At Sat, 30 Nov 2002 10:17:49 -0600, alsa user wrote: > > > > Takashi Iwai wrote: > > >At Fri, 29 Nov 2002 01:12:28 -0600, > >alsa user wrote: > > > >> > >>Using a Crystal cs4237B device with ALSA drivers from either > >>the stable release or the latest development release. > >>When opening and reading from the audio device (/dev/audio > >>or /dev/dsp0) the system hangs. [Opening the device for write > >>only is no problem -- and playing music works great.] > >> > >>With latest 0.9 release things are definitely better (than with 0.5), > >>but reading /dev/audio or /dev/dsp0 still causes same lockup. > >> > >>What works: > >>It is possible to record audio using "arecord" or "record" and at the > >>same time play some tune in a different Unix process using "aplay" > >>(and ALSA playing quality is outstanding!). It is also possible > >>to do conference calls with gnomemeeting, however once in a while > >>the kernel will still freeze. > >> > >>What never works: kernel will always freeze within a second > >>of reading from /dev/dsp0 or /dev/audio (e.g. cat /dev/dsp0). > >>Detailed configurations attached. > >> > > > >it sounds like a problem on OSS emulation. > >could you try to playback and capture at the same time _via OSS > >emulation_ ? it doesn't matter whether it's a single process or not. > >just run e.g. "play" and "rec" (both from sox) at the same time. > > > using rec to record audio freezes the computer even without running > play in the background. Apparently only "arecord" and "record" are > stable way to record in this configuration. Anything else I should try? > I have turned debugging on the kernel but not sure what to look for > after a reboot in this case.
ok, then please tell me the detail you're using. which kernel, which alsa version, which soundcard (or laptop)? do you mean "freeze" as a complete lock-up (typically, blinking LEDs)? or did you get any kernel oops or panic messages? Takashi ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
