[Bug 568611] Re: Screen brightness control fails on Dell Studio 1558

[Kevin Hester]

I tried acpi_backlight=video also and it was no good.  Let me know if
you want additional debug info (even to the point of letting you ssh
into my machine if you want.

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Screen brightness control fails on Dell Studio 1558
https://bugs.launchpad.net/bugs/568611
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