Pixel 8 Microphone Issue

Sensitize6303

Hello everyone, relatively new to graphene and have an issue I haven't seen a post on (at least for the release I am running). I have a persistent microphone functionality issue I cannot resolve. The issue is 2fold: 1) when on phone calls the microphone starts to cut after a few minutes, then cuts out entirely and eventually the call disconnects; and 2) the microphone does not pick up audio when I try to record voice notes in Molly or the graphene messaging app. I am running grapheneOS 2025090800 on a Pixel 8, with Android 16 & a Verizon physical sim.

I have tried all the solutions I could find on related issues on this forum (and other forums), including changing global microphone permissions, camera permissions, bluetooth permissions, USB-C permissions, trying to connect external microphones/bluetooth headsets; change wifi calling permissions, resetting mobile networks, and doing a fresh graphene install. None resolved either issue. However, it doesn't seem like a physical microphone issue, because I can record audio in the camera app without an issue.

The voice-notes is not an impactful issue for my use, it was just the only other place I could replicate the microphone issue, and it never works, in contrast to in the phone calls where it will usually work for a minute or two before the microphone goes out.

It seemed like the general consensus on earlier releases where people reported similar issues was that it might be a SIM card/Network issue or not-a-graphene issue, but any help or thoughts would be greatly appreciated.

de0u

Sensitize6303 I think different apps record audio in different ways (e.g., at different quality levels).

Though this would be disruptive, one thing that could be tried would be flashing the device back to Google's OS and placing phone calls. If the microphone problems occur then, that would pretty firmly implicate some hardware problem. If the problem goes away on Google's OS, then it might be interesting to try flashing back to GrapheneOS to see whether the problem does or does not recur.

Sensitize6303

de0u That is definitely the last diagnostic hope I was trying to avoid...

Sensitize6303

Just an update - swapping sims did not resolve the issue, nor did flashing it back to google's OS. I think that makes it solidly not a graphene issue, but any thoughts still greatly welcomed!

de0u

Sensitize6303 swapping sims did not resolve the issue, nor did flashing it back to google's OS.

I'm sure it was painful to go through replacing GrapheneOS with Google's stock OS. If the microphone issue follows the hardware instead of the OS, that's a pretty good indication that it's a hardware problem.

From time to time there have been reports somewhat like this, that seem as if the audio D/A works ok in some configurations but not others, and also reports that the camera seems to work at certain resolutions but not others. It would be nice if there were widely-available diagnostics to test that kind of thing.