Date: Fri, 11 May 2007 11:57:29 +0100 From: Rui Paulo <rpaulo@fnop.net> To: "Florian C. Smeets" <flo@kasimir.com> Cc: freebsd-smp@freebsd.org Subject: Re: Fixing SMP on MacBooks Message-ID: <86odkrpqzq.wl%rpaulo@fnop.net> In-Reply-To: <86ps57pr2t.wl%rpaulo@fnop.net> References: <86sla45iq9.wl%rpaulo@fnop.net> <46444339.6030707@kasimir.com> <86ps57pr2t.wl%rpaulo@fnop.net>
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At Fri, 11 May 2007 11:55:38 +0100, Rui Paulo wrote: > > At Fri, 11 May 2007 12:19:37 +0200, > Florian C. Smeets wrote: > > > > -----BEGIN PGP SIGNED MESSAGE----- > > Hash: SHA512 > > > > Rui Paulo wrote: > > > Hi, > > > > Hi! > > > > > I would like to bring this discussion to a wider audicence. > > > > > > So, here's the problem: > > > As some of you already know, the second core on Apple's MacBooks fails > > > to start. There are two nasty tricks to make it start (both involve > > > interactivity from the user) that I know of. > > > > > > They are: > > > 1) Press the power button during the IPI timeout; > > > 2) Press a key [1] before the IPIs are sent *OR* during the > > > IPI timeout. > > > > > > [1] This is really an interrupt. Pressing the Fn key doesn't work > > > because the Fn key doesn't generate an interrupt. > > > > > > There tricks don't work on the MacBook Pro. While the source of the > > > problem might be the same, it's not clear why the tricks work. > > > > > > > Well i was able to boot a 7-CURRENT snapshot from February or March on a > > first rev. MBP and it did recognize the second core when pressing the > > power button right after this line: > > > > ACPI APIC Table: <APPLE Apple00> > > > > This used to work reliably. > > Have you tried pressing a key? > I also have a first rev MBP and it works. Oops, sorry, I don't have a MackBook Pro. I have a MacBook. Do you really have a MacBook Pro? AFAIK that trick never worked on the Pro version. -- Rui Paulo
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