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Groups > comp.sys.mac.portables > #1302

Re: Unable to boot up a 15" 2008 MacBook Pro.

From nospam <nospam@nospam.invalid>
Newsgroups comp.sys.mac.portables, comp.sys.mac.system, comp.sys.mac.systems
Subject Re: Unable to boot up a 15" 2008 MacBook Pro.
Date 2019-04-07 21:05 -0400
Organization A noiseless patient Spider
Message-ID <070420192105046259%nospam@nospam.invalid> (permalink)
References (8 earlier) <WNadncK4XKTCJzXBnZ2dnUU7-K2dnZ2d@giganews.com> <060420191129213845%nospam@nospam.invalid> <1fWdnbZdaJ3CZzXBnZ2dnUU7-RHNnZ2d@giganews.com> <060420191558131972%nospam@nospam.invalid> <rvqdnRvXELkZizTBnZ2dnUU7-WfNnZ2d@giganews.com>

Cross-posted to 3 groups.

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In article <rvqdnRvXELkZizTBnZ2dnUU7-WfNnZ2d@giganews.com>, Alan Browne
<bitbucket@blackhole.com> wrote:

> >>>>>> Why would it run slower if it's on its main power connector?
> >>>>>
> >>>>> because peak demands can potentially be above what the power adapter
> >>>>> alone can source.
> >>>>
> >>>> Few run their laptop at peak demand constantly.  And if they did then
> >>>> the battery would deplete.
> >>>
> >>> constant isn't the problem.
> >>>
> >>> *any* peak demand could cause an unexpected shutdown, and to avoid that
> >>> possibility, it runs slower.
> >>
> >> So there is no issue at all for the ordinary user.
> > 
> > there absolutely is, which is why it's done, and not just apple either.
> 
> No real issue.  Under usual "office" conditions at work I rarely see the 
> CPU heavily loaded (iStat) - and that's with VMWare Fusion loaded with 
> Win 7 all of the time and my usual prod. apps on the Mac OS side.

one spike is all it takes, and since that can't be predicted and it's
too late to do anything when it happens, it runs slower to avoid the
possibility of a shutdown.

> >> Anyway I'm fascinated and going to try this on an MBA at work.  Easy
> >> enough to load it up, put the P/S on an ampere meter and compare the
> >> power consumption reported by iStat.  I just need to rig a connector for
> >> the amp meter.
> > 
> > the proper test is a benchmark, with and without a battery. for the
> > latter, you will need to disassemble it.
> 
> A "proper benchmark" I agree.  Seeing significant evidence of it just 
> requires the setup described and observation of a few parameters.

what you describe is not likely to show much, if anything.

a single spike isn't going to have any noticeable effect on the charge
level and is probably too fast for the amp meter to respond anyway.

> > fortunately, that's been done:
> 
> Good for them.  Then you won't object if I do my own thing, will you?

i have no objections nor do i care what you do. 

the fact is that without a battery, macbooks and also some pc laptops
will run slower.

apple used to have a tech note, which has been archived:
<https://web.archive.org/web/20130615084258/http://support.apple.com/kb/
HT2332>
  If the battery is removed from a MacBook or MacBook Pro, the 
  computer will automatically reduce the processor speed. This prevents
  the computer from shutting down if it demands more power than the A/C
  adaptor alone can provide.

  Additional Information
  Important: It is strongly recommended that you do not use your
  MacBook or MacBook Pro while the battery is removed. Accidently
  bumping the A/C adaptor could disconnect power and shutdown the
  computer. Any information that was not saved on your computer would
  be lost.

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Thread

Unable to boot up a 15" 2008 MacBook Pro. ant@zimage.comANT (Ant) - 2019-04-02 13:05 -0500
  Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Baker <nunya@ness.biz> - 2019-04-02 11:12 -0700
    Re: Unable to boot up a 15" 2008 MacBook Pro. ant@zimage.comANT (Ant) - 2019-04-02 13:23 -0500
      Re: Unable to boot up a 15" 2008 MacBook Pro. YK <xxxxx@dialme.com> - 2019-04-02 19:29 -0400
        Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Baker <nunya@ness.biz> - 2019-04-02 16:31 -0700
      Re: Unable to boot up a 15" 2008 MacBook Pro. ErikRS <mac-dane@is.invalid> - 2019-04-04 21:10 +0200
        Re: Unable to boot up a 15" 2008 MacBook Pro. Wade Garrett <wade@cooler.net> - 2019-04-04 18:22 -0400
          Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Browne <bitbucket@blackhole.com> - 2019-04-04 18:36 -0400
            Re: Unable to boot up a 15" 2008 MacBook Pro. Wade Garrett <wade@cooler.net> - 2019-04-08 09:57 -0400
          Re: Unable to boot up a 15" 2008 MacBook Pro. Lewis <g.kreme@gmail.com.dontsendmecopies> - 2019-04-05 04:04 +0000
            Re: Unable to boot up a 15" 2008 MacBook Pro. Wade Garrett <wade@cooler.net> - 2019-04-08 10:10 -0400
          Re: Unable to boot up a 15" 2008 MacBook Pro. ErikRS <mac-dane@is.invalid> - 2019-04-07 14:47 +0200
        Re: Unable to boot up a 15" 2008 MacBook Pro. ant@zimage.comANT (Ant) - 2019-04-04 22:32 -0500
          Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 08:29 -0400
            Re: Unable to boot up a 15" 2008 MacBook Pro. Jolly Roger <jollyroger@pobox.com> - 2019-04-05 15:52 +0000
              Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 12:40 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-05 17:49 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 12:54 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-05 17:59 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 13:10 -0400
            Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Browne <bitbucket@blackhole.com> - 2019-04-05 15:08 -0400
              Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-05 20:29 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 15:35 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-05 21:59 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 17:04 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-05 22:31 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Baker <nunya@ness.biz> - 2019-04-05 14:33 -0700
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-05 22:36 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Baker <nunya@ness.biz> - 2019-04-05 14:55 -0700
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 17:37 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Baker <nunya@ness.biz> - 2019-04-05 14:56 -0700
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 18:01 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. Panthera Tigris Altaica <northentiger@outlook.com> - 2019-04-05 18:07 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Baker <nunya@ness.biz> - 2019-04-05 15:15 -0700
                Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Baker <nunya@ness.biz> - 2019-04-05 14:08 -0700
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-05 22:32 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 17:37 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. Panthera Tigris Altaica <northentiger@outlook.com> - 2019-04-05 17:35 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. danny burstein <dannyb@panix.com> - 2019-04-05 20:04 +0000
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 16:26 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-05 22:50 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 18:01 -0400
              Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 15:35 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-05 20:40 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. danny burstein <dannyb@panix.com> - 2019-04-05 20:05 +0000
                Re: Unable to boot up a 15" 2008 MacBook Pro. Jolly Roger <jollyroger@pobox.com> - 2019-04-05 20:06 +0000
                Re: Unable to boot up a 15" 2008 MacBook Pro. Panthera Tigris Altaica <northentiger@outlook.com> - 2019-04-05 16:17 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. Panthera Tigris Altaica <northentiger@outlook.com> - 2019-04-05 16:14 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-05 22:19 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 17:37 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-05 22:44 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-05 17:50 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-08 16:55 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Browne <bitbucket@blackhole.com> - 2019-04-06 10:40 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-06 11:29 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Browne <bitbucket@blackhole.com> - 2019-04-06 15:13 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. Lewis <g.kreme@gmail.com.dontsendmecopies> - 2019-04-06 19:57 +0000
                Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Browne <bitbucket@blackhole.com> - 2019-04-06 17:08 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-07 21:05 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-06 15:58 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. Jolly Roger <jollyroger@pobox.com> - 2019-04-06 20:04 +0000
                Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Browne <bitbucket@blackhole.com> - 2019-04-06 17:10 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Browne <bitbucket@blackhole.com> - 2019-04-06 17:13 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-07 21:05 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-08 11:58 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-08 10:07 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-08 16:11 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-08 11:19 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-08 20:23 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. Alan Browne <bitbucket@blackhole.com> - 2019-04-06 17:29 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-07 21:05 -0400
              Re: Unable to boot up a 15" 2008 MacBook Pro. ant@zimage.comANT (Ant) - 2019-04-05 21:55 -0500
                Re: Unable to boot up a 15" 2008 MacBook Pro. David in Devon <BDonTJ@REMOVE.gmail.com> - 2019-04-06 09:52 +0100
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-06 08:00 -0400
                Re: Unable to boot up a 15" 2008 MacBook Pro. nospam <nospam@nospam.invalid> - 2019-04-06 08:00 -0400

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