Just bought a Thinkpad Edge 13" laptop and running Powertop 1.12 says that wakeups from idle is 219 on average.
Battery is a long way from the promised 6-7 hours I read about in tech reviews (not manufacturers own blurb). My server has about 15-30 wakeups from idle running Ubuntu Server 9.10. I installed Ubuntu 10.04 beta2 on the Thinkpad. Is this "normal"? The biggest culprit is kernel scheduler (tick_sched_timer I think) and the iwlagn adapter, and i've manually applied several power saving tips from lesswatts.org without it having any noticeable impact on wakeups from idle: echo 5 > /proc/sys/vm/laptop_mode echo 1500 > /proc/sys/vm/dirty_writeback_centisecs echo min_power > /sys/class/scsi_host/host0/link_power_management_policy ethtool -s eth0 wol d hciconfig hci0 down rmmod <all_bluetooth_modules> I'm using relatime on all filesystems (ext4), using OnDemand CPU Freq. scaling governer and Compiz is disabled. I know I haven't listed what powertop says (at work no access to laptop) but is 219 a general average value or is it way too high for a laptop with wireless/bluetooth? Note that this laptop is a 10 watt laptop using a CULV CPU, hence the average 6-7 hrs real life battery time according to reviews (using Win7). Regards, Andrew
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