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Mon, 10 Aug 2026 10:18:20 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id tC2OCGyleWpoXwAAD6G6ig (envelope-from ); Mon, 10 Aug 2026 10:18:20 +0000 Date: Mon, 10 Aug 2026 12:18:19 +0200 Message-ID: <874ih29t3o.wl-tiwai@suse.de> From: Takashi Iwai To: "nqse0035" Cc: "regressions" , "linux-sound" , "tiwai" , "linux-kernel" Subject: Re: [REGRESSION] 7.1.6: No sound on MacBook12,1 (Cirrus CS4208) - DAC receives data but speaker silent In-Reply-To: References: User-Agent: Wanderlust/2.15.9 (Almost Unreal) Emacs/30.2 Mule/6.0 Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-Spam-Score: -3.51 X-Spam-Level: X-Rspamd-Action: no action X-Rspamd-Queue-Id: 585923E1F X-Spamd-Result: default: False [-3.51 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-0.999]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; ARC_NA(0.00)[]; TO_DN_ALL(0.00)[]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; MIME_TRACE(0.00)[0:+]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; TO_MATCH_ENVRCPT_ALL(0.00)[]; FROM_HAS_DN(0.00)[]; RCVD_TLS_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; RCPT_COUNT_FIVE(0.00)[5]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; DKIM_TRACE(0.00)[suse.de:+]; RCVD_VIA_SMTP_AUTH(0.00)[]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo,imap1.dmz-prg2.suse.org:rdns,suse.de:mid,suse.de:dkim] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org X-Spam-Flag: NO On Mon, 10 Aug 2026 10:13:11 +0200, nqse0035 wrote: > > > Hi, > > Regression introduced in: v7.1.5 -> v7.1.6 (tested both; config unchanged) > > Hardware: MacBook9,1 (2016 MacBook 12"), HDA Intel PCH, > Cirrus Logic CS4208 codec (SSID 106b:0000) > Kernel: 7.1.5.arch1-2 (works) / 7.1.6.arch1-1 (broken) on Arch Linux > Audio stack: PipeWire 1.6.8, WirePlumber 0.5.15 > > Symptom: > After upgrading to 7.1.6 and rebooting, the internal speaker is > completely silent. Volume UI responds, playback apps run, but no > sound comes out. Reboot does not help (this is NOT the pre-existing > occasional no-sound-after-boot issue - it is persistent). > > What I verified (all identical between 7.1.5 and 7.1.6): > - Codec enumerates fine; snd_hda_intel + snd_hda_codec_cs420x load OK > - PipeWire/WirePlumber up; default sink > alsa_output.pci-0000_00_1f.3.analog-stereo present and active > - Mixer controls unmuted (Master 72%, PCM 100%, Line Out 100%) > - Routing correct: Active Port = analog-output-speaker, > headphones not available > - DAC Node 0x02 shows "Converter: stream=1" -> data IS reaching the > codec, but the speaker amplifier never produces sound > - dmesg/journalctl: no ALSA/HDA errors at all > - Codec fixup/autoconfig logs identical between kernels: > "CS4208: picked fixup for codec SSID 106b:0000", > line_outs=1 (0x1d) type:speaker, hp_outs=1 (0x10) > - Verified power_save=0 (our setting) is NOT the cause: reloaded > module with power_save=10, still silent; and 7.1.5 works with the > same configuration > > Conclusion: > A regression between 7.1.5 and 7.1.6 breaks the CS4208 amplifier > output path. Suspect: the HD-audio pending-IRQ handling rework from > the 7.1-rc5 cycle (stated to affect "odd machines"), which likely > changed hda-intel/hda-core behaviour on this platform. > > Workaround: staying on 7.1.5 (pinned). Happy to run tests or > provide any further debug info. > > #regzbot introduced: v7.1.5..v7.1.6 Through a quick glance, there is no relevant change between v7.1.5 and v7.1.6. At best, please do bisect. thanks, Takashi