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-   -   Backlight change = hard freeze (http://www.nvnews.net/vbulletin/showthread.php?t=165890)

vilgefortz 09-04-11 02:57 PM

Backlight change = hard freeze

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?

Lukas Hejtmanek

spanommers 09-17-11 06:35 PM

Re: Backlight change = hard freeze
Before stumbling on this thread, I posted in another thread. You might have some luck with pci=noacpi


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