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Groups > comp.sys.mac.portables > #1303

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 <070420192105056320%nospam@nospam.invalid> (permalink)
References (8 earlier) <WNadncK4XKTCJzXBnZ2dnUU7-K2dnZ2d@giganews.com> <060420191129213845%nospam@nospam.invalid> <1fWdnbZdaJ3CZzXBnZ2dnUU7-RHNnZ2d@giganews.com> <slrnqai14v.24qs.g.kreme@rey.lan> <Cqudnf-u-YGsiDTBnZ2dnUU7-QHNnZ2d@giganews.com>

Cross-posted to 3 groups.

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In article <Cqudnf-u-YGsiDTBnZ2dnUU7-QHNnZ2d@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.
> > 
> > Untrue. The computer will hit peak demand at times for any user.
> 
> At which point it will just run slower than usual.  So no issue, really.

at that point, it's too late, so yes issue.

> >> 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.
> > 
> > You need to run the test on a laptop with a removable battery that has
> > been removed. Your proposed test will show nothing about the topic at
> > hand.
> 
> Of course it will.  It's all in how one sets up the experiment.

except that what you've described won't do that.

> If the computer is running full tilt and the external power supply can't 
> keep up then I should see the battery charge level fall.  Keeping it at 
> (or near) peak for extended periods is easy enough using CPU efficient 
> apps like handbrake.

a single sudden spike won't cause a noticeable change in battery charge
level.

> I'll also see the current max out on the external power supply while the 
> iStat data should show more total power being used than that delivered 
> by the external power supply.

you might see it max out, but that doesn't tell you what would happen
with a spike, which you won't be able to invoke on demand.

> Unfortunately I'm traveling a lot this week so I won't get to it until 
> after the 15th or so.

best to use that time to rethink what you're testing.

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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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