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#1 2014-06-23 14:35:00

Vortico
Member
Registered: 2013-07-30
Posts: 1

Backlight on Macbook not recognized on kernel 3.15.1

On kernel 3.15.1, nothing is in the folder /sys/class/backlight/ so xbacklight does not work.
Since downgrading to kernel 3.14.6, the file /sys/class/backlight/intel_backlight exists so xbacklight works just fine.

Is this happening to anyone else? Do I need to explicitly specify a kernel module now?

Last edited by Vortico (2014-06-23 14:35:34)

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#2 2014-06-28 20:53:30

1001sd
Member
Registered: 2014-06-28
Posts: 2

Re: Backlight on Macbook not recognized on kernel 3.15.1

I'm having this problem too, also a macbook, model 3,1 with a intel GMA X3100. After suspending with pm-suspend the backlight does also not work (I'm not sure if the screen goes black or the light just turns off).
Looking in dmesg doesn't show anything that I find suspicious, but maybe I'm just not good enough digging.
For now I'm just adding linux to the IgnorePkg line and waiting. Maybe one day I'll try to see if I can find out more.

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#3 2014-07-11 09:33:19

1001sd
Member
Registered: 2014-06-28
Posts: 2

Re: Backlight on Macbook not recognized on kernel 3.15.1

It is working again in kernel 3.15.5-1.

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