No audio card found on Dell Venue 8 Pro 5830

[unicav]

I have Debian Stretch installed on my Dell Venue 8 Pro 5830. With the firmware packages for the ath6k wifi and the intel audio.
Wifi is working fine, touch screen and on screen keyboard are fine.
I can not get anything for the sound card. Sound in control panel shows a dummy output only.
lspci and lsusb show nothing about a sound card.
I've followed instructions from many sources on the net to install the 5640 UCM files, and running lsmod I do see various modules for the Intel SST and the RT5640.
inxi -Fx show no sound card detected.
alsactl store says no soundcard found so there's no asound.state being created.
I've been hacking away at this for days looking for any kind of clue why nothing can find the card. Any suggestions would really be appreciated.

EDIT - Just checked the BIOS again and the audio device is listed as a Realtek ALC 3261
so far nothing good coming up on that in searches

[Segfault]

Note, lspci will show all enabled PCI hardware. Regardless whether your OS has drivers for it or not. No show in lspci - no hardware present. Meaning it is disabled in BIOS or faulty.

Edit 1: That said, I really do not know how your sound hardware is connected, it may be some weird SoC sound card. In this case you need to build custom kernel with this particular SoC device enabled. If you are lucky and it is supported, that is.

Edit 2: Some info here: https://01.org/linuxgraphics/gfx-docs/drm/sound/soc/

[stevepusser]

Dells can have different hardware installed. Please let us know exactly you have by installing inxi, updating your hardware ID database as root or with sudo: (usually helps improve cryptic output like "Intel device 19f0:foo1")

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update-pciids
update-usbids

and then copypasting the output of

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inxi -Fxz

in a code box here.

Newer Intel hardware (sixth gen and above) may need firmware-linux-nonfree and/or a combo of a backported newer kernel and firmware to get the sound to work, for example.

Edit: Oh, it's one of the infamous Bay Trail Atom tablets. Oy vey...

[unicav]

Yep, Infamous BayTrail tablet. Stretch and Gnome are really working well on it. The audio and Bluetooth are all that aren't working.
I have the wifi firmware and all Intel non-free installed. It's showing those as well in lsmod. I blacklisted snd_hdmi_lpe_audio per several threads.
Tons of info gleaned from http://www.studioteabag.com/science/dell-venue-pro-linux

So here's the outputs:
lspci

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00:00.0 Host bridge: Intel Corporation Atom Processor Z36xxx/Z37xxx Series SoC Transaction Register (rev 09)
00:02.0 VGA compatible controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Graphics & Display (rev 09)
00:14.0 USB controller: Intel Corporation Atom Processor Z36xxx/Z37xxx, Celeron N2000 Series USB xHCI (rev 09)
00:1a.0 Encryption controller: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Trusted Execution Engine (rev 09)
00:1f.0 ISA bridge: Intel Corporation Atom Processor Z36xxx/Z37xxx Series Power Control Unit (rev 09)


lsusb
(NOTE Bus 001 is a hub/keyboard/mouse/usbstick all plugged into the port)

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Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 0781:5575 SanDisk Corp. Cruzer Glide
Bus 001 Device 004: ID 046d:c077 Logitech, Inc. M105 Optical Mouse
Bus 001 Device 003: ID 046d:c31c Logitech, Inc. Keyboard K120
Bus 001 Device 002: ID 1a40:0201 Terminus Technology Inc. FE 2.1 7-port Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub


inxi

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System:    Host: Dell-Venue-8-Pro Kernel: 4.9.0-7-686-pae i686 (32 bit gcc: 6.3.0)
           Desktop: Gnome 3.22.3 (Gtk 3.22.11-1)
           Distro: Debian GNU/Linux 9 (stretch)
Machine:   Device: portable System: Dell product: Venue 8 Pro 5830
           Mobo: Dell model: 09RP78 v: X01 UEFI: Dell v: A16 date: 02/27/2018
Battery    BATC: charge: 36.2 Wh 97.7% condition: 37.1/49.8 Wh (74%)
           model: SANYO DELL X1M2Y3BJ status: Discharging
CPU:       Quad core Intel Atom Z3740D (-MCP-) cache: 1024 KB
           flags: (lm nx pae sse sse2 sse3 sse4_1 sse4_2 ssse3 vmx) bmips: 10662
           clock speeds: max: 1832 MHz 1: 1014 MHz 2: 547 MHz 3: 696 MHz 4: 664 MHz
Graphics:  Card: Intel Atom Processor Z36xxx/Z37xxx Series Graphics & Display
           bus-ID: 00:02.0
           Display Server: X.org 1.19.2 drivers: fbdev (unloaded: modesetting,vesa)
           tty size: 87x30 Advanced Data: N/A for root
Audio:     Card Failed to Detect Sound Card! Sound: ALSA v: k4.9.0-7-686-pae
Network:   Card: Failed to Detect Network Card!
Drives:    HDD Total Size: NA (-)
           ID-1: /dev/mmcblk2 model: N/A size: 31.3GB
Partition: ID-1: / size: 27G used: 4.0G (16%) fs: ext4 dev: /dev/mmcblk2p3
           ID-2: swap-1 size: 2.15GB used: 0.00GB (0%) fs: swap dev: /dev/mmcblk2p2
Sensors:   System Temperatures: cpu: 33.0C mobo: N/A
           Fan Speeds (in rpm): cpu: N/A
Info:      Processes: 167 Uptime: 4 min Memory: 343.3/1855.9MB
           Init: systemd runlevel: 5 Gcc sys: N/A
           Client: Shell (bash 4.4.121) inxi: 2.3.5


[Segfault]

In kernel configuration go to Device Drivers > Sound card support > Advanced Linux Sound Architecture > ALSA for SoC audio support

Enable Intel ASoC SST drivers, in submenu enable ACPI HiFi2 (Baytrail, Cherrytrail) Platforms.

(That is, in case it is not enabled in stock kernel.)

[unicav]

Definitely not in the kernel at this time. The tablet would probably never survive a kernel compile.
I'll crank up a Debian VM and recompile a new kernel with that added in and update ASAP.
Thanks!

[stevepusser]

Maybe the newer kernels in Debian backports have that configured? Wait--I have Debian's configuration for it here...nope, can't find it in there or in the Liquorix kernel.

[ulyses]

Sorry for reviving this old thread. I have partially found the solution for the sound with this tablet. If you replace the uploaded file "asound.state" into /var/lib/alsa over asound.state, the audio card will be recognised and you will get sound.

https://drive.google.com/open?id=1sKcWl ... u2jS1C9jzC

The problem is that the settings will be lost after a restart, and I still don't know how to save them. In Fedora I used the command: "su alsactl --file /var/lib/alsa/sound.state restore", but this is not working in Ubuntu 18.04.
Two pieces of hardware are found with this file: "HdmiLpeAudio" and "bytr-rt5640".