NAK: [Quantal] [Precise SRU] drm/radeon: fix unintended display toggles

[Tim Gardner]

On 02/05/2013 12:06 PM, Alex Hung wrote:
> SRU Justification:
>
> Impact:
>    An additional KEY_SWITCHVIDEOMODE keycode is sent with when
>    brightness up/down hotkey are pressed on some systems with AMD's
>    VGA chips. It toggles displays unintendedly when multiple monitors
>    are connected or causes LCD panel flickers with no external monitors.
>
> Fix:
>    The standard video events may be overloaded for device specific
>    purposes. For example AMD ACPI interface overloads
>    ACPI_VIDEO_NOTIFY_PROBE (0x81) to signal AMD-specific events.
>    This patch gives the handlers the chance to examine the event and
>    block the keypress if the event is device specific.
>
> Test:
>    I tested on ASUS 1015U, and it removed the additional keycode.
>
> Note:
>    The patches are included in upstream, but it is needed to be included
>    in precise lts-backport-quantal and quantal kernels:
>
>    92fdf89aa95de32dba1cb44fe7f5c54824b4b2c4
>    8a37c65df9dcbd1c891df2b4a94157999b654841
>
>    A number of previous commits are also required:
>
>    c49170742d6928b16fb3839b47a94cc41630dbe0
>    fda4b25c55a59ba12378e4b9e4553f6ea57d802d
>    ce3cf821a31f9824eda788cbd3e710d8047e82df
>    fd64ca8a9d9d7e92fc81fe0b23dcf324246fd356
>    86504672f7d79986a8ef618fb120044220e3d1eb
>    f3728734ba78310525bf4a361c7787c7c6fa5d40
>    910308802c528f8afe864b694d5456fedd0bb18f
>    af7912e57316caa1b705f06b03592cec0737cb36
>    efd4e418f2bb8a8b21f96fd44e775eaf6dd55905
>    9e05b2f49eb9484e857e9b6c70dea3bbbe564290
>
> BugLink: http://bugs.launchpad.net/bugs/1110219
>

Use 'git cherry-pick -x' when applying patches from Linus' repo. If you 
have to make _any_ changes when applying the patch, then change the 
commit log from 'cherry picked' to 'backported'.

Finally, with this many patches I want a proper pull request.

rtg
-- 
Tim Gardner tim.gardner at canonical.com