Kernel Bug Tracker – Bug 43221
ACPI Backlight support reported when not present
Last modified: 2012-05-15 02:19:57 UTC
After this commit ( found with bisect ) , nouveau refuses to control backlight because kernel reports it to be controlled by ACPI even if it isn't
This happens on SONY VAIO VPCF12Z1E
ea9f8856bd6d4ed45885b06a338f7362cd6c60e5 is the first bad commit
Author: Igor Murzov <email@example.com>
Date: Fri Mar 30 21:32:08 2012 +0400
ACPI video: Harden video bus adding.
It is always better to check return values, so add some new checks and
correct existing ones.
v2: Be consistent and don't mix errors from -E* and AE_* namespaces.
Signed-off-by: Igor Murzov <firstname.lastname@example.org>
Signed-off-by: Len Brown <email@example.com>
:040000 040000 aae58fd9e4c1f8216e00ff3236c72ed20220f2bd 466e3008e5e44c7976a49c59f0226ccb91d3c2f9 M drivers
acpi_video_backlight_support() is the failing function after this commit
please attach the acpi dump output of your laptop.
Created attachment 73237 [details]
(ACPI video: Harden video bus adding.)
also caused bug 43168,
so close the newer bug as a duplicate of the older one...
*** This bug has been marked as a duplicate of bug 43168 ***