[Bug 20922] New: ata2: command error, drv_stat 0x51 host_stat 0x0

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http://bugzilla.ubuntu.com/show_bug.cgi?id=20922
Ubuntu | kernel-package

           Summary: ata2: command error, drv_stat 0x51 host_stat 0x0
           Product: Ubuntu
           Version: unspecified
          Platform: i386
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: kernel-package
        AssignedTo: ben.collins at ubuntu.com
        ReportedBy: djst.mozilla at gmail.com
         QAContact: kernel-bugs at lists.ubuntu.com


In virtual terminal 1 (Ctrl+Alt+F1), these lines are repeatedly outputted, at
roughly every second:

[17179599.908000] ata2: command error, drv_stat 0x51 host_stat 0x0
[17179599.908000] ata2: translated ATA stat/err 0x51/54 to SCSI SK/ASC/ASCQ
0xb/00/00
[17179599.924000] ata2: command error, drv_stat 0x51 host_stat 0x0
[17179599.924000] ata2: translated ATA stat/err 0x51/54 to SCSI SK/ASC/ASCQ
0xb/00/00
[17179599.944000] ata2: command error, drv_stat 0x51 host_stat 0x0
[17179599.944000] ata2: translated ATA stat/err 0x51/54 to SCSI SK/ASC/ASCQ
0xb/00/00
[17179599.944000] sr0: CDROM (ioctl) error, command: <6>Test Unit Ready 00 00 00
00 00 00

Also, performance is very slow for graphics rendering, application start
animation, etc. I think it's related to the above error messages. Not sure about
which package to choose though.

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