Added dmesg log, in my case the affected links (0 and 5) are actually empty:
[r...@acer attilio]# cat /sys/class/scsi_host/host0/link_power_management_policy max_performance [r...@acer attilio]# cat /sys/class/scsi_host/host1/link_power_management_policy min_power [r...@acer attilio]# cat /sys/class/scsi_host/host2/link_power_management_policy min_power [r...@acer attilio]# cat /sys/class/scsi_host/host3/link_power_management_policy min_power [r...@acer attilio]# cat /sys/class/scsi_host/host4/link_power_management_policy min_power [r...@acer attilio]# cat /sys/class/scsi_host/host5/link_power_management_policy max_performance ** Attachment added: "dmesg_sata_link_power.txt" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/427925/+attachment/1551466/+files/dmesg_sata_link_power.txt -- unable to modify scsi host link_power_management_policy https://bugs.launchpad.net/bugs/427925 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
