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

[JeanAustinR]

Adding acpi_backlight=vendor in my grub.cfg does not fix it. After a
restart, the screen brightness still does not respond. Full birghtness
and it's hurting my eyes. Grrr....!

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