Upgraded to the latest BIOS, bug still present. Here's what I did: 1. echo min_power |sudo tee /sys/class/scsi_host/host*/link_power_management_policy 2. Provoked disk activity by starting Firefox. Everything hangs for a while, messages in dmesg pasted below. 3. Returned to normal operation with: echo max_performance |sudo tee /sys/class/scsi_host/host*/link_power_management_policy
Requested output: $ sudo dmidecode -s bios-version && sudo dmidecode -s bios-release-date 7LETD0WW (2.30 ) 02/27/2012 dmesg output: [ 340.064083] ata3.00: exception Emask 0x0 SAct 0x1 SErr 0x40000 action 0x6 frozen [ 340.064088] ata3: SError: { CommWake } [ 340.064092] ata3.00: failed command: READ FPDMA QUEUED [ 340.064099] ata3.00: cmd 60/18:00:df:85:9f/00:00:04:00:00/40 tag 0 ncq 12288 in [ 340.064099] res 40/00:00:00:4f:c2/00:01:00:00:00/00 Emask 0x4 (timeout) [ 340.064102] ata3.00: status: { DRDY } [ 340.064108] ata3: hard resetting link [ 340.552105] ata3: SATA link up 1.5 Gbps (SStatus 113 SControl 300) [ 340.553225] ata3.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded [ 340.553230] ata3.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out [ 340.553449] ata3.00: ACPI cmd ef/5f:00:00:00:00:a0 (SET FEATURES) succeeded [ 340.553454] ata3.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out [ 340.555876] ata3.00: ACPI cmd ef/02:00:00:00:00:a0 (SET FEATURES) succeeded [ 340.555882] ata3.00: ACPI cmd f5/00:00:00:00:00:a0 (SECURITY FREEZE LOCK) filtered out [ 340.556077] ata3.00: ACPI cmd ef/5f:00:00:00:00:a0 (SET FEATURES) succeeded [ 340.556083] ata3.00: ACPI cmd ef/10:03:00:00:00:a0 (SET FEATURES) filtered out [ 340.557176] ata3.00: configured for UDMA/100 [ 340.557381] ata3.00: device reported invalid CHS sector 0 [ 340.557395] ata3: EH complete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/993507 Title: ATA errors when link_power_management_policy is min_power To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/993507/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs