[ltp] screen remains black after standby on the X40

[Henrique de Moraes Holschuh]

On Tue, 10 Mar 2009, Karsten König wrote:
> A google search does turn up alot about this, for example compiz / general 
> composite seems to blame sometimes, I just set it back on and could resume 
> fine, don't know about the time it didn't work for me.

Don't get normal "screen doesn't come up on resume" bug reports mixed with
"screen harware was destroyed on resume" ;-)  The first class is annoying
but expected.  The later is *extremely* grave and has happened at least once
in the past.

> The system itself is not dead, not even the graphics driver it looks like, 
> just the screen power or something.
> http://forums.fedoraforum.org/showthread.php?t=205270

Yeah, it looks like it does something Bad to the backlight PWM control,
since it hits LEDs (inverter-less) and CCFL (inverter-based) boxes alike.

> Looks like a very confusing issue =(

That it is, that it is...

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh