| 2009-01-16 08:20:10 |
Bryce Harrington |
description |
Binary package hint: linux-source-2.6.22
While using GUTSY daily build 05-JUN-2007, with powertop 1.5 installed, I noticed that my computer was in the C2 power-saving state for an average of 95%+ of the time, and was not able to reach the battery-friendly C3 and C4 states. After some experimentation, I realized that this problem was caused by the wireless interface just being up, **even when not associated to any Access Point**. Just issuing 'ifconfig ath0 down', or disabling wireless in the Network Manager applet, would allow the computer to reach C3/C4 just fine, increasing my battery time significantly.
My laptop is an Acer 3624, with a built-in Atheros Wi-fi Card.
# uname -a
Linux ubuntu 2.6.22-6-generic #1 SMP Fri Jun 1 19:24:12 GMT 2007 i686 GNU/Linux |
Binary package hint: linux-source-2.6.22
While using GUTSY daily build 05-JUN-2007, with powertop 1.5 installed, I noticed that my computer was in the C2 power-saving state for an average of 95%+ of the time, and was not able to reach the battery-friendly C3 and C4 states. After some experimentation, I realized that this problem was caused by the wireless interface just being up, **even when not associated to any Access Point**. Just issuing 'ifconfig ath0 down', or disabling wireless in the Network Manager applet, would allow the computer to reach C3/C4 just fine, increasing my battery time significantly.
My laptop is an Acer 3624, with a built-in Atheros Wi-fi Card.
# uname -a
Linux ubuntu 2.6.22-6-generic #1 SMP Fri Jun 1 19:24:12 GMT 2007 i686 GNU/Linux
[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile 915GM/PM/GMS/910GML Express Processor to DRAM Controller [8086:2590] (rev 03)
Subsystem: Acer Incorporated [ALI] Unknown device [1025:006a]
00:02.0 VGA compatible controller [0300]: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller [8086:2592] (rev 03) (prog-if 00 [VGA])
Subsystem: Acer Incorporated [ALI] Unknown device [1025:006a]
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