At Tue, 21 Oct 2003 16:38:44 +0800, Bill Gou wrote: > > [1 <text/plain; us-ascii (7bit)>] > Takashi Iwai wrote: > > At Mon, 20 Oct 2003 15:48:55 +0800, > > Gou Zhuang wrote: > > > >>I'm running kernel 2.4.22 and alsa-0.9.7c on a Dell laptop. I have problem on > >>suspend/resume when alsa modules loaded. I have done a few testings, below is my > >>findings: > >> > >>If the snd-pcm-oss module is in use(by arts sound server) at the time of suspend, > >>kernel > >>oops upon resuming and X server crashes. It has no problem when snd-pcm-oss is not > >>in use( > >>released by arts). 0.9.6 has the same behavior. My sound card is on-board intel8x0. > >> > >>I searched the mail archive and didn't find any similar cases. Could anybody look > >>into > >>this problem? > > > > > > i don't see any obvious bugs in the resume code, and i thought it > > worked fine once on my test machine. > > could you check at which funciton the oops occurs, e.g. simply by > > puttig debug printk at each entry point? according to ksymoops, it's > > in snd_intel8x0_resume() (i.e. intel8x0_resume()). this could be > > either in snd_intel8x0_chip_init() or snd_ac97_resume(). > > in the latter function, there is no sleep or no wakeup, so it's likely > > in the former one. > > > > > > Takashi > > > I added some printks in intel8x0.c and ac97_codec.c, all printk outputs are labeled > 'MYDEBUG'. I also enabled debug when compiling. This time I noticed the below debug > message after resuming, it repeated for 170 times: > > ALSA pcm_oss.c:552: snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed that's strange if this message appears before snd_intel8x0_resume() is called. if it's after the resume() call, it's ok.
> The last function called before kernel oops is snd_power_change_state(). yes, it looks like the wake_up() in that function. but it should be ok. perhaps memory corruption already occured somewhere. anyway, try to comment out the wake_up() there. also, please try to do suspend with the minimum setting - i.e. no applications running but just only the drivers. Takashi ------------------------------------------------------- This SF.net email is sponsored by OSDN developer relations Here's your chance to show off your extensive product knowledge We want to know what you know. Tell us and you have a chance to win $100 http://www.zoomerang.com/survey.zgi?HRPT1X3RYQNC5V4MLNSV3E54 _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
