Comment 8 for bug 84603

Some here on feisty after upgrading to latest Kernel 2.6.20-13-generic:

[ 5249.792000] SCSI device sda: 156301488 512-byte hdwr sectors (80026 MB)
[ 5249.792000] sda: Write Protect is off
[ 5249.792000] sda: Mode Sense: 00 3a 00 00
[ 5249.792000] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 5519.372000] ata1.01: qc timeout (cmd 0xa0)
[ 5519.372000] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
[ 5519.372000] ata1.01: cmd a0/00:00:00:00:20/00:00:00:00:00/b0 tag 0 cdb 0x0 data 0
[ 5519.372000] res 51/20:03:00:00:00/00:00:00:00:00/b0 Emask 0x5 (timeout)
[ 5526.372000] ata1: port is slow to respond, please be patient (Status 0xd1)
[ 5549.388000] ata1: port failed to respond (30 secs, Status 0xd1)
[ 5549.388000] ata1: soft resetting port
[ 5549.740000] ata1.00: configured for UDMA/33
[ 5549.920000] ata1.01: configured for UDMA/33
[ 5549.920000] ata1: EH complete