Subject : 2.6.38-rc2: acpi backlight control missing
Submitter : Thomas Meyer <firstname.lastname@example.org>
Date : 2011-01-22 10:49
Message-ID : email@example.com
References : http://marc.info/?l=linux-kernel&m=129569353414755&w=2
This entry is being used for tracking a regression from 2.6.37. Please don't
close it until the problem is fixed in the mainline.
Author: Zhang Rui <firstname.lastname@example.org>
Date: Mon Dec 6 15:04:21 2010 +0800
ACPI video: remove output switching control
First-Bad-Commit : 677bd810eedce61edf15452491781ff046b92edc
I can confirm this, modpring video and output.ko doesnt activate the /proc/acpi/etc... brightness device.
this is with a hp pavilion dv7 and kernel Linux hydra 2.6.38-020638rc3-generic #201102010912 SMP Tue Feb 1 09:14:19 UTC 2011 x86_64 GNU/Linux
Please test the patch in bug #27702.
i patched kernel 2.6.38 rc4 stock with the aforementioned patch, backlight works now as expected, great job :)
Thank you for reporting your issue.
*** This bug has been marked as a duplicate of bug 27702 ***
Or more exactly testing the patch.