Package: src:linux Version: 3.2.39-2 Severity: normal Tags: upstream Hi,
Since Linux 3.7, the brightness hotkeys work on this laptop. Initially I thought that this support was added by a specific plateform driver commit but after diving in git log it didn't make any sense about why these hotkeys worked in 3.7 so I started to bisect in order to find the culprit. Here it is: >From d627b62ff8d4d36761adbcd90ff143d79c94ab22 Mon Sep 17 00:00:00 2001 From: Lekensteyn <lekenst...@gmail.com> Date: Mon, 25 Jun 2012 22:36:24 +0000 Subject: i915: initialize CADL in opregion This is rather a hack to fix brightness hotkeys on a Clevo laptop. CADL is not used anywhere in the driver code at the moment, but it could be used in BIOS as is the case with the Clevo laptop. The Clevo B7130 requires the CADL field to contain at least the ID of the LCD device. If this field is empty, the ACPI methods that are called on pressing brightness / display switching hotkeys will not trigger a notification. As a result, it appears as no hotkey has been pressed. Reference: https://bugs.freedesktop.org/show_bug.cgi?id=45452 Tested-by: Peter Wu <lekenst...@gmail.com> Signed-off-by: Peter Wu <lekenst...@gmail.com> Acked-by: Jesse Barnes <jbar...@virtuousgeek.org> Signed-off-by: Daniel Vetter <daniel.vet...@ffwll.ch> Well, after this result I was puzzled because it seemed to be a Clevo specific issue but I decided to give it a try and effectively it gave me the expected behavior, so please could you add it in the next Wheezy upload? Also this should probably be forwarded to sta...@vger.kernel.org with a revised commit message stipulating that not only Clevo laptop are affected, don't know if it is possible though. Cheers, Vincent -- System Information: Debian Release: 7.0 APT prefers testing APT policy: (990, 'testing'), (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 3.2.40+ (SMP w/4 CPU cores) Locale: LANG=fr_FR.utf8, LC_CTYPE=fr_FR.utf8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash -- To UNSUBSCRIBE, email to debian-bugs-dist-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
