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Subject: Re: [PATCH] Added backlight driver for Acer Aspire 4736
From: joeyli <jlee@suse.com>
To: Pradeep Subrahmanion <subrahmanion.pradeep@gmail.com>
Cc: Matthew Garrett <mjg@redhat.com>, rpurdie@rpsys.net,
        FlorianSchandinat@gmx.de, akpm@linux-foundation.org,
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Date: Tue, 20 Mar 2012 11:55:37 +0800
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Hi Pradeep, 

於 一，2012-03-19 於 17:03 +0530，Pradeep Subrahmanion 提到：
> > For the maximum level causes blank screen...
> > 
> > Please kindly help to identify which driver handle the brightness
> > change, run the following 2 commands:
> > 
> > # echo 5 > /sys/class/backlight/acer-wmi/brightness 
> > # echo 5 > /sys/class/backlight/intel_backlight/brightness 
> > 
> > Which one works to change brightness on your machine?
> 
> 	Both  of them do not work for me.Only hot keys are working. 
> 
> Writing to /sys/class/backlight/acer-wmi/brightness 
> 
> and /sys/class/backlight/intel_backlight/brightness do not cause any 
> 
> change in brightness.
> 
> 
> Regards , 
> 
> Pradeep Subrahmanion

A bit strange...

Could you please paste your /proc/cmdline ? Did you add
acpi_osi="Linux" ?


Thanks a lot!
Joey Lee