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Subject[BUG, bisect] ALSA: hda - No sound output
Takashi, all,

On several of my machines there is no longer any sound output when
running the latest linux-next (20150528). Activity can be seen in a
mixer such as pavucontrol suggesting that there should be sound, but
both the speakers and head phones are silent.

I have bisected the kernel and found that the following patch introduced
the bug.

From 49fb18972581a781658a4637de76e6069ed5964e Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai@suse.de>
Date: Wed, 27 May 2015 08:37:19 +0200
Subject: [PATCH] ALSA: hda - Set stream_pm ops automatically by generic parser

This allows user to test power_save_node feature via sysfs or patch
firmware even on the codecs that don't specify it. It'll also save a
few lines.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
sound/pci/hda/hda_generic.c | 5 ++++-
sound/pci/hda/patch_realtek.c | 1 -
sound/pci/hda/patch_sigmatel.c | 1 -
sound/pci/hda/patch_via.c | 1 -
4 files changed, 4 insertions(+), 4 deletions(-)

--
- Jeremiah Mahler


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