Dear any interested, I just found out that the hdparm -B and -S parameters were being overridden by the laptop_mode-tools. Whenever I put my laptop on battery after using it on AC, its hdparm values set at boot time are overridden by the settings inside the following file (if you have laptop_mode-tools installed, that is). I hope this will give insight to the devs to do something about this issue. I checked it myself by modifying BATT_HD_POWERMGMT from 1 to 128 and voila, it keeps its 128 value.
Surely, the laptop_mode-tools is the place to fine tune the hdparm vales while on battery. an excerpt of: sudo gedit /etc/laptop-mode/laptop-mode.conf # # Idle timeout values. (hdparm -S) # Default is 2 hours on AC (NOLM_HD_IDLE_TIMEOUT_SECONDS=7200) and 20 seconds # for battery and for AC with laptop mode on. # LM_AC_HD_IDLE_TIMEOUT_SECONDS=20 LM_BATT_HD_IDLE_TIMEOUT_SECONDS=20 NOLM_HD_IDLE_TIMEOUT_SECONDS=7200 # Should laptop mode tools control the hard drive power management settings? # # Set to 0 to disable CONTROL_HD_POWERMGMT="auto" # # Power management for HD (hdparm -B values) # BATT_HD_POWERMGMT=1 LM_AC_HD_POWERMGMT=254 NOLM_AC_HD_POWERMGMT=254 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/952556 Title: [Precise] [Hardware-killer] HD restarts every few seconds To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/hdparm/+bug/952556/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
