From owner-freebsd-bugs@FreeBSD.ORG Fri May 29 21:15:06 2015 Return-Path: Delivered-To: freebsd-bugs@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 50174AE0 for ; Fri, 29 May 2015 21:15:06 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 206A71537 for ; Fri, 29 May 2015 21:15:06 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.14.9/8.14.9) with ESMTP id t4TLF59k027607 for ; Fri, 29 May 2015 21:15:05 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 200526] [snd_hda] hissing/static noise from headphone jack on Dell Precision M4800 Date: Fri, 29 May 2015 21:15:06 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 10.1-STABLE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: david@catwhisker.org X-Bugzilla-Status: New X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 29 May 2015 21:15:06 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=200526 Bug ID: 200526 Summary: [snd_hda] hissing/static noise from headphone jack on Dell Precision M4800 Product: Base System Version: 10.1-STABLE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: david@catwhisker.org Several weeks ago, I replaced my Dell Precision M440 laptop with a new M4800. Sound had "just worked" on the M4400; I was, therefore, rather surprised when I found the hissing/static noise cited in the summary (after swapping the drive from the M4400 into the M4800). I posted about this on a Dell forum (as I wanted to have some way of determining whether this might be a hardware issue (e.g., flaky ground connection or something similar); ref. for that thread. As noted there, I found that the objectionable sound in question is not present (and sound appears to work OK) when the machine runs MS Windows. I believe that this implies that the observed problem is not because of a hardware issue. I also posted about the issue in freebsd-multimedia@; ref. for the start of that thread. I have also found that if I boot Fedora 20 or 21, sound works as expected (no hissing); trying Fedora 19, there is no sound at all. has the "hda" and "pcm" parts of a verbose dmesg.boot; I have placed several other possibly-useful (and -relevant) files in the same directory (), including dmesg and output from the "ALSA Information Script" from testing Fedora 21. The effect appears to be the same whether I run i386 or amd64, and whether I run stable/10 or head. (I track each of those four combinations daily, and capture a verbose dmesg.boot for each.) I will be happy to hack & test, but I need some guidance. -- You are receiving this mail because: You are the assignee for the bug.