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Bug#701148: linux-image-3.7-trunk-amd64: Regression - brightness controls do not work.



Summary:

3.2.0-4-amd64 (Wheezy): Brightness controls work, get a popup indicator showing the brightness should be changing, dmesg says ACPI fails to switch the brightness.

3.6-trunk: Brightness controls work, get a popup indicator showing the brightness should be changing, dmesg says ACPI fails to switch the brightness.

3.7-trunk: Brightness controls do nothing, no popup indicator, no ACPI failures about brightness in dmesg.

3.7-trunk+video.allow_duplicate=1: Brightness controls cause a popup indicator showing brightness should be changing, but the brightness doesn't change. no ACPI failures about brightness in dmesg.

3.6-trunk+video.allow_duplicate=1: Brightness controls cause a popup indicator showing brightness should be changing, but the brightness doesn't change. dmesg says ACPI fails to switch the brightness.


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