Public bug reported:
Newer Thinkpads have 16 levels of backlight control, but thinkpad-acpi
is unable to provide most of them. This makes it impossible to set full
brightness. The ACPI video interface provides full access to them, and
so thinkpad-acpi should refuse to bind in the case of the video
extension being present.
** Affects: linux-source-2.6.22 (Ubuntu)
Importance: Undecided
Status: New
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Thinkpad-acpi controls backlight poorly on new Thinkpads, prevents maximum
brightness
https://bugs.launchpad.net/bugs/148055
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