Using 2.6.20-9-generic SMP on Feisty. Without a CD in the drive, there are hangs and the dmesg messages are almost exactly the same chantra has reported:
[ 9575.732000] ata1.01: cmd a0/01:00:00:00:00/00:00:00:00:00/b0 tag 0 cdb 0x25 data 8 in [ 9575.732000] res 50/00:00:00:00:00/00:00:00:00:00/b0 Emask 0x2 (HSM violation) [ 9575.732000] ata1: soft resetting port [ 9576.084000] ata1.00: configured for UDMA/100 [ 9576.264000] ata1.01: configured for UDMA/33 [ 9576.264000] ata1: EH complete [ 9576.280000] SCSI device sda: 234441648 512-byte hdwr sectors (120034 MB) [ 9576.296000] sda: Write Protect is off [ 9576.296000] sda: Mode Sense: 00 3a 00 00 [ 9576.304000] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA [ 9576.336000] SCSI device sda: 234441648 512-byte hdwr sectors (120034 MB) [ 9576.340000] sda: Write Protect is off [ 9576.340000] sda: Mode Sense: 00 3a 00 00 [ 9576.340000] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA [10195.476000] ipw3945: association process canceled [10531.292000] ata1.01: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen [10531.292000] ata1.01: cmd a0/01:00:00:00:00/00:00:00:00:00/b0 tag 0 cdb 0x43 data 12 in [10531.292000] res 40/00:03:00:00:00/00:00:00:00:00/b0 Emask 0x4 (timeout) [10538.292000] ata1: port is slow to respond, please be patient (Status 0xd0) [10561.308000] ata1: port failed to respond (30 secs, Status 0xd0) [10561.308000] ata1: soft resetting port [10561.660000] ata1.00: configured for UDMA/100 [10561.848000] ata1.01: configured for UDMA/33 [10561.848000] ata1: EH complete [10561.864000] SCSI device sda: 234441648 512-byte hdwr sectors (120034 MB) [10561.872000] sda: Write Protect is off [10561.872000] sda: Mode Sense: 00 3a 00 00 [10561.888000] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA [10561.912000] SCSI device sda: 234441648 512-byte hdwr sectors (120034 MB) [10561.912000] sda: Write Protect is off [10561.912000] sda: Mode Sense: 00 3a 00 00 [10562.288000] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA I had a few more errors of the "timeout" kind after this one, and they all corresponded to hangs. They seemed to happen very frequently, like every 20 minutes or less. I did not get any other "HSM violation" errors. The good part: With a CD in the drive, the computer works perfectly. No hangs, no dmesg messages, all good and well. -- ata_piix problem with Intel ICH7 chipset https://launchpad.net/bugs/53754 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs