Public bug reported: Binary package hint: linux-source-2.6.24 Version: 2.6.24-16-generic
expected behavior: since kernel 2.6.24 has included SATA ALPM power management patch from LessWatts.org (1) I should be able to modify /sys/class/scsi_host/host1/link_power_management_policy accordingly to my needs what happens instead: despite being able to tweak those files in previous 2.6.24 kernel revisions (for the hosts folders that provide them), at some point this was broken. At the moment I face a regression since editing link_power_management_policy has no effect (i.e. if I change max_performance to min_power either manually or via sysfsutils the changes are not saved but reverted instantly). Nothing appears in syslog, messages or dmesg. (1) http://www.lesswatts.org/projects/devices-power-management/sata.php ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Description changed: Binary package hint: linux-source-2.6.24 - - affected package: linux-source-2.6.24 - version: 2.6.24-16-generic + Version: 2.6.24-16-generic expected behavior: since kernel 2.6.24 has included SATA ALPM power management patch from LessWatts.org (1) I should be able to modify /sys/class/scsi_host/host1/link_power_management_policy accordingly to my needs - what happens instead: despite being able to tweak those files (for the - hosts folders that provide them) in previous 2.6.24 kernel revisions, at - some point this broke. Now editing link_power_management_policy has no - effect (i.e. if I change max_performance to min_power either manually or - via sysfsutils the changes are not saved but reverted instantly). + what happens instead: despite being able to tweak those files (for the hosts folders that provide them) in previous 2.6.24 kernel revisions, at some point this was broken. + At the moment editing link_power_management_policy has no effect (i.e. if I change max_performance to min_power either manually or via sysfsutils the changes are not saved but reverted instantly). Nothing appears in syslog, messages or dmesg. (1) http://www.lesswatts.org/projects/devices-power-management/sata.php ** Summary changed: - cannot change scsi host link power power management + cannot change scsi host link power management ** Summary changed: - cannot change scsi host link power management + cannot change scsi host link_power_management_policy ** Description changed: Binary package hint: linux-source-2.6.24 Version: 2.6.24-16-generic expected behavior: since kernel 2.6.24 has included SATA ALPM power management patch from LessWatts.org (1) I should be able to modify /sys/class/scsi_host/host1/link_power_management_policy accordingly to my needs - what happens instead: despite being able to tweak those files (for the hosts folders that provide them) in previous 2.6.24 kernel revisions, at some point this was broken. - At the moment editing link_power_management_policy has no effect (i.e. if I change max_performance to min_power either manually or via sysfsutils the changes are not saved but reverted instantly). + what happens instead: despite being able to tweak those files in + previous 2.6.24 kernel revisions (for the hosts folders that provide + them), at some point this was broken. + + At the moment I face a regression since editing link_power_management_policy has no effect (i.e. if I change max_performance to min_power either manually or via sysfsutils the changes are not saved but reverted instantly). Nothing appears in syslog, messages or dmesg. (1) http://www.lesswatts.org/projects/devices-power-management/sata.php -- cannot change scsi host link_power_management_policy https://bugs.launchpad.net/bugs/231342 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
