[PATCH 0/1][raring] Quirk broken ThinkPad backlights

Seth Forshee seth.forshee at canonical.com
Fri Apr 19 12:59:31 UTC 2013

This is an issue that I've been attempting to fix upstream but has been
stalled for a while now. This quirks the machines to get the backlight
working until a better fix is available.

== SRU Justification ==

Impact: A number of ThinkPad models have a workaround in the ACPI
backlight implementation for Windows 8 that more or less completely
breaks backlight control.

Fix: Add an OSI quirk to no longer claim to be Windows 8 on these
machines, causing the firmware to revert to the older, working behavior.

Test Case: Verified on LP #1098216 and bugzill.kernel.org #51231.

Seth Forshee (1):
  UBUNTU: SAUCE: ACPI: Disable Windows 8 compatibility for some Lenovo

 drivers/acpi/blacklist.c |   70 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 70 insertions(+)

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