Re: OS startup goals and steps

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From	"Rod Pemberton" <boo@fasdfrewar.cdm>
Newsgroups	alt.os.development
Subject	Re: OS startup goals and steps
Date	Sat, 18 Jul 2015 03:35:16 -0400
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On Fri, 17 Jul 2015 13:07:53 -0400, James Harris <james.harris.1@gmail.com> wrote:
> "Rod Pemberton" <boo@fasdfrewar.cdm> wrote in message
> news:op.x1ww75aiyfako5@localhost...
>> On Thu, 16 Jul 2015 05:32:36 -0400, James Harris
>> <james.harris.1@gmail.com> wrote:

>>> OK. Someone may (unwisely? or because the monitor has died) unplug
>>> one monitor and plug in another one while the OS is running [...]
>>
>> IMO, bad idea.  Very bad. :-(
>>
>> Even if it is working afterwards, it may fail later on,
>> or may work but not work correctly.
>>
>> One damaged circuit can cause cascade failures in others.
>> I.e., what typically happens to electronics after static
>> electric shock or a power surge.  Circuit starts acting
>> "wierd" then they fail or go up in smoke.
>>
>> *ONLY*  do this if your company could lose millions of
>> dollars by turning off the machine after the monitor fails.
>> Hot swapping parts should be left for emergencies, or in
>> rare instances for electronic repair technicians who know
>> what they're doing.
>>
>> USB is the only thing I'll hot-plug.
>>
>> If you seriously think you'll have a user, e.g., co-worker
>> or child, that would do that, then I'd recommend screwing
>> down the connector screws real tight and use some thread
>> locker and/or epoxy.
>>
>> Otherwise, you risk all the time and money re-building a
>> new computer.  As someone who has experienced too much
>> electronics failure, both at home and as part of a past
>> job, this is a small nightmare I'd willingly avoid.
>
> Marvellously extreme view, Rod ... up in smoke, millions
> of dollars, and epoxy!
>
> If anyone is seeking a more balanced view see
>
>   https://en.wikipedia.org/wiki/VGA_connector

That's definately not a "balanced" view ...  I'd say a novice wrote
that.  Clearly, not one electrical engineer, nor any electronic
technicians contributed to that paragraph.  That's the opinion of
some guy who said, "Let's try it!", then unplugged a monitor at home
and plugged it back in without anything failing, immediately.  That
article definately needs a "Please Cite" tag on that speculative
description.

The important words are this, with emphasis added:

"The VGA interface is NOT ENGINEERED to be hotpluggable ..."

So, it's a complete crap shoot at that point as to whether it works
for you or not.

Even if a newer standard said it's hot plugable, I still wouldn't
do it.  E.g., apparently, HDMI and DVI-D are hot swappable per
specification.  I'm very hesistant even with USB.  The reasons why
I wouldn't use hot plugable capability are straightforward:

1) the monitor and video card are two of the most expensive components
2) the monitor and video care use a bunch of shock sensitive electronics
3) sometimes hot pluggable requirements aren't implemented correctly or
fail to work as expected or only have limited protection
4) if a port fails on the monitor and video card, you're out of ports,
unlike USB where you have many more or you can expand them
5) I have plenty of past experience hot plugging electronics

So, no, Wikipedia's lame and ignorant comment didn't change my opinion.


Rod Pemberton

-- 
Scientist now say we'll experience a mini-ice in 2030.
So, I guess we need more global warming today ...

Thread

OS startup goals and steps "James Harris" <james.harris.1@gmail.com> - 2015-07-14 10:35 +0100
  Re: OS startup goals and steps "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-15 04:00 -0400
    Re: OS startup goals and steps "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-15 22:29 -0400
      Re: OS startup goals and steps "James Harris" <james.harris.1@gmail.com> - 2015-07-16 08:00 +0100
        Re: OS startup goals and steps "James Harris" <james.harris.1@gmail.com> - 2015-07-16 11:01 +0100
          Re: OS startup goals and steps "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-17 05:40 -0400
            Re: OS startup goals and steps "wolfgang kern" <nowhere@never.at> - 2015-07-17 17:58 +0200
        Re: OS startup goals and steps "Alexei A. Frounze" <alexfrunews@gmail.com> - 2015-07-16 03:24 -0700
  Re: OS startup goals and steps "James Harris" <james.harris.1@gmail.com> - 2015-07-16 10:32 +0100
    Re: OS startup goals and steps "wolfgang kern" <nowhere@never.at> - 2015-07-16 16:04 +0200
      Re: OS startup goals and steps "James Harris" <james.harris.1@gmail.com> - 2015-07-17 06:44 +0100
        Re: OS startup goals and steps "wolfgang kern" <nowhere@never.at> - 2015-07-17 17:50 +0200
    Re: OS startup goals and steps "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-17 06:10 -0400
      Re: OS startup goals and steps "James Harris" <james.harris.1@gmail.com> - 2015-07-17 18:07 +0100
        Re: OS startup goals and steps "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-18 03:35 -0400
  Re: OS startup goals and steps "wolfgang kern" <nowhere@never.at> - 2015-07-16 14:42 +0200
    Re: OS startup goals and steps "Rod Pemberton" <boo@fasdfrewar.cdm> - 2015-07-17 05:48 -0400
      Re: OS startup goals and steps "wolfgang kern" <nowhere@never.at> - 2015-07-17 17:29 +0200

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