This is still broken (or broken again) in 16.04. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pm-utils in Ubuntu. https://bugs.launchpad.net/bugs/738757
Title: spindown settings lost on pm-suspend indirectly affects powernap power savings Status in hdparm package in Ubuntu: Fix Released Status in pm-utils package in Ubuntu: Invalid Bug description: Binary package hint: hdparm Upon wakeup from pm-suspend, all spindown settings on drives as set in hdparm.conf are lost and drives will not spindown until reboot. This will affect the performance of such useful packages such as powernap, since drives will not enter spindown after the first time a system is suspended and then resumed. Power will be wasted, watts that could be saved will be lost!!! Upon investigation I found that a similar problem has been found and fixed for APM settings by use of the script /usr/lib/pm-utils/power.d /95hdparm-apm, which restores '-B' APM hdparm settings on capable drives following power events if laptop-mode-tools are not installed. Since laptop-mode-tools is not a suitable package for a server environment, it is important the hdparm provide a similar script for spindown. Indeed, hdparms has already set the precedent that it should provide such backstop functionality as part of the package to support pm-utils functionality for critical drive parameters. I have prepared a patch file that is more or less a clone of the script used for the APM functionality, but which restores the '-S' spindown hdparm parameters. I suggest that it be placed in /usr/lib /pm-utils/sleep.d/95hdparm-spindown. I kept the hdparm-try-apm test so that it will not apply to USB or firewire drives, and also kept the logic so that is applied only on drives that support APM (figured that test wouldn't hurt and might be important). I assumed it would not apply in pm-powersave and so moved it from power.d/ to sleep.d/. As a side note, I also have a patch I am submitting to powernap to extend functionality to add a monitor plugin that will key off drive standby/sleep state. The patch will only work, however, if the drives spindown more than once per boot... To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/hdparm/+bug/738757/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
