Re: Power-drain during suspend?
"Kevin Oberman" <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.mobile |
|---|---|
| Message-ID | <[email protected]> |
> Date: Thu, 09 Feb 2006 11:07:44 +0100 > From: Gregers Petersen <[email protected]> > Sender: [email protected] > > Dear all > > I'm running FreeBSD 6.0 Release on an IBM Thinkpad R51, with a Ati 9000 > GPU and have problems with a very high power comsumption during suspend? > All other issues have been solved and everything is working and stable > (speedstep, lid-suspend, buttons, wifi, network/mouse after suspend > etc.) - I have aprox. 2.5 hours when I run on battery - but if I send > the R51 into suspend (S3) the battery is completely drained after 6-7 hours? > I have been trying to add 'Radeontool' to my suspend/resume scripts - > but this does not solve the problem. > > > Would anybody be able to advice me on this subject ? Sure. It's free and probably worth about that, but: Since you are using RadeonTool, are you just turning off the LCD screen? Yo also should turn off the DAC which is used to drive the VGA connector. # If radeontool is available, turn off the light if [ -x /usr/local/bin/radeontool ]; then /usr/local/bin/radeontool light off /usr/local/bin/radeontool dac off fi I don't bother to turn the DAC back on whenI resume, since I really don't ever use it. Another big issue is setting the power states of PCI devices. While support for this has been in FreeBSD for a while (6.0?), the application of them on some platforms, usually desktops, results in lock-ups. As a result, parts are disabled by default. Most laptops have no problems implementing this capability and turning it on should improve things, as well. hw.pci.do_power_nodriver=[1|2|3] The larger the number, the more aggressive the power limitations. I use '3' on my T30 and it works fine. -- R. Kevin Oberman, Network Engineer Energy Sciences Network (ESnet) Ernest O. Lawrence Berkeley National Laboratory (Berkeley Lab) E-mail: [email protected] Phone: +1 510 486-8634 _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-mobile To unsubscribe, send any mail to "[email protected]"