Internal microphone not working on ThinkPad T490 (Realtek ALC257 / Intel SST)
[email protected] Mon, 25 May 2026 11:48:44 +0200 (CEST)
| Newsgroups | gmane.os.openbsd.bugs |
|---|---|
| Message-ID | <[email protected]> |
Category: kernel Synopsis: Internal microphone not working on ThinkPad T490 (Realtek ALC257 / Intel SST) Description: Internal microphone produces no audio on ThinkPad T490 running OpenBSD 7.9. kern.audio.record=1, all mixer settings correct, all record channels unmuted. Recording produces files with Maximum amplitude 0.000000. The internal mic is routed through Intel Smart Sound Technology (SST), not the azalia HD audio codec. OpenBSD has no driver for Intel SST. How-To-Repeat: sox -t sndio default test.wav trim 0 3 && sox test.wav -n stat shows Maximum amplitude 0.000000 Fix: Driver needed for Intel Smart Sound Technology (SST) chip. Hardware: Lenovo ThinkPad T490, azalia0 codecs: Realtek ALC257, OpenBSD 7.9 amd64