Re: kernel panic when sending MIDI sequencer events
From: Takashi Iwai
Date: Tue Jul 25 2006 - 16:16:07 EST
At Tue, 25 Jul 2006 22:14:02 +0200,
I wrote:
>
> At Tue, 25 Jul 2006 13:01:49 -0700,
> Nathan Becker wrote:
> >
> > Hi,
> >
> > I'm getting a kernel panic when a program sends a MIDI sequencer
> > event. Seems to happen in all recent kernels I've tested. Currently
> > I'm using 2.6.17.7 on an AMD X2 4800+ Nforce4 (Gigabyte K8NXP-SLI)
> > system running Slamd64 10.1 in 64-bit mode. I'm using the ALSA sound
> > modules for intel8x0 for the motherboard sound chip. I should mention
> > that PCM sound works fine, no crashes and sounds OK. If I understand
> > correctly, the intel8x0 does not directly support MIDI sound. I guess
> > this means I need to install Timidity or something to make MIDI sound
> > actually work, but this is of secondary concern. My primary concern
> > is that when programs send a MIDI event, it crashes the whole system.
> >
> > Here is an excerpt from the error message as I've copied it from the console:
> >
> > Call Trace: <ffffffff8038da4d>{rtc_control+56}
> > <ffffffff880b3063>{:snd_rtctimer:rtctimer_start+28}
> >
> > ...more stuff like that. Also mentions snd_seq:snd_seq_control_queue+153
> > snd_seq:snd_seq_deliver_single_event+281
> > snd_seq:snd_seq_deliver_event+337
> > snd_seq:queueptr+60
> > snd_seq_client_enqueue_event+119
>
> Well, it'd be helpful if you can paste more, at least, what kind of
> error it is. Also, please write what you exactly did, how to
> reproduce it on other one's system.
>
>
> > Any help would be greatly appreciated. Please cc me directly.
>
> A possibly simple workaround is to disable CONFIG_SND_RTCTIMER.
Oh, also, showing your kernel config is good as a start, too :)
Takashi
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