From Bugzilla Helper: User-Agent: Mozilla/4.78 [en] (X11; U; Linux 2.4.9-7 i686) Description of problem: Since upgrading to a 2.4.x kernel (starting with Redhat 7.1), my IBM Thinkpad T20 has had significantly reduced battery life. apm is running and suspend and spin/downs work fine. Under 7.0 I got 2.5 hours under normal use. Under 7.1 I got 1.5 hours. Under 7.2 it's improved to 1.75 hours. I've used lsof to look for open files that access may be causing excessive disk usage, and found that the XFree86 log was logging power events constantly. After turning off X logging, the situation has not improved. I've also tried mounting my fs's noatime and running the noflushd (which spins down the disk delays bdflush's writes until disk activity was going to happen anyway), but this made only a small difference. I am using ext3 and was using ext2 under Redhat 7.1 and previous versions. Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1. Turn on laptop 2. Work 3. Watch battery decline quickly and then go inside to plug it in. Additional info:
I have found that the USB controller on my Thinkpad 390E takes quite a bit of power, consistent with you seeing reduced battery life since Redhat 7.0. IRDA modules also suck a lot of battery life. I use my own 'usb-on' and 'usb-off' scripts: ex. usb-off would be: /sbin/rmmod [any USB device drivers] umount /proc/bus/usb /sbin/rmmod usb-uhci /sbin/rmmod usbcore and usb-on is: #!/bin/sh /sbin/modprobe -k usb-uhci mount -t usbdevfs usbdevfs /proc/bus/usb Turning off USB brings my battery life from just over 2.5 hours to 3.5 hours. -Craig
Thanks for the bug report. However, Red Hat no longer maintains this version of the product. Please upgrade to the latest version and open a new bug if the problem persists. The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, and if you believe this bug is interesting to them, please report the problem in the bug tracker at: http://bugzilla.fedora.us/