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

[Kamal Mostafa]

Note to testers:  While investigating this bug, I discovered that
"acpi_backlight=video" is actually non-functional (see LP: #573120).
Even with that problem fixed acpi_backlight=video does not fix the
brightness controls on the Dell Studio laptop.  My investigation
continues.

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