Two issues on Dell Latitude E5470

[PXNDAE36]

1. Error booting up error: no module found... (or something similar). Doesn't really affect the machine as far as I know. I just press a key and it boots up normally.

2. INTERNAL MIC NOT WORKING This is a bummer for me. I got my mic working on Arch Linux by installing pulseaudio and I am not sure if I could do something similar on chromeOS. I've looked at other issues but still haven't been able to fix it.

Thanks in advance and thank you sebanc for this awesome project.

[ameyjoshi3068]

Hi, Your first issue seems to be related to grub entry. removing rmmod tpm from the first line should fix this issue.

[sebanc]

Hi,

ameyjoshi3068 solution is correct for 1.

For 2. it seems the first 5.4 kernel build introduced a regression wrt microphone, I have sent you a github email invite to the "brunch-testing" repo, could you validate it and try the build there ?

If microphone still does not work, could you try to add a space and "options=internal_mic_fix" to your grub config after "cros_debug" ?

[PXNDAE36]

Hey,

Thanks ameyjoshi3068, that fixed it.

sebanc how should I try the build. Would I use this command: sudo chromeos-update -f or would I have to remake the .img?

[sebanc]

Yes you can use chromeos-update -f

[PXNDAE36]

Hey sebanc,

Got an error: bash: chromeos-update: command not found

[sebanc]

did you use sudo ?

[PXNDAE36]

Oops, just tried it with sudo and got another error: Brunch release archive not found

Should I cd to Downloads and try it?

PS: I extracted it

[sebanc]

You don't need to extract the archive.

run: sudo chromeos-update -f ~/Downloads/<archive_name>

[PXNDAE36]

Tried the brunch testing repo which, unfortunately, didn't solve the microphone. I am going to try the options=internal_mic_fix in grub config.

[PXNDAE36]

Nope, no luck sebanc. I've got the options=internal_mic_fix after cros_debug but it still doesn't work.

[PXNDAE36]

@sebanc ?

[sebanc]

I needed to think about it, here are my 2 last ideas to hopefully fix this:

1)You would need to find your sound card model at: https://www.kernel.org/doc/html/latest/sound/hd-audio/models.html

And add options snd_hda_intel model=[YOUR_MODEL] to /etc/modprobe/alsa.conf

It works the same on linux, you can also browse the linux forums to find the correct model, an example with a different DELL device (in the first comment): https://www.linuxquestions.org/questions/linux-laptop-and-netbook-25/internal-microphone-not-working-debian-squeeze-dell-latitude-e6410-854320/

2) Try the "disable_intel_hda" option (chances that it will work are very low)

[PXNDAE36]

Holy shit!

I followed sebanc's advice but it didn't work. I didn't want to give up so using my knowledge of Arch I dug around and tried dmesg | grep snd. Voila! My codec showed up. So I knew chromeOS was picking it up, but how should I enable it? I then remembered the alsamixer command. I try it and it works. Okay, only one option. winkey + F6 and changed the card to HDA Intel PCH. Now we're talking. winkey + F4 to see capture devices and go to internal mic. DISABLED. FRICKING DISABLED! Smash space bar, capture is now on. Head over to https://www.onlinemictest.com/ and yes! It works.

I am not closing this yet as I am still somewhat researching this as I have the internal_mic_fix option. I'll try to remove it and see if it works.

[PXNDAE36]

After removing internal_mic_fix, the mic still works but with one issue: You have to change the capture to mic after reboot. This might be a one-off though.

[sebanc]

What's the output of "aplay -l" ?

Could you post a screen capture of the alsamixer page where you have to unmute the mic ?

[PXNDAE36]

aplay -l: card 0: PCH [HDA Intel PCH], device 0: ALC3235 Analog [ALC3235 Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 7: HDMI 1 [HDMI 1] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 8: HDMI 2 [HDMI 2] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 9: HDMI 3 [HDMI 3] Subdevices: 1/1 Subdevice #0: subdevice #0 card 0: PCH [HDA Intel PCH], device 10: HDMI 4 [HDMI 4] Subdevices: 1/1 Subdevice #0: subdevice #0

After reboot.

[sebanc]

Instead of switching manually the microphone state, does amixer -q -c 0 set "Internal Mic" toggle has the same effect ?

[PXNDAE36]

Yup, amixer -q -c 0 set "Internal Mic" toggle does do the same thing.

[sebanc]

That's exactly the command in "internal_mic_fix" so I don't understand why it does not work... could you post a dmesg while "internal_mic_fix" is enabled ? (Run "dmesg > ~/Downloads/dmesg.txt" and post dmesg.txt from your Downloads folder)

[PXNDAE36]

dmesg.txt Here ya go. Mic is enabled btw.

[sebanc]

options=internal_mic_fix is not present on the kernel command line (3nd line of the log), do you run sudo update-grub after modifying your grub config ?

[PXNDAE36]

I removed it to see if mic still worked. It did and I didn't add it again. Do I need it and what does it do?

[sebanc]

No pb, as long as it works, I guess it is ok