max brightness

Carsten Haitzler (The Rasterman) raster at
Fri Sep 26 15:43:00 CEST 2008

On Wed, 13 Aug 2008 22:54:20 -0700 Brad Pitcher <brad at> babbled:

> I was playing around with changing the brightness by putting number in 
> the brightness file under /sys/class/... and I noticed that I'm not 
> allowed to write anything higher than 63.  Is that the max brightness?  
> The only reason I have doubts about it is because 63 seems to be such an 
> arbitrary number.  I would like to know if it's possible to make it even 

63 == 64 -1 == 2^6 - 1 == 0x3f hex.. which is 00111111 binary... which is quite
a nice number as its the maximum you can store in 6 bits... and 0 is the


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The Rasterman (Carsten Haitzler)    raster at

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