Heads up: Bug 1169984 will cause audio problems, especially HDMI

[Pete Graner]

David,

We've created a release note task in the bug. Please add the actual
release not text in the bug and we will ensure it gets into the
release notes.

Thanks

~pete

On Thu, Apr 25, 2013 at 9:33 AM, David Henningsson
<david.henningsson at canonical.com> wrote:
> Hi Kernel & Release team,
>
> I'm wondering if this bug below should be release noted, and if so, how to
> do it.
>
> It seems to hit quite a few machines - it's got 10 duplicates just in the
> short amount of time the bug has been present and has the potential to knock
> out audio in *a lot* of machines.
>
>
> -------- Original Message --------
> Subject: [Ubuntu-audio-dev] Heads up: Bug 1169984 will cause audio problems,
> especially HDMI
> Date: Thu, 25 Apr 2013 08:43:32 +0200
> From: David Henningsson <david.henningsson at canonical.com>
> To: Ubuntu Audio Developers <ubuntu-audio-dev at lists.launchpad.net>
>
> Unfortunately a bug causing kernel memory corruption slipped into the
> released 13.04 kernel. It is caused by a last-minute patch we backported
> to try to improve HDMI audio support for Haswell, so upstream kernels
> are unaffected.
>
> Since it's memory corruption, several symptoms can appear, but the most
> common seem to be:
>
>  * Sound card fails to load at all. Dmesg shows an oops in
> patch_generic_hdmi
>
>  * Sound card loads, but any attempt to access it fails with -19 or
> -ENODEV.
>
> This concerns HDA Intel cards that have HDMI codecs. Depending on
> hardware layout, sometimes analog audio and HDMI audio are two codecs on
> the same card, in which case analog audio can be affected too.
>
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1169984
>
>
> --
> David Henningsson, Canonical Ltd.
> https://launchpad.net/~diwic
>
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--
Pete Graner - Release Engineering & QA Team Manager - <pgraner at canonical.com>
Canonical Ltd. - http://www.canonical.com/