Date: Mon, 31 Jan 2000 00:04:54 +0100 From: "Jose M. Alcaide" <jose@we.lc.ehu.es> To: freebsd-mobile@FreeBSD.org Subject: some questions about APM Message-ID: <3894C396.D31AF876@we.lc.ehu.es>
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Hello, I am a newbie in the laptop world, so I have several basic questions about APM. I'll be very thankful to anyone who answers any of these questions :) The laptop I am using is a Dell Inspiron 3700, and it is running 3.4-RELEASE. Also, I must say that I have carefully read the source of the apm(4) driver. 1. I am confused about the "idling CPU" support. My laptop has an APM BIOS setting called "Smart CPU" which, when enabled, "adjusts the CPU clock according to the needs of the application" [sic]. However, the apm(4) boot messages say "Idling CPU disabled" -when compiled with APM_DEBUG set-; this information is returned by the APM_INSTCHECK vm86 call to the APM BIOS. 2. Is there any way to know whether the APM BIOS halts the CPU when the "CPU idle" function is invoked? 3. What is the difference between APM "engage" and "enable"? 4. Are the APM BIOS settings overridden by the apm(4) initialization? (Note: I added VM86 support to the kernel). I set timeouts for LCD turnoff and system suspend, but they don't have any effect once apm(4) has been initialized -even before being enabled-: when I interrupt the system boot (in the loader, when APM has not been yet initialized), the APM BIOS timeouts work; but, after booting in single user mode (so apm has not been yet enabled), they don't. However, the "hard disk timeout" _does_ work. 5. Is the APM BIOS API available for free downloading? I followed a link from the PAO home page to the Intel web site, but it is broken; then, I searched the Intel web site for any APM developer guide, to no avail :( . Of course, I am willing to collaborate to improve the FreeBSD's APM support. As I said above, I'll be grateful for any answer to any of these questions. Cheers, -- JMA ----------------------------------------------------------------------- José Mª Alcaide | mailto:jose@we.lc.ehu.es Universidad del País Vasco | mailto:jmas@FreeBSD.org Dpto. de Electricidad y Electrónica | http://www.we.lc.ehu.es/~jose Facultad de Ciencias - Campus de Lejona | Tel.: +34-946012479 48940 Lejona (Vizcaya) - SPAIN | Fax: +34-946013071 ----------------------------------------------------------------------- "Beware of Programmers who carry screwdrivers" -- Leonard Brandwein To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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