Submitted feedback just now on a similar issue on the Acer Chromebook 15 CB515. Connected to an external monitor. No option to switch audio to Chromebook. Disconnected monitor and still no sound. Volume keys do not move the slider. Using the mouse moves slider but no sound.

No internal option.

Deleted: Screenshot 2017-11-09 at 10.13.51 AM.png 23.2 KB

	Screenshot 2017-11-09 at 10.13.51 AM.png 23.2 KB View Download

CBC-RS/TC-watchlist

Looks like an instance of b/67029862

The board name of Acer Chromebook 15 CB515 is sand.

Does anyone know how to find the URL of feedback report? It looks like we need to search by keywords in the feedback?

robby.n.payne@gmail.com: Did you submit a feedback report? If yes, can you provide some keywords in the feedback so we can find the report.

gbrangers45@gmail.com: Please provide some keywords in the feedback so we can find the report.

Feedback was pretty close (not verbatim) to my above comment.

I did have "plugable dock" in the feedback if that helps.

Found the feedback report in #1. Feedback id is 84554497334. I see lots of error "bxt_da7219_max98357a_i2s bxt_da7219_max98357a_i2s: ASoC: CODEC DAI intel-hdmi-hifi1 not registered". Not sure if it's related.

2017-11-09T08:36:08.258470-05:00 INFO kernel: [13640.855041] usbcore: registered new interface driver cdc_ncm
2017-11-09T08:36:08.258497-05:00 ERR kernel: [13640.855254] bxt_da7219_max98357a_i2s bxt_da7219_max98357a_i2s: ASoC: CODEC DAI intel-hdmi-hifi1 not registered
2017-11-09T08:36:08.261466-05:00 INFO kernel: [13640.857805] usbcore: registered new interface driver cdc_wdm
2017-11-09T08:36:08.265481-05:00 ERR kernel: [13640.862022] bxt_da7219_max98357a_i2s bxt_da7219_max98357a_i2s: ASoC: CODEC DAI intel-hdmi-hifi1 not registered
2017-11-09T08:36:08.270075-05:00 ERR kernel: [13640.866715] bxt_da7219_max98357a_i2s bxt_da7219_max98357a_i2s: ASoC: CODEC DAI intel-hdmi-hifi1 not registered
2017-11-09T08:36:08.270421-05:00 WARNING kernel: [13640.867529] evdi: [I] Initialising logging on level 5
2017-11-09T08:36:08.270542-05:00 WARNING kernel: [13640.867735] usb 2-1.1.1: Warning! Unlikely big volume range (=511), cval->res is probably wrong.
2017-11-09T08:36:08.270549-05:00 WARNING kernel: [13640.867747] usb 2-1.1.1: [15] FU [Plugable Audio Playback Volume] ch = 6, val = -8176/0/16
2017-11-09T08:36:08.271536-05:00 WARNING kernel: [13640.868459] usb 2-1.1.1: Warning! Unlikely big volume range (=767), cval->res is probably wrong.
2017-11-09T08:36:08.271549-05:00 WARNING kernel: [13640.868465] usb 2-1.1.1: [12] FU [Mic Capture Volume] ch = 2, val = -4592/7680/16
2017-11-09T08:36:08.273510-05:00 INFO kernel: [13640.870154] usbcore: registered new interface driver cdc_mbim
2017-11-09T08:36:08.273531-05:00 ERR kernel: [13640.870501] bxt_da7219_max98357a_i2s bxt_da7219_max98357a_i2s: ASoC: CODEC DAI intel-hdmi-hifi1 not registered
2017-11-09T08:36:08.275470-05:00 INFO kernel: [13640.871704] usbcore: registered new interface driver snd-usb-audio
2017-11-09T08:36:08.283591-05:00 INFO minijail0[31864]: libminijail[31864]: not running init loop, exiting immediately
2017-11-09T08:36:08.322231-05:00 INFO permission_broker[1236]: ProcessPath(/dev/bus/usb/002/004)
2017-11-09T08:36:08.403436-05:00 ERR kernel: [13641.000423] bxt_da7219_max98357a_i2s bxt_da7219_max98357a_i2s: ASoC: CODEC DAI intel-hdmi-hifi1 not registered
2017-11-09T08:36:08.413160-05:00 ERR cras_server[1543]: USB card: vendor:17e9, product:4323, serial num:60567806, checksum:9c25b9d6


Some kernel warnings:
<4>[13423.869040] WARNING: CPU: 2 PID: 25886 at /mnt/host/source/src/third_party/kernel/v4.4/sound/hda/hdac_i915.c:92 snd_hdac_display_power+0x87/0xb2 [snd_hda_core]()

gbrangers45@ What's the repro rate? Does the issue always happen after you connect external monitor?

Disconnected and reconnected twice with the same result. Once after a total restart. Connected the Samsung Chromebook Pro and volume settings worked as expected.

Same problem here with a Pixelbook (version Google Chrome	62.0.3202.97). Has the problem straight out of the box. Cannot chose the audio I/O, volume keys don't move the slider, can move the slider with the mouse but still no sound (the speaker icon to the left of the slider stays like the volume is 0)

Same no-sound/slider problem with new Pixelbook.  On startup the Pixelbook comes up with no sound, volume button doesn't do anything, and manually moving the volume slider doesn't produce sound (and when you close the status menu window the slider has returned all the way to the left).  So far always corrected after a restart or two.  No external devices connected.

Allen@/Avinash@/Joseph@, have we seen this issue on Eve?

#17 I am on Eve and saw this today.  Had to do an EC reset to fix it. 

Also sent in a feedback with an attachment showing state of volume control, an hour and a half ago (3:04pm EST).

How did you do the ec reset? I tried it a couple of times but it didn't work. Maybe I'm doing it wrong?

#20 I followed JimDantin's instructions at this thread:
https://www.reddit.com/r/PixelBook/comments/7atinl/no_sound_from_my_pixelbook_microphone_and/

I tried an EC reset using this procedure several times, but it didn't work. However my battery dropped to 0 for the first time last night and the audio was functional when booted the computer. 

I have an Acer CB5-311-T9Y2 that no longer plays sound through the earphones.  In the status menu the arrow that should be at the far right of the volume slider has disappeared.  The earphones work fine on my phone.  Sound does come through the chromebook speakers.  I have not added any new apps or extensions since it last worked.  Here are the things I have tried to fix this issue:

Cleared cookies and cache
Disabled all extensions
Device reset
Powerwash
Moved earphone jack in and out several times

With the earphones plugged into the chromebook the sound continues to come through only the chromebook speakers, this is the case for all apps.

If this is the same issue as b/67029862 as abodenha noted, then this firmware issue should have been fixed with M63.

Is this still reproducible on M63 or later?

Also may be a dupe of  https://crbug.com/769446 , which was also fixed in M63

I just tried my headphones and still have the problem, sound through the
chromebook speakers but no sound through the headphones and there is no
arrow on the far right of the sound bar to make a selection.

Your Chromebook is up to date
Version 63.0.3239.140 (Official Build) (32-bit)

My headphones work fine on another computer and my phone.

I haven't had this issue with eve since Dec 30

(Bulk Edit) Adding the new conops Chrome OS hotlist to all open issues with the "#CBC-RS/TC-watchlist" tag, our former tracking tag.

Since December, 2017 I have been experiencing the issue with a set of external Hama speakers (3.5 mm audio jack + USB) on the following devices all running Chrome OS Stable:
- i3 ASUS Chromebox 2 CN60
- Acer C720 Chromebook
- Lenovo Yoga N23 Chromebook
- i7 ASUS Chromebox 3 CN65

In all cases no audio comes from the speakers, the volume slider stays stuck on 0%, and the speakers are not listed in the audio I/O devices.