From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751831AbcFTAhG (ORCPT ); Sun, 19 Jun 2016 20:37:06 -0400 Received: from x127155.tudelft.net ([131.180.127.155]:46262 "EHLO djo.tudelft.nl" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751525AbcFTAg6 (ORCPT ); Sun, 19 Jun 2016 20:36:58 -0400 Date: Mon, 20 Jun 2016 02:35:30 +0200 From: Wim Osterholt To: linux-kernel@vger.kernel.org Cc: Wim Osterholt , linux-acpi@vger.kernel.org, perex@perex.cz Subject: kernel-4.7 bug in Intel sound and/or ACPI Message-ID: <20160620003530.GA19571@djo.tudelft.nl> Reply-To: wim@djo.tudelft.nl MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org L.S. up to vanilla kernel-4.6.2 sound was working fine. Switching to kernel-4.7.0-rc3 made sound disappear. No /dev/mixer etc. There appears to be a bug in the Intel sound driver and/or ACPI driver. Dmesg shows interesting lines like: [ 11.498592] ACPI: PCI Interrupt Link [LNKB] enabled at IRQ 7 [ 11.498605] PCI: setting IRQ 7 as level-triggered [ 11.543903] parport0: PC-style at 0x378 (0x778), irq 7 [PCSPP,TRISTATE,EPP] [ 12.757735] genirq: Flags mismatch irq 7. 00000080 (snd_intel8x0m) vs. 00000000 (parport0) [ 12.757751] snd_intel8x0m 0000:00:1f.6: unable to grab IRQ 7 [ 12.757875] snd_intel8x0m: probe of 0000:00:1f.6 failed with error -16 [ 12.900171] genirq: Flags mismatch irq 7. 00000080 (snd_intel8x0) vs. 00000000 (parport0) [ 12.900189] snd_intel8x0 0000:00:1f.5: unable to grab IRQ 7 [ 12.900389] snd_intel8x0: probe of 0000:00:1f.5 failed with error -16 [ 12.922554] genirq: Flags mismatch irq 7. 00000080 (ipw2200) vs. 00000000 (parport0) [ 12.922559] ipw2200: Error allocating IRQ 7 If I boot kernel-4.7.0-rc3 with acpi=off then sound is back! If you need the full dmesg outputs then please get them here: http://webserver.djo.tudelft.nl/dmesg460+ACPI http://webserver.djo.tudelft.nl/dmesg473+ACPI http://webserver.djo.tudelft.nl/dmesg473noACPI (with excuses for the silly hostname which is out of our control) Regards, Wim. ----- wim@djo.tudelft.nl -----