[yocto] [meta-raspberrypi][PATCH] make sound work out of the box for raspberrypi2

[Andreas Müller]

On Mon, Mar 23, 2015 at 10:43 PM, Gary Thomas <gary at mlbassoc.com> wrote:
> On 2015-03-23 14:57, Andreas Müller wrote:
>>
>> On Mon, Mar 23, 2015 at 4:59 PM, Gary Thomas <gary at mlbassoc.com> wrote:
>>>
>>> On 2015-03-22 14:21, Andreas Müller wrote:
>>>>
>>>>
>>>> Signed-off-by: Andreas Müller <schnitzeltony at googlemail.com>
>>>> ---
>>>>    ...-during-boot-by-compiling-SND_BCM2835-int.patch | 38
>>>> ++++++++++++++++++++++
>>>>    recipes-kernel/linux/linux-raspberrypi_3.18.bb     |  8 +++--
>>>>    2 files changed, 43 insertions(+), 3 deletions(-)
>>>>    create mode 100644
>>>>
>>>> recipes-kernel/linux/linux-raspberrypi/0001-start-sound-during-boot-by-compiling-SND_BCM2835-int.patch
>>>
>>>
>>>
>>> I tried this patch (which downloaded very strangely using Thunderbird)
>>> and
>>> the
>>> kernel rebuilt fine.  I now have the audio detected, but still no sound
>>> :-(
>>> Again I've tried the internal (phono) speakers as well as HDMI audio.
>>>
>>> Just to prove a point on the [brand new] hardware, I installed OpenELEC
>>> (XBMC)
>>> and it works fine using the HDMI audio.  Sadly when I tried Raspbian and
>>> Ubuntu
>>> there was no sound either...
>>>
>>> Were you (Andreas) able to get any sound with this patch?
>>>
>> Yes but I have used 3.5mm sound output - Should have mentioned that in
>> commit. I guess there is to enable something else in kernel config for
>> HDMI. Will look into that
>
>
> I've tried the 3.5mm jack as well but nothing seems to come out.
> I even tried booting with the HDMI missing (powered off) in case
> that was causing some confusion.
>
> Did you make any changes to config.txt to get this going?
No
>
Have my standard xfce-image with xfce4-mixer and as mentioned out of
the box: I can hear sound / change volume...

What does happen if you start alsamixer - if it is installed on your image?

Andreas