Date: Tue, 17 Feb 2009 20:40:15 +0100 (CET) From: Dirk Meyer <dm@home3.dinoex.sub.de> To: FreeBSD-gnats-submit@FreeBSD.org Subject: kern/131785: sysctl hw.snd.maxautovchans panics with snd_hda Message-ID: <200902171940.n1HJeFXs010044@home3.dinoex.sub.de> Resent-Message-ID: <200902171950.n1HJo2Hd087747@freefall.freebsd.org>
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>Number: 131785
>Category: kern
>Synopsis: sysctl hw.snd.maxautovchans panics with snd_hda
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Tue Feb 17 19:50:02 UTC 2009
>Closed-Date:
>Last-Modified:
>Originator: Dirk Meyer
>Release: FreeBSD 8.0-STABLE i386
>Organization:
>Environment:
System: FreeBSD book64.dinoex.sub.de 8.0-CURRENT FreeBSD 8.0-CURRENT #5: Tue Feb 17 06:39:57 CET 2009 root@book64.dinoex.sub.de:/usr/obj/usr/src/sys/GENERIC amd64
$ pciconf -lv
none0@pci0:0:27:0: class=0x040300 card=0x3a0d17aa chip=0x293e8086 rev=0x03 hdr=0x00
vendor = 'Intel Corporation'
device = '82801IB/IR/IH (ICH9 Family) HD Audio Controller'
class = multimedia
subclass = HDA
FreeBSD 7.1 STABLE from 2009 Feb 11:
hdac0: HDA Driver Revision: 20090131_0127
hdac0: [ITHREAD]
hdac0: HDA Codec #0: Intel G45 HDMI
hdac0: HDA Codec #2: Conexant CX20561 (Hermosa)
pcm0: <HDA Intel G45 HDMI PCM #0 Digital> at cad 0 nid 1 on hdac0
pcm1: <HDA Conexant CX20561 (Hermosa) PCM #0 Analog> at cad 2 nid 1 on hdac0
pcm2: <HDA Conexant CX20561 (Hermosa) PCM #1 Analog> at cad 2 nid 1 on hdac0
>Description:
FreeBSD 7.1 STABLE from 2009 Feb 11 does work and play sound
FreeBSD 8.0-CURRENT crashes after loading snd_hda
and run
$ sysctl -w hw.snd.maxautovchans=16
hdac0: <Intel 82801I High Definition Audio Controller> mem 0xf4a00000-0xf4a03fff irq 22 at device 27.0 on pci0
hdac0: HDA Driver Revision: 20090215_0128
hdac0: [ITHREAD]
hdac0: HDA Codec #0: Intel G45 HDMI
hdac0: HDA Codec #2: Conexant CX20561 (Hermosa)
pcm0: <HDA Intel G45 HDMI PCM #0 Digital> at cad 0 nid 1 on hdac0
feeder_init(0xffffff00039d8500) on feeder_vchan returned -1
pcm1: <HDA Conexant CX20561 (Hermosa) PCM #0 Analog> at cad 2 nid 1 on hdac0
pcm2: <HDA Conexant CX20561 (Hermosa) PCM #1 Analog> at cad 2 nid 1 on hdac0
panic: to[0] == 0
backtrace shows "chn_fmtchain" as the caller.
where a "KASSERT" can be found.
a crashdump does not get written.
I have only a photo, backtrace:
chn_fmtchain()
chn_buildcoder()
chn_tryformat()
chn_setformat()
chn_reset()
vchn_create()
pcm_setvchans()
pcm_setmaxautovchans()
sysctl_hw_snd_maxautovchans()
sysclt_root()
userland_sysctl()
>How-To-Repeat:
run this script on an Lenvovo n500 under FreeBSD 8.0-CURRENT
kldload snd_hda
sysctl -w hw.snd.maxautovchans=16
mixer -f /dev/dsp1 100
mixer -f /dev/dsp1 pcm 100
sysctl hw.snd.default_unit=1
>Fix:
unknown
>Release-Note:
>Audit-Trail:
>Unformatted:
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