Comment 32 for bug 104581

Kubuntu Feisty Fawn
kernel 2.6.20-16-generic

I believe the problem is occuring with my SATA hard drive, which is a Samsung SP0812C. It stops responding quite often. It seems that most people that are having this problem are fixing it with 'piix', but I have a VIA chipset rather than an Intel one. I will attach some logs below. Relevant dmesg lines:

[ 2416.505383] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
[ 2416.505394] ata1.00: cmd c8/00:90:e6:54:5b/00:00:00:00:00/e2 tag 0 cdb 0x0 data 73728 in
[ 2416.505396] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 2416.505414] ata1: soft resetting port
[ 2416.671775] ATA: abnormal status 0x7F on port 0x0001e007
[ 2416.682280] ATA: abnormal status 0x7F on port 0x0001e007
[ 2416.693332] ata1.00: ata_hpa_resize 1: sectors = 156368016, hpa_sectors = 156368016
[ 2416.705299] ata1.00: ata_hpa_resize 1: sectors = 156368016, hpa_sectors = 156368016
[ 2416.705303] ata1.00: configured for UDMA/100
[ 2416.705314] ata1: EH complete
[ 2416.727567] SCSI device sda: 156368016 512-byte hdwr sectors (80060 MB)
[ 2416.727651] sda: Write Protect is off
[ 2416.727653] sda: Mode Sense: 00 3a 00 00
[ 2416.741889] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 2446.704938] ata1.00: limiting speed to UDMA/33:PIO4
[ 2446.704945] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
[ 2446.704953] ata1.00: cmd c8/00:88:e6:7d:5d/00:00:00:00:00/e1 tag 0 cdb 0x0 data 69632 in
[ 2446.704955] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 2453.697731] ata1: port is slow to respond, please be patient (Status 0xd0)
[ 2476.684824] ata1: port failed to respond (30 secs, Status 0xd0)
[ 2476.684831] ata1: soft resetting port
[ 2476.855210] ATA: abnormal status 0x7F on port 0x0001e007
[ 2476.865714] ATA: abnormal status 0x7F on port 0x0001e007
[ 2476.876786] ata1.00: ata_hpa_resize 1: sectors = 156368016, hpa_sectors = 156368016
[ 2476.888756] ata1.00: ata_hpa_resize 1: sectors = 156368016, hpa_sectors = 156368016
[ 2476.888760] ata1.00: configured for UDMA/33
[ 2476.888771] ata1: EH complete
[ 2476.909818] SCSI device sda: 156368016 512-byte hdwr sectors (80060 MB)
[ 2476.912474] sda: Write Protect is off
[ 2476.912478] sda: Mode Sense: 00 3a 00 00
[ 2476.916458] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA
[ 2507.060115] ata1.00: exception Emask 0x0 SAct 0x0 SErr 0x0 action 0x2 frozen
[ 2507.060126] ata1.00: cmd c8/00:20:b6:2d:04/00:00:00:00:00/e2 tag 0 cdb 0x0 data 16384 in
[ 2507.060128] res 40/00:00:00:00:00/00:00:00:00:00/00 Emask 0x4 (timeout)
[ 2514.052911] ata1: port is slow to respond, please be patient (Status 0xd0)
[ 2537.032018] ata1: port failed to respond (30 secs, Status 0xd0)
[ 2537.032025] ata1: soft resetting port
[ 2537.198411] ATA: abnormal status 0x7F on port 0x0001e007
[ 2537.208918] ATA: abnormal status 0x7F on port 0x0001e007
[ 2537.215986] ata1.00: ata_hpa_resize 1: sectors = 156368016, hpa_sectors = 156368016
[ 2537.223961] ata1.00: ata_hpa_resize 1: sectors = 156368016, hpa_sectors = 156368016
[ 2537.223964] ata1.00: configured for UDMA/33
[ 2537.223975] ata1: EH complete
[ 2537.237244] SCSI device sda: 156368016 512-byte hdwr sectors (80060 MB)
[ 2537.237428] sda: Write Protect is off
[ 2537.237431] sda: Mode Sense: 00 3a 00 00
[ 2537.246640] SCSI device sda: write cache: enabled, read cache: enabled, doesn't support DPO or FUA

List of similar bug reports:
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/37382
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/64587
https://bugs.launchpad.net/linux/+bug/84603
https://bugs.launchpad.net/ubuntu/+bug/104581
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/106864
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/107417
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.20/+bug/112893