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From: dowdy@apple.UUCP (Tom Dowdy)
Newsgroups: comp.sys.mac
Subject: Re: SE display bug survey results (medium long)
Message-ID: <1387@apple.UUCP>
Date: Wed, 29-Jul-87 11:54:29 EDT
Article-I.D.: apple.1387
Posted: Wed Jul 29 11:54:29 1987
Date-Received: Fri, 31-Jul-87 06:17:48 EDT
References: <409@sdacs.ucsd.EDU> <1370@apple.UUCP> <421@sdacs.ucsd.EDU>
Reply-To: dowdy@apple.UUCP (Tom Dowdy)
Organization: Apple Computer Inc., Cupertino, USA
Lines: 42

In article <421@sdacs.ucsd.EDU> wade@sdacs.ucsd.EDU (Wade S. Blomgren) writes:
>In article <1370@apple.UUCP>, ems@apple.UUCP (Mike Smith) writes:
>> Have you put a straight edge of some kind next to the wiggling lines
>> to see how much they wiggle?  If it is measureable, then it would have
>
>As the original poster of the survey and the responses, I though I would
>reply to Mike. This same thought occured to me, and I performed the
>'paper test' also. My original SE and the current replacement failed
>miserably. These things Wiggle, with a capital W.  I hate it. I am
>giving the current machine a few weeks to see if it gets worse but even
>if it does not I fear I will have to exchange it again...and again.
>

I tried out the paper test as well.  I thought I saw a wiggle in the
other direction at all times.  (ie, when the paper was vertical, I said,
oh horizontal wiggles, when the paper was hoizontal, oh vertical wiggles)
I came to the conclusion that maybe what it really is is a variation in
screen intensity.  Some additional observations:

- It is much more pronounced in the upper left corner, not so much so
  in the lower right, and on mine I cant see it anyplace else.
- If you want to see something REALLY interesting, go into some sort of
  editor with a "select all" option.  Place paper vertically on the
  right side, punch "select all" and you'll notice the screen move in
  about 1/4 of an inch.
- I never notice it and it never bothers me at all except when everyone
  here keeps bringing it up.  I probably wouldn't have noticed it at all
  except that someone brought it up.  It does not bother me, I do not hate it.
- The effect is much more pronounced under florecent lights.
  (of course it is, everyone blames everything on them.)

Someone made some comments about eating and looking at a Mac screen.
This is an effect that can also be seen at the Exploitorium in SF.
They have a light called "The Bronx Cheer Blub" which is one of those
flickering candle type lights.  If you stand away from it and give
it a rasberry at the right "speed" then the flicker will stand still.

  Tom Dowdy                 CSNET:    dowdy@apple.CSNET
  Apple Computer MS:27Y     AppleLink:DOWDY1
  20525 Mariani Ave         UUCP:     {sun,voder,amdahl,decwrl}!apple!dowdy
  Cupertino, CA 95014       
  "Plus ca change, Plus c'est la meme chose."