I'm not exactly sure what's causing this, since I am unable to investigate after the problem occurs, but there is definately something very wrong going on with my firewire recording.<br><br>After a few minutes to close to an hour of watching live tv (it may happen with recordings too, but I havn't tested that with confidence yet) through my cable box that is connected via firewire, the audio output will suddenly turn into a high pitched whine. This seems to happen completely at random. However, the video remains intact. I seem to be able to continue watching for as long as I like as long as I don't switch channels or stop watching, and my CPU and ram usage don't seem to be effected.
<br><br>As soon as I tune off of that channel, no matter how I do it, my computer becomes completely unresponsive - mouse freezes, video freezes, numlock doesn't respond, can't kill X or switch to a virtual console - nothing. I have to reboot to get back my system. What's stranger is that if I go to playback the live tv recording of what I was watching, the audio is still good, even when I was just hearing the whine.
<br><br>I don't know which logs to look at for this. I don't have much experience when it comes to troubleshooting hard lockups like this, so I don't even know where to start.<br><br><br>My system:<br>Asus M2N-E motherboard (nForce 570 chipset)
<br>AMD64 3800+<br>2 Gb ram<br>GeForce 7600GT (PCI-E)<br>SoundBlaster Audigy 2 ZS<br>pcHDTV 5500 tuner<br>Scientific Atlanta 3250 HD box connected to my SB Audigy 2 ZS's firewire port<br>Debian echt (testing), using the debian package from
<a href="http://www.debian-multimedia.org/" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">
www.debian-multimedia.org</a>'s apt source for MythTV. I believe this was created from an svn snapshot from early december.<br>Kernel 2.6.20-rc5 preempt (tried with/without APIC/IO-APIC with the same results)<br>I'm still running a 32 bit kernel.
<br><br>Any ideas?<br><br>