[mythtv-users] "something is currently using: /dev/dsp"

Simon Starr lists at ruffest.org
Fri Sep 19 14:34:15 EDT 2003


Hi,

Whenever I try and watch live TV, mythbackend seg faults while mythfrontend 
quits with the following error:
Opening OSS audio device '/dev/dsp'.
ERROR: something is currently using: /dev/dsp

fuser -v /dev/dsp before, during and after running mythback/frontend comes 
back empty and I'm running twm with all traces of esd and arts removed.

The mythtv user has full permissions on /dev/dsp etc.

This has only started happening since I installed ALSA - with the OSS driver I 
was using before I could watch live tv but the sound was out of sync so I 
installed ALSA as per the instructions in the HOWTO.

xawtv works fine - I have a cable from tv card output to soundcard line in so 
if i unmute the line in with alsamixer I can hear the audio. If I mute it 
then run aplay /dev/dsp I can hear it a couple of seconds out of sync.

xmms works fine with the ALSA 1.2.8 output plugin.

I'm running Debian unstable on kernel 2.4.22 with a WinTV capture card and 
ymfpci based sound card.

root at saunton:/home/simon# lspci
00:00.0 Host bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133] (rev 03)
00:01.0 PCI bridge: VIA Technologies, Inc. VT8363/8365 [KT133/KM133 AGP]
00:07.0 ISA bridge: VIA Technologies, Inc. VT82C686 [Apollo Super South] (rev 
40)
00:07.1 IDE interface: VIA Technologies, Inc. VT82C586/B/686A/B PIPC Bus 
Master IDE (rev 06)
00:07.2 USB Controller: VIA Technologies, Inc. USB (rev 16)
00:07.3 USB Controller: VIA Technologies, Inc. USB (rev 16)
00:07.4 Bridge: VIA Technologies, Inc. VT82C686 [Apollo Super ACPI] (rev 40)
00:09.0 Multimedia audio controller: Yamaha Corporation YMF-744B [DS-1S Audio 
Controller] (rev 02)
00:0b.0 Ethernet controller: Intel Corp. 82557/8/9 [Ethernet Pro 100] (rev 08)
00:0f.0 Multimedia video controller: Brooktree Corporation Bt878 Video Capture 
(rev 02)
00:0f.1 Multimedia controller: Brooktree Corporation Bt878 Audio Capture (rev 
02)
01:00.0 VGA compatible controller: nVidia Corporation NV15 [GeForce2 GTS/Pro] 
(rev a4)

root at saunton:/home/simon# lsmod
Module                  Size  Used by    Tainted: P
snd-pcm-oss            38308   0  (unused)
snd-mixer-oss          13304   0  [snd-pcm-oss]
nvidia               1629600  11
snd-ymfpci             41792   1
snd-pcm                57828   0  [snd-pcm-oss snd-ymfpci]
snd-page-alloc          6164   0  [snd-ymfpci snd-pcm]
snd-opl3-lib            6564   0  [snd-ymfpci]
snd-hwdep               5088   0  [snd-opl3-lib]
snd-timer              14212   0  [snd-pcm snd-opl3-lib]
snd-mpu401-uart         3312   0  [snd-ymfpci]
snd-rawmidi            13440   0  [snd-mpu401-uart]
snd-seq-device          4208   0  [snd-opl3-lib snd-rawmidi]
snd-ac97-codec         39576   0  [snd-ymfpci]
snd                    28836   1  [snd-pcm-oss snd-mixer-oss snd-ymfpci 
snd-pcm snd-opl3-lib snd-hwdep snd-timer snd-mpu401-uart snd-rawmidi 
snd-seq-device snd-ac97-codec]


I've spent about 10 hours in the last couple of days searching google and the 
mailing list archives to try and find a solution so any help would be very 
welcome as this is in danger of driving me mad :/

Cheers
  Simon
-- 
Simon Starr
www.ruffest.org



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