[SRU][Focal][OEM-5.6][PATCH 0/1] No sound, Dummy output on Acer Swift 3 SF314-57G with Ice Lake core-i7 CPU

Stefan Bader stefan.bader at canonical.com
Wed Jul 29 07:46:38 UTC 2020

On 29.07.20 06:25, Hui Wang wrote:
> BugLink: https://bugs.launchpad.net/bugs/1877757
> This patch is already in the 5.8-rc1, so it is already in the Groovy kernel.
> I thought this patch will be merged to ubuntu kernel with stable patches,
> but today a ubuntu user pushed me to do sth to let this patch be merged
> to ubuntu kernel asap, so I send this SRU.

This is no argument for SRU. Either you are behind this and decided that there
is little enough risk and enough benefit to go ahead or you push back at the
user if there is good arguments against. What I try to say, we do get told by
users (or PMs). They can ask but it is us making the decisions.

> [Impact]
> On this machine, after booting up, there is no valid sound card, the
> gnome-control-center shows a dummy output only. check the dmesg, the alsa
> sof driver fails to initialize.
> [Fix]
> Backport a patch from upstream, after applying this patch, the sof driver
> will not fail anymore even the codec driver is hda_generic
> [Test Case]
> A couple of users already test this patch on their machines, after booting
> up, there is a valid sound card, and could output sound from output devices.
> [Regression Risk]
> Low, this is cherry-picked from upstream, and this just adds a new kind of
> codec (generic) support, and a couple of ubuntu users already verified this
> patch.

Technically this looks ok but the bug report misses proper status (and
importance settings). Please fix this.

> Kai Vehmanen (1):
>   ASoC: SOF: Intel: hda: fix generic hda codec support
>  sound/soc/sof/intel/hda-codec.c | 51 +++++++++++++++++++++++++++++----
>  1 file changed, 45 insertions(+), 6 deletions(-)

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