Bug 218027
| Summary: | No sound from monitor speakers unless snd_hda_codec_realtek is inserted before snd_hda_intel | ||
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| Product: | Drivers | Reporter: | aguertin (aguertin+kbz) |
| Component: | Sound(ALSA) | Assignee: | Jaroslav Kysela (perex) |
| Status: | NEW --- | ||
| Severity: | normal | ||
| Priority: | P3 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | Subsystem: | ||
| Regression: | No | Bisected commit-id: | |
| Attachments: |
alsa-info.sh output from a normal boot with sound not working
alsa-info.sh output after reloading snd_hda_intel, with sound working |
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Created attachment 305268 [details]
alsa-info.sh output after reloading snd_hda_intel, with sound working
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Created attachment 305267 [details] alsa-info.sh output from a normal boot with sound not working I have an Asus Pro B550M-C/CSM motherboard, which uses a Realtek ALC887-VD, and a monitor (with speakers) plugged in via DisplayPort. On booting normally, I get no sound from the monitor speakers (other sound outputs like USB or bluetooth headphones work fine). I have found two workarounds for getting the monitor sound working: 1. rmmod snd_hda_intel && modprobe snd_hda_intel 2. ensure that snd_hda_codec_realtek is inserted before snd_hda_intel (e.g. by adding `softdep snd_hda_intel pre: snd_hda_codec_realtek` in modprobe.d) Notably, timing does not seem to be an issue: even if snd_hda_intel is blacklisted from loading at boot, it will not work when it is loaded unless is is unloaded and loaded again or snd_hda_codec_realtek is loaded first. This is not a recent regression - it has been happening as long as I have had the hardware (since at least late 2021). Since it's not clear which is more useful, I am attaching two runs of alsa-info.sh - one is from a normal boot with sound not working, and the other is after running rmmod snd_hda_intel && modprobe snd_hda_intel with sound working.