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Mon, 12 May 2025 14:56:19 +0000 Date: Mon, 12 May 2025 14:56:17 +0000 (UTC) From: Ruslan Nikolaev To: "regressions@lists.linux.dev" Cc: "kailang@realtek.com" , "tiwai@suse.com" , "alsa-devel@alsa-project.org" , "sashal@kernel.org" , "perex@perex.cz" Message-ID: <1064773772.509063.1747061777318@mail.yahoo.com> Subject: Fwd: [Bug 220109] New: Audio disappears on HP 15-fc000 after warm boot again (ALC256 code path) MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit References: <1064773772.509063.1747061777318.ref@mail.yahoo.com> X-Mailer: WebService/1.1.23772 YMailNovation X-MailFrom: nruslan_devel@yahoo.com X-Mailman-Rule-Hits: nonmember-moderation X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; emergency; loop; banned-address; member-moderation; header-match-alsa-devel.alsa-project.org-0; header-match-alsa-devel.alsa-project.org-1 Message-ID-Hash: QNXRTFUUJGC3PXLHN37NLJL4NNIP73SI X-Message-ID-Hash: QNXRTFUUJGC3PXLHN37NLJL4NNIP73SI X-Mailman-Approved-At: Wed, 14 May 2025 17:59:48 +0000 X-Mailman-Version: 3.3.9 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Hi, Forwarding my regression bug report for HP 15-fc000 / ALC236 (ALC256 code path). #regzbot introduced: v6.12.2 https://bugzilla.kernel.org/show_bug.cgi?id=220109 Sincerely, Ruslan Forwarded Message (see logs in the bug report above): There was a similar bug in the past (Bug 217440), which was fixed for this laptop. (I believe the code path is for ALC256, see below.) The same issue is occurring again as of kernel v.6.12.2. The symptoms are very similar - initially audio works but after a warm reboot, the audio completely disappears until the computer is powered off (there is no audio output at all). The issue is caused by a different change now. By bisecting different kernel versions, I found that reverting cc3d0b5dd989d3238d456f9fd385946379a9c13d in patch_realtek.c ( see https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/sound/pci/hda/patch_realtek.c?h=v6.12.2&id=4ed7f16070a8475c088ff423b2eb11ba15eb89b6 ) restores the sound and it works fine after the reboot.