Date: Thu, 26 Jun 2003 14:51:55 -0400 From: Jesse Guardiani <jesse@wingnet.net> To: freebsd-mobile@freebsd.org Subject: Re: laptop suspend states behaviour Message-ID: <bdffbp$vl3$1@main.gmane.org> References: <20030626101011.GA65846@pcwin002.win.tue.nl> <200306261004.11644.cbiffle@safety.net>
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Cliff L. Biffle wrote: > On Thursday 26 June 2003 03:10 am, Stijn Hoop wrote: >> I'm sorry to say that most of the suspend states aren't very useful. Are >> people able to use any suspend method on other laptops? > > Yes. > > From following this list, it sounds like ACPI in FreeBSD is horribly > broken on > the vast majority of modern laptops. I am fortunate enough not to own > modern laptops. :-) That's the impression I get too. I personally can't decide if I think the problem is with FreeBSD's code, or with manufacturer's failing to follow spec. I think it's mostly the manufacturer's fault, but I think FreeBSD's ACPI and APM efforts are slightly inferior to Linux's on average. That has been _my_ experience anyway. APM works flawlessly under Debian Woody Linux on my IBM A30p, but requires major user space kludging to work well under FreeBSD 5.1-RELEASE. It's not enough to make me want to go back to linux though... :) Not even close. > > On my Toshiba Satellite 1605, ACPI suspend (to RAM and to disk) works > flawlessly. It's worth noting that ACPI suspend-to-disk is several times > faster than APM suspend-to-disk. This machine now runs Gentoo, however, > because of the lurking M5237 USB bug (which I've finally gotten offers for > help on, six months later, but can't have the downtime required to > reinstall the OS twice to test). > > On my IBM Thinkpad 755CX, APM suspend (to RAM and to disk) also works > flawlessly, and is much faster than the Satellite since it's maxed out > with > 40MB of RAM. :-) > > I recently picked up an HP Pavilion N5290 (like the other two, it died and > was discarded by someone who couldn't solder); it's running Gentoo by > default after my issues with USB on the Satellite, so I can't comment > there. Hardware suspend doesn't work -at- -all- on it in Linux, but > software suspend > in their kernel does. You just have to manually patch your kernel to do > it. Whee. Software suspend would make a pretty neat option for FreeBSD, I think. I bet we could do it at least as well as those Linux folks too. -- Jesse Guardiani, Systems Administrator WingNET Internet Services, P.O. Box 2605 // Cleveland, TN 37320-2605 423-559-LINK (v) 423-559-5145 (f) http://www.wingnet.net
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