00:1f.2: MAP [ P0 P2 IDE IDE ]
[ 4.083026] ata_piix 0000:00:1f.2: setting latency timer to 64
[ 4.083737] scsi0 : ata_piix
[ 4.083885] scsi1 : ata_piix
[ 4.086264] ata1: SATA max UDMA/133 cmd 0x1f0 ctl 0x3f6 bmdma 0xffa0 irq 14
[ 4.086269] ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xffa8 irq 15
[ 4.248415] ata1.00: ATA-7: FUJITSU MHV2060BH PL, 00000029, max UDMA/100
[ 4.248421] ata1.00: 117210240 sectors, multi 16: LBA48 NCQ (depth 0/32)
[ 4.264409] ata1.00: configured for UDMA/100
[ 4.444392] ata2.00: ATAPI: TSSTcorpCD/DVDW TS-L632D, TIR0, max UDMA/33
[ 4.476307] ata2.00: configured for UDMA/33
[ 4.989627] EXT3-fs: mounted filesystem with ordered data mode.
[ 20.055083] EXT3-fs: mounted filesystem with ordered data mode.
[ 119.988059] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[ 119.988077] ata2.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
[ 119.988086] ata2.00: status: { DRDY }
[ 125.028044] ata2: link is slow to respond, please be patient (ready=0)
[ 130.020029] ata2: device not ready (errno=-16), forcing hardreset
[ 130.020045] ata2: soft resetting link
[ 130.232355] ata2.00: configured for UDMA/33
[ 130.232383] ata2: EH complete
[ 268.908069] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[ 268.908088] ata2.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
[ 268.908097] ata2.00: status: { DRDY }
[ 273.948028] ata2: link is slow to respond, please be patient (ready=0)
[ 278.932029] ata2: device not ready (errno=-16), forcing hardreset
[ 278.932045] ata2: soft resetting link
[ 279.144338] ata2.00: configured for UDMA/33
[ 279.144361] ata2: EH complete
[ 552.932174] ata2.00: qc timeout (cmd 0xa0)
[ 552.932195] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[ 552.932207] ata2.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
[ 552.932216] ata2.00: status: { DRDY ERR }
[ 557.972030] ata2: link is slow to respond, please be patient (ready=0)
[ 562.956030] ata2: device not ready (errno=-16), forcing hardreset
[ 562.956048] ata2: soft resetting link
[ 563.168327] ata2.00: configured for UDMA/33
[ 563.168358] ata2: EH complete
[ 580.932194] ata2.00: qc timeout (cmd 0xa0)
[ 580.932214] ata2.00: limiting speed to UDMA/25:PIO4
[ 580.932220] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[ 580.932233] ata2.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
[ 580.932241] ata2.00: status: { DRDY ERR }
[ 585.972031] ata2: link is slow to respond, please be patient (ready=0)
[ 590.956030] ata2: device not ready (errno=-16), forcing hardreset
[ 590.956047] ata2: soft resetting link
[ 591.168338] ata2.00: configured for UDMA/25
[ 591.168371] ata2: EH complete
[ 633.908082] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[ 633.908102] ata2.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
[ 633.908111] ata2.00: status: { DRDY }
[ 638.952058] ata2: link is slow to respond, please be patient (ready=0)
[ 643.936058] ata2: device not ready (errno=-16), forcing hardreset
[ 643.936075] ata2: soft resetting link
[ 644.148380] ata2.00: configured for UDMA/25
[ 644.148407] ata2: EH complete
[ 697.968166] ata2.00: qc timeout (cmd 0xa0)
[ 697.968186] ata2.00: limiting speed to PIO4
[ 697.968191] ata2.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x6 frozen
[ 697.968203] ata2.00: cmd a0/00:00:00:00:00/00:00:00:00:00/a0 tag 0
[ 697.968212] ata2.00: status: { DRDY ERR }
[ 703.008028] ata2: link is slow to respond, please be patient (ready=0)
[ 707.992030] ata2: device not ready (errno=-16), forcing hardreset
[ 707.992047] ata2: soft resetting link
[ 708.204330] ata2.00: configured for PIO4
[ 708.204366] ata2: EH complete
--
DMA and UDMA issues with intrepid
https://bugs.launchpad.net/bugs/292142
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