| Summary: | ASTERISK-12000: Asterisk startup hangs if another alsa application is running | ||
| Reporter: | nick_lewis (nick_lewis) | Labels: | |
| Date Opened: | 2008-05-09 04:26:38 | Date Closed: | 2008-05-13 15:24:33 |
| Priority: | Major | Regression? | No |
| Status: | Closed/Complete | Components: | Channels/chan_alsa |
| Versions: | Frequency of Occurrence | ||
| Related Issues: | |||
| Environment: | Attachments: | ||
| Description: | While an alsa application such as arecord is running (e.g. for live moh) asterisk fails to complete its startup process and instead hangs during the loading of the chan_alsa module. None of the subsequent modules are ever loaded and asterisk therefore behaves unexpectedly. The problem appears to be present in all asterisk versions ****** ADDITIONAL INFORMATION ****** Compilation with some additional debug suggests that the problem is with the following line in the function alsa_card_init err = snd_pcm_open(&handle, dev, stream, O_NONBLOCK); It appears that snd_pcm_open does not understand the O_NONBLOCK flag. A look at alsa documentation indicates that this can be changed to SND_PCM_NONBLOCK as in err = snd_pcm_open(&handle, dev, stream, SND_PCM_NONBLOCK); This does seem to resolve the problem. BTW - there is also the following commented line in chan_alsa.c /* static int block = O_NONBLOCK; */ This may be a bit misleading and could be removed | ||
| Comments: | By: Digium Subversion (svnbot) 2008-05-13 15:22:34 Repository: asterisk Revision: 115944 U branches/1.4/channels/chan_alsa.c ------------------------------------------------------------------------ r115944 | file | 2008-05-13 15:22:32 -0500 (Tue, 13 May 2008) | 4 lines Use the right flag to open the audio in non-blocking. (closes issue ASTERISK-12000) Reported by: nicklewisdigiumuser ------------------------------------------------------------------------ http://svn.digium.com/view/asterisk?view=rev&revision=115944 By: Digium Subversion (svnbot) 2008-05-13 15:23:37 Repository: asterisk Revision: 115945 _U trunk/ U trunk/channels/chan_alsa.c ------------------------------------------------------------------------ r115945 | file | 2008-05-13 15:23:35 -0500 (Tue, 13 May 2008) | 12 lines Merged revisions 115944 via svnmerge from https://origsvn.digium.com/svn/asterisk/branches/1.4 ........ r115944 | file | 2008-05-13 17:28:23 -0300 (Tue, 13 May 2008) | 4 lines Use the right flag to open the audio in non-blocking. (closes issue ASTERISK-12000) Reported by: nicklewisdigiumuser ........ ------------------------------------------------------------------------ http://svn.digium.com/view/asterisk?view=rev&revision=115945 By: Digium Subversion (svnbot) 2008-05-13 15:24:33 Repository: asterisk Revision: 115946 _U branches/1.6.0/ U branches/1.6.0/channels/chan_alsa.c ------------------------------------------------------------------------ r115946 | file | 2008-05-13 15:24:32 -0500 (Tue, 13 May 2008) | 20 lines Merged revisions 115945 via svnmerge from https://origsvn.digium.com/svn/asterisk/trunk ................ r115945 | file | 2008-05-13 17:29:27 -0300 (Tue, 13 May 2008) | 12 lines Merged revisions 115944 via svnmerge from https://origsvn.digium.com/svn/asterisk/branches/1.4 ........ r115944 | file | 2008-05-13 17:28:23 -0300 (Tue, 13 May 2008) | 4 lines Use the right flag to open the audio in non-blocking. (closes issue ASTERISK-12000) Reported by: nicklewisdigiumuser ........ ................ ------------------------------------------------------------------------ http://svn.digium.com/view/asterisk?view=rev&revision=115946 | ||