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Linux - Laptop and Netbook Having a problem installing or configuring Linux on your laptop? Need help running Linux on your netbook? This forum is for you. This forum is for any topics relating to Linux and either traditional laptops or netbooks (such as the Asus EEE PC, Everex CloudBook or MSI Wind).

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Old 08-24-2007, 03:11 PM   #1
leibnizster
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Registered: Aug 2007
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brightness controls don't work on HP laptop


as the title says...

does anyone have any idea how this can be fixed? The brightness buttons (Fn+F7-8) don't generate any key codes (as opposed to some other function keys which do). I guess this must be an ACPI problem. The laptop model is HP dv6450 and I'm running PCLinuxOS (it has ACPI enabled for battery, proc. throttling etc., but I doesn't have options for brightness control). So basically the LCD is on maximum intensity all the time and it is really annoying and battery consuming. I'm pretty much in a slump...so, any help is greatly appreciated.

Thanks
 
Old 08-24-2007, 04:30 PM   #2
BogusTrumper
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Getting those keys to work is a pain. In the meantime, try kpowersave. There are options in there for changing the screen brightness on lots of models. Clunkier than using the keys, but it'll help for extending battery life (assuming it works for you; works great on my Asus laptop).

Last edited by BogusTrumper; 08-24-2007 at 04:34 PM.
 
Old 08-25-2007, 03:46 AM   #3
leibnizster
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KPowerSave doesn't work for brightness control...it says it's not supported by the hardware. The only solution is to reboot in windows, adjust brightness and boot back, but it's rather annoying. There's gotta be a way to do this.
 
Old 09-02-2007, 06:34 PM   #4
leibnizster
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Talking

problem solved by recompiling the kernel. I don't really know what the default PCLinuxOS kernel misses, but I enabled all ACPI related and backlight related functions and it works like a charm now (2.6.22.6)
 
Old 09-12-2012, 12:54 PM   #5
adrian_m
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Leibnizter, how did you do that? I'd like to try the same for mine, although I'm running peppermint 3.
 
  


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