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indio
n00b
Joined: 13 Mar 2013
Posts: 22
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 Posted: Sun Mar 24, 2013 10:58 pm Post subject: Brightness control without DE |
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Hi everyone,
I've got an Intel Atom netbook, so I can only get decent performance if I run a window manager without a DE.
This has been fine, except when it comes to brightness control.
From my efforts googling there should be either a /sys/class/backlight/acpi_video0/brightness file, or /proc/acpi/video/VGA/LCD/brightness for me to mess with. But /sys/class/backlight is an empty folder, and /proc/acpi/video doesn't exist.
Then I was told to run xbacklight -set 100 which returns | Code: | | RANDR Query Version returned error -1 |
Finally I was told to mess around with xrandr, but that simply returns Can't open display, even when run as root.
Any ideas on how to get this working? Thanks a ton. |
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Ant P.
Watchman
Joined: 18 Apr 2009
Posts: 6920
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| Posted: Mon Mar 25, 2013 1:17 am Post subject: |
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| Your kernel doesn't have the correct backlight driver enabled, therefore you can't change the backlight from userspace. |
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indio
n00b
Joined: 13 Mar 2013
Posts: 22
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| Posted: Mon Mar 25, 2013 2:00 am Post subject: |
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| Got it. Any way of knowing what driver I need or if there even is an appropriate driver for my hardware? |
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