brightness function doesn't work

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brightness function doesn't work

Postby almusalimalmusalimah » Jul 9th, '12, 00:19

hello everyone

i have a new laptop ...... it is ACER 5750z

all things on mageia 2 works fine on that laptop

except brighteness function

so is there anyway to fix this problem

================

if you want some INFO about its specifications

http://support.acer.com/acerpanam/noteb ... Zsp2.shtml
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Re: brightness function doesn't work

Postby marja » Jul 9th, '12, 14:47

almusalimalmusalimah wrote:hello everyone

i have a new laptop ...... it is ACER 5750z

all things on mageia 2 works fine on that laptop

except brighteness function

so is there anyway to fix this problem



There is a similar bug report about an ACER Aspire 5633 and about an ACER Aspire 5740-6491
https://bugs.mageia.org/show_bug.cgi?id=919

However the report confuses me :(
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Re: brightness function doesn't work

Postby sunnyjohn » Jul 10th, '12, 03:50

Acer 5830TG
I added "acpi_osi=Linux" to grub menu entry and brightness controls work.
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Re: brightness function doesn't work

Postby doktor5000 » Jul 11th, '12, 20:21

Acer 5739G - brightness controls work out-of-the box.
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Re: brightness function doesn't work

Postby isadora » Jul 11th, '12, 20:22

sunnyjohn wrote:Acer 5830TG
I added "acpi_osi=Linux" to grub menu entry and brightness controls work.

Helped me out, thanks!!!

Acer 7750
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Re: brightness function doesn't work

Postby almusalimalmusalimah » Jul 12th, '12, 12:09

where is that text file .. and where i add this line

and the more important thing here

is this bug from mageia or from GRUB

and why did the grub involve with this thing while it is OS functions
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Re: brightness function doesn't work

Postby isadora » Jul 12th, '12, 12:37

Used MCC -> Boot -> Set up boot system -> Next -> Modify
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Re: brightness function doesn't work

Postby doktor5000 » Jul 13th, '12, 20:32

almusalimalmusalimah wrote:is this bug from mageia or from GRUB

and why did the grub involve with this thing while it is OS functions


Neither - it's a bug in the ACPI implementation of your machine, as most vendors only optimize/fix those for windows within some windows drivers, but there remain many problems. And you need to tell the kernel to workaround those. And grub configuration is where you hand over kernel boot options. Simple as that.
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