Re: Wallstreet with OS X - LCD backlight flaky

[Mikael Byström]

Paul, [EMAIL PROTECTED] said:

>Hi,
>
>The LCD  backlight on son's Wallstreet running 10.2.8 sometimes refuses 
>to illuminate, in spite of attempts to adjust it up using the 
>brightness button above the keyboard.
>
>It works fine under 9.2.2, illuminating over the full brightness range.
>
>It looks like a software problem. Does any one have any clues as to 
>what is going wrong and how to fix it?
>
 Paul, if you mean that the display backlighting is totally turned off
and that this happens after the powerbook was sleeping and lost power so
it got turned off or similar situations, then that problem can to my
knowledge only be cured by booting into OS 9 once, from disk or CD. I
have normally have to do it twice as my computer crashes the first time I
boot into OS 9, after I have this problem.

If you want to boot from OS 9 internally and the display backlighting is
off you can see what you're doing by pointing a spotlight to the screen.
Then choose to boot from the OS 9 system the normal way. You may find it
more convenient to pop in a OS 9 CD and restart with the start button and
press down "c".

I suppose there's some PRAM setting for Quartz or something that goes
bonkers when this problem occur (usually the display goes dark only when
Quartz first kicks in). From your description I guess you're discovering
the problem *after* one situation when the machine lost power and you
have booted anew and then put it to sleep. In some situations pressing
the light button back and forth may finally turn on the display until
next time you set it to sleep or reboot. In my experience booting into OS
9 is the only thing that can reliably cure this to allow for normal
restarts and sleep. If someone knows exactly why this problem occur and
whether one can get to this setting in some other way, that would be
interesting to know.

I do seem to remember one can get rid off the ATI drivers and this
problem will go away, but of course one wonders if that will make
graphics slower. My guess it will not as Quartz graphics in a Wallstreet
is typically calculated in the CPU and RAM anyway (as there is no QE
support nor enough RAM to do hardware accelaration). I guess the driver
can be taken offline by removing "Sys
tem:Library:Extensions:ATIRagePro.kext", but I'm not completely positive
this is the right file and I haven't verified that this problem actually
goes away by removing it. Maybe someone else can fill in here. Or just
try and see for yourself.




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Re: Wallstreet with OS X - LCD backlight flaky

[Paul Nicholson]

On Jan 6, 2004, at 3:11 PM, Clark Martin wrote:

At 9:26 AM -0800 1/5/04, Paul Nicholson wrote:
Hi,

The LCD  backlight on son's Wallstreet running 10.2.8 sometimes 
refuses to illuminate, in spite of attempts to adjust it up using the 
brightness button above the keyboard.


I don't know if it applies but I ran into something similar.   I have 
a Wallstreet running 10.2.6.

In my case, following a crash the backlighting would initially light 
up during boot but would later black out.  Once the system booted I 
could hit the brightness button and it would light up.  But if I put 
it to sleep and then woke it up the screen would not light up and 
there was no response from the brightness button.  The solution I 
found was to restart in OS 9.2.2 then put it to sleep and wake it back 
up again.  After that I could reboot into OS X and all would be well.
It sounds like the same bug. To verify the hardware worked, I installed 
OS-9 on the machine. After that the brightness worked for a while.

Paul

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Re: Wallstreet with OS X - LCD backlight flaky

[Clark Martin]

At 9:26 AM -0800 1/5/04, Paul Nicholson wrote:
Hi,

The LCD  backlight on son's Wallstreet running 10.2.8 sometimes 
refuses to illuminate, in spite of attempts to adjust it up using 
the brightness button above the keyboard.

It works fine under 9.2.2, illuminating over the full brightness range.

It looks like a software problem. Does any one have any clues as to 
what is going wrong and how to fix it?


I don't know if it applies but I ran into something similar.   I have 
a Wallstreet running 10.2.6.

In my case, following a crash the backlighting would initially light 
up during boot but would later black out.  Once the system booted I 
could hit the brightness button and it would light up.  But if I put 
it to sleep and then woke it up the screen would not light up and 
there was no response from the brightness button.  The solution I 
found was to restart in OS 9.2.2 then put it to sleep and wake it 
back up again.  After that I could reboot into OS X and all would be 
well.
--
Clark Martin
Redwood City, CA, USA
Macintosh / Internet Consulting

"I'm a designated driver on the Information Super Highway"

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Wallstreet with OS X - LCD backlight flaky

[Paul Nicholson]

Hi,

The LCD  backlight on son's Wallstreet running 10.2.8 sometimes refuses 
to illuminate, in spite of attempts to adjust it up using the 
brightness button above the keyboard.

It works fine under 9.2.2, illuminating over the full brightness range.

It looks like a software problem. Does any one have any clues as to 
what is going wrong and how to fix it?

Paul

--
G-Books is sponsored by  and...
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-- Check our web site for refurbished PowerBooks  |  & CDRWs on Sale!  |
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