brightness function doesn't work

[almusalimalmusalimah]

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

[marja]

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

[sunnyjohn]

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

[doktor5000]

Acer 5739G - brightness controls work out-of-the box.

[isadora]

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

Helped me out, thanks!!!

Acer 7750

[almusalimalmusalimah]

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

[isadora]

Used MCC -> Boot -> Set up boot system -> Next -> Modify

[doktor5000]

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.