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Old 03-18-2015, 05:07 PM   #1
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Can't adjust brightness with function key and can't adjust brightness after suspend.


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
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"

I also tried this workaround

Neither of them worked

When I run
ls /sys/class/backlight
I get
intel_backlight  toshiba

Any help would be greatly appreciated!
Old 03-18-2015, 10:44 PM   #2
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Hi, there

This post may help,see floor #9

Deepin Forum • 为了笔记本能调节亮度,装了kde……
Old 03-19-2015, 11:46 AM   #3
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This post may help,see floor #9

Deepin Forum kde
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


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