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#1 2015-06-10 22:30:31

jting
Member
Registered: 2014-10-24
Posts: 11

[SOLVED] No outputs have backlight property

EDIT: Please remove this thread if necessary. Turns out I hadn't yet installed my intel xf86 drivers after thinking I had.

Hi,

I recently set up arch on my Sony Vaio Pro 13, and everything is up and running bar being able to set my screen brightness using xbacklight. Here is where I am at so far:

- Any xbacklight operations give me the 'No outputs have backlight property' message
- My /sys/class/backlight/intel_backlight/brightness file exists
- I can force brightness changes by using 'tee /sys/..../brightness <<< value, where value is any valid brightness I wish to set
- I created (from the template, using Xorg :0 -configure or something) a new xorg.conf and tried to use the workaround with settng the Backlight property with the following options:

Section "Device"
    Identifier "Card0"
    Driver "intel"
    Option "AccelMethod"    "sna"
    Option "Backlight"         "intel_backlight"
    BusID  "PCI:0:2:0"

But when I try to start X, the xorg.conf gives me issues, telling me:
Warning, couldn't open module intel
UnloadModule: intel
Unloading intel

How do I resolve this issue so that I can use xbacklight normally? Thanks.

Last edited by jting (2015-06-10 22:35:31)

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