Re: 2.6.30 -> Brightness does not work
On Friday 21 August 2009 17:04:43 Boyd Stephen Smith Jr. wrote:
> In <email@example.com>, Thierry Chatelet wrote:
> >I found that:
> >~$ dmesg |grep brightness
> >[ 26.758710] ACPI Error (video-0537): Current brightness invalid
> > 
> That looks like either the kernel is reading from the wrong place or the
> hardware is providing the wrong value. You might want to follow up with
> some kernel hackers.
> >What to do now?
> You might try reading/setting some of these values:
> Perhaps it will work if your brightness is less than the max_brightness.
I don't have a backlight folder there!!
As for brightness_switch_enabled, it says "y", so i guess it's OK.
When the laptop starts, it seems to me that the brightness is set as a random
value, sometime very bright, sometimes very dime.
I searched that:
dmesg |grep video
[ 7.017030] acer-wmi: Brightness must be controlled by generic video driver
[ 26.973449] ACPI Error (video-0537): Current brightness invalid 
A web search on acer-wmi gave me:
where the developer ask for direct information from people having trouble with
this module. So I will contact him directly and let the list know about the