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Old 09-04-11, 03:57 PM   #1
vilgefortz
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Join Date: Aug 2011
Posts: 2
Default Backlight change = hard freeze

Hi,

I have Lenovo T420 with Nvidia NVS4200 and Intel graphic. I use Nvidia only with binary drivers 280.13 (x86_64). I have vanila kernel 2.6.39. If I load nvidia kernel driver and touch brightness keys (fn + home or end) or touch /sys/class/backlight/acpi_video0/brightness via echo, my system locks up completely.

Is this a known problem? Is there any workaround?

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Lukas Hejtmanek
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