From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@freedesktop.org
Subject: [Bug 75917] New: backlight switches of when starting X since
kernel-3.13
Date: Sat, 08 Mar 2014 19:17:40 +0000
Message-ID:
Priority
medium
Bug ID
75917
Assignee
dri-devel@lists.freedesktop.org
Summary
backlight switches of when starting X since kernel-3.13
Severity
normal
Classification
Unclassified
OS
All
Reporter
nl@gnuffy.net
Hardware
Other
Status
NEW
Version
XOrg CVS
Component
DRM/Radeon
Product
DRI
After updating from linux 3.12.8 to 3.13 my display backlight
switches off when starting X.
The kernel doesn't crash, it just switched off the backlight.
Hardware name: Acer Aspire 3820T/JM31_CP, BIOS V1.19 10/27/2010
This is a notebook with an intel/radeon hybrid graphics.
I use intel for my X. I report this as radeon problem because
git bisect (on linux-stable tree) showed the following commit
as the cause of my problem:
10ebc0bc09344ab6310309169efc73dfe6c23d72 is the first bad commit
commit 10ebc0bc09344ab6310309169efc73dfe6c23d72
Author: Dave Airlie <airlied at redhat.com>
Date: Mon Sep 17 14:40:31 2012 +1000
drm/radeon: add runtime PM support (v2)
This hooks radeon up to the runtime PM system to enable
dynamic power management for secondary GPUs in switchable
and powerxpress laptops.
v2: agd5f: clean up, add module parameter
Signed-off-by: Dave Airlie <airlied at redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Please let me know if you need addititonal information.