Colin Guthrie gmane at colin.guthr.ie
Thu Nov 29 11:10:51 PST 2007

Jesse Barnes wrote:
> On Wednesday, November 28, 2007 1:08 am Lukas Hejtmanek wrote:
>> On Sat, Nov 24, 2007 at 03:34:57AM +0000, Sergio Monteiro Basto wrote:
>>> Lukas, I see 3 patches in this tread, what is the best combination ?
>>> "also something" say that is this patch more something, should I apply
>>> all of the 3 or just yours 2 ?
>>> I have applied yours 2 and no crash nor flicks.
>> You should apply all 3 patches to have the backlight behaving mostly
>> correct.
> Does this patch work for you guys?
> It properly gets the backlight at startup time, saves and restores it across 
> DPMS on/off calls, and doesn't mess with it at startup time (iow it assumes 
> you have it where you want it when you start X).

If I set the backlight control to native via xrandr (as you pointed out
in another thread). Then my backlight works fine with these patches, but
then I'm not certain how badly it was broken before as I didn't try
native mode!

Under kernel mode (the default) the backlight doesn't appear to function
too well. Previously it was maxed out, but after the patches it was
minimal but to be honest I'm not sure that's 100% correct as it was all
quite random and it flipped round when power was removed etc.

But like I say with native mode and these patches it seems to work fine,
although one thing that's interesting is that the BACKLIGHT level
doesn't change in xrandr --prop regardless of the actual light level...
it always says:

        BACKLIGHT: 624 (0x00000270) range:  (0,624)


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