[Bug 65601] Lenovo T440s backlight step too large on kernel v3.13 with intel_backlight
bugzilla-daemon at bugzilla.kernel.org
bugzilla-daemon at bugzilla.kernel.org
Wed Jan 22 22:22:09 PST 2014
https://bugzilla.kernel.org/show_bug.cgi?id=65601
--- Comment #21 from Jani Nikula <jani.nikula at intel.com> ---
If the /sys/class/backlight/intel_backlight/brightness interface works fine and
supports as many brightness levels as you like, this is not a bug in i915.
If you're using acpi_backlight=vendor kernel parameter, I believe ACPI video in
3.13 will only report the backlight keys to userspace, and won't change the
brightness. Aaron, is this correct? In this case, it's also not a bug in ACPI
video.
I think what's left is userspace.
Aaron, any other things to check?
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