* BUG: kernel-3.13: switch off backlight on Acer 3820TG
@ 2014-01-22 19:02 Nicolai Lissner
0 siblings, 0 replies; only message in thread
From: Nicolai Lissner @ 2014-01-22 19:02 UTC (permalink / raw)
To: David Airlie; +Cc: dri-devel
Hi,
After updating from linux 3.12.8 to 3.13 my display backlight
switches off when starting X. As it seems, 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 only.
I've bisect'd the problem in the linux-stable tree and it says:
10ebc0bc09344ab6310309169efc73dfe6c23d72 is the first bad commit
commit 10ebc0bc09344ab6310309169efc73dfe6c23d72
Author: Dave Airlie <airlied@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@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Please let me know if you need addititonal information.
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2014-01-22 19:02 BUG: kernel-3.13: switch off backlight on Acer 3820TG Nicolai Lissner
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