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