Can't adjust brightness with function key and can't adjust brightness after suspend.

QuarkDev · 03-18-2015, 04:07 PM

Hello,

I recently installed Deepin 2014.2 on my Toshiba Portege Z935-P300. Everything has been working great so far except for this little problem with the brightness. I am able to change the brightness in the control center but not after a suspend.

In /etc/default/grub
I changed

Code:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash

"
to

Code:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

I also tried this workaround

Neither of them worked

When I run

Code:

ls /sys/class/backlight

I get

Code:

intel_backlight  toshiba

Any help would be greatly appreciated!

cyio · 03-18-2015, 09:44 PM

This post may help,see floor #9

Deepin Forum • 为了笔记本能调节亮度，装了kde…… http://www.linuxdeepin.com/forum/6/27381?#p136153

QuarkDev · 03-19-2015, 10:46 AM

Quote:

This post may help,see floor #9

Deepin Forum kde http://www.linuxdeepin.com/forum/6/27381?#p136153

When I try this method I get the following message when I boot my computer "error: malformed file
press any key to continue.." and I an unable to change the brightness at all.

I reverted back to the previous backlight_helper and now the error message is gone but I am still unable to change the brightness, even through the control center