13.04 lenovo y580 backlight not working

[baddnady23]

I have upgraded to 13.04 on my lenovo y580 and all seems well except I can't get my backlight setting to work. The hotkeys are not working and when I open the backlight settings, there is no way to adjust it. After searching around, I have changed several parameters in the /etc/default/grub and nothing has worked. From reading around it seems as thought it may be a kernel issue??

I have tried

GRUB_CMDLINE_LINUX="acpi_osi=\'!Windows 2012\'"

as well as

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi=\'!Windows 2012\'"

to no avail.

Was wondering if anyone else out there with the same laptop has expericend this issue. It's killing my battery life and I would love to fix it.

[gordintoronto]

Perhaps this might help?
http://linux-on-acer-aspire-5732z.bl...x-mint-11.html

What is the video adapter on your laptop?

[baddnady23]

intel 660m

[ible]

Perhaps this might help?
http://linux-on-acer-aspire-5732z.bl...x-mint-11.html

Thanks! The page was very helpful (at least at the end) -- adding acpi_osi=Linux to the default grub solves the problem.

I used that fact to help me install Ubuntu (13.04) on my Lenovo Y580 (for more details: http://ubuntuforums.org/showthread.p...2#post12710212).

Best--