Re: Laptop ACPI question
Peter Schuller <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.mobile |
|---|---|
| Message-ID | <[email protected]> |
> SpeedStep, as I understand it, is adjustment of the CPU clock speed and > is VERY directly tied to battery life. It is what systems supporting > SpeedStep adjust when moving from AC to battery modes. E.g. my T30, by > default, runs at 1.8 GHz on AC and 1.2 GHz on battery (with my BIOS > configuration). SpeedStep is a marketing name and I am unwilling to say > that it is limited to the CPU speed. It may include some of the other > power management tools like deep sleep modes. Ah, okay. In that case it seems to be party supported already (on 5.2, I think even 5.1). Or if not SpeedStep, then some alternative to it. On the T40p I am able to control the speed of the CPU in performance/economy mode by modifying sysctl variables. (Though I am actually running with APM since ACPI causes hangs - though I'm just about to try it on CURRENT.) > Support of CPU frequency is something that is actively being developed > and will almost certainly be in 5.3. PCI power mode support is also in > active development and was committed to CURRENT a few weeks ago, but at > least partly backed out due to problems on a few laptops. (It worked > GREAT on mine, though). I hope it is returned soon as it make my sound > work after a suspend. I remember reading about the PCI stuff and the DPMS/screen poweroff issue on -current. But I must have missed the part about it involving power saving, I thought it was just bug/crash fixes. > So power management is getting closer all the time and I am pretty > confident (for someone who is NOT writing the code) that it will all be > ready when V5 is declared STABLE. Looking forward to a 5-STABLE regardless :) Thanks! -- / Peter Schuller, InfiDyne Technologies HB PGP userID: 0xE9758B7D or 'Peter Schuller <[email protected]>' Key retrieval: Send an E-Mail to [email protected] E-Mail: [email protected] Web: http://www.scode.org _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-mobile To unsubscribe, send any mail to "[email protected]"