Re: Audio issues with broadwell-rt286 on Thinkpad Helix ("firmware ready timeout")

Hi,

On Thu, 15 Sep 2022 05:19:43 +0100
Dekks Herton <[email protected]> wrote:
> 
> With me i couldn't get sound out of the tablet, with standard
> Bullseye, it worked with Buster but then Intel rewrote the
> Haswell/Broadwell audio driver with the new catpt driver which broke
> Bullseye. I raised Debian bug #896822 and this enabled the catpt
> driver and after some work i got the firmware to load and sound from
> the tablet. AFAIK the dmic still didn't work.

Thanks for the pointer!  I think you mean bug #986822, though. :)

> I then moved to testing and everything broke again, for other reasons
> i'm now on EndeavourOS which is arch based and the tablet is without
> speakers or mic as it tries to use the HDA driver on the tablet. 

I found that (on Debian, at least), the catpt driver works if the
IOMMU is disabled.  Debian enables the IOMMU by default for all
devices except Intel GPUs - I don't know about EndeavourOS, but it
might be similar.  You can disable the IOMMU using the option
"intel_iommu=off" on the kernel command line.

I reported Debian bug #1014299, and haven't gotten any response.  I
meant to bring it to the upstream kernel developers, but I've been
distracted. :)

Benjamin