Re: Acer Chromebook 15 CB3-532 Debian Testing microphone not working

[Alexander van der Leun <alex@vdleun.net>]

On Tue, Nov 09, 2021 at 02:49:55PM +0100, Alexander van der Leun wrote:
> Hi Dekks Herton,
> 
> On Tue, Nov 09, 2021 at 05:44:08AM +0000, Dekks Herton wrote:
> > 3 - This Chromebook uses an old Intel CPU based on Braswell which Intel recently
> > rewrote the sound driver to use Intel_captpt driver. Is the soundcard
> > using captpt or snd_hda_intel?
> 
> The soundcard uses snd_hda_intel. The current kernel 5.14.0-2-amd64 seems not to
> have a module named captpt. Where can I read more about this rewrite? A Google
> search doesn't seem to come up with much.

Found the mentioned driver, snd_soc_catpt, but cannot seem to get it to work.
Also blacklisted the snd_hda_intel and rt5650 drivers. But still no output
in the kernel logs or aplay -l finding sound cards.

Does this driver really work on this hardware:

# lshw
linuxbook                   
    description: Laptop
    product: Banon
    vendor: GOOGLE
    version: 1.0
    width: 64 bits
    capabilities: smbios-3.3.0 dmi-3.3.0 smp vsyscall32
    configuration: boot=normal chassis=laptop family=Intel_Strago
  *-core
       description: Motherboard
       product: Banon
       vendor: GOOGLE
       physical id: 0
       version: 1.0
     *-firmware
          description: BIOS
          vendor: coreboot
          physical id: 0
          version: MrChromebox-4.14
          date: 07/25/2021
          size: 1MiB
          capacity: 8MiB
          capabilities: pci pcmcia upgrade bootselect acpi
     *-cpu
          description: CPU
          product: Intel(R) Celeron(R) CPU  N3060  @ 1.60GHz
          vendor: Intel Corp.
          physical id: 4
          bus info: cpu@0
          version: 6.76.4
          slot: CPU0
          size: 580MHz
          capacity: 2480MHz
          width: 64 bits
          capabilities: fpu fpu_exception wp vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp x86-64 constant_tsc arch_perfmon pebs bts rep_good nopl xtopology tsc_reliable nonstop_tsc cpuid aperfmperf tsc_known_freq pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm sse4_1 sse4_2 movbe popcnt tsc_deadline_timer aes rdrand lahf_lm 3dnowprefetch epb pti ibrs ibpb stibp tpr_shadow vnmi flexpriority ept vpid tsc_adjust smep erms dtherm ida arat md_clear cpufreq
          configuration: cores=2 enabledcores=2 microcode=1041 threads=2