Emmanuel Fleury wrote: I have also a freez. This is on the midipart. I have got it two times now. And the oops is not in my kernel log so I got it by paper. I hope this can help. My test is simple: run pmidi-1.5.4 (more then one at once) And start and stop them with kill -STOP/-CONT. After a while a get a kernel null dereference.. >From the trace: code 8b 03 89 44 24 18 3b 5c 24 10 75 90 f6 85 a0 00 00 00 04 74
kernel 2.4.16 alsa cvs from 2001-11-23 on a intel PII smp Why can we not have a oops log that works for all errors ? I could not get the error when playing to a hardware midi device. But I got it on the virmidi both the times. > Hi, > > So I tried to collect as much information as I can about this freezing > bug. > > First I am running with a Debian testing/unstable (Sid). To 'celebrate' > the bug, I compiled two kernel 2.4.16, one smp and one mono (to see if > it was SMP related). > > My hardware is: > - Dual-proc PentiumII@450MHz > - Motherboard P2B-DS Asustech > - Soundcard SoundBlaster PCI128 (Ensoniq 1370) > > - Alsa: I get the Alsa from the CVS today (11/27/2001) > (Okay, just right now it was yesterday) > > So, now the bug: > > I first noticed the bug when using the OSS emulation. I was using xmms > and suddenly I wanted to lower the volume... Freeze. > > After a lot of tests I noticed that even without X, on consoles, two > alsamixer were giving exactly the same result (but I have to say now > that I had put the oss modules in /etc/modules.conf so they were active > all during my following tests, I don't know if it is important). > > I get also a funny freeze at some point. I was trying to run mpeg123 and > alsamixer in console mode. At some point, mpeg123 was playing an mp3 and > I was moving the volume of Master to get a freeze. Of course, I get a > freeze and the funny thing was that mpeg123 was looping on a short > sample of the song. But I wasn't able to reproduce it after this. > > So the minimal configuration make it crash was, one alsamixer on ttyS1 > and ttyS2 and then I try to change the volume on either Master, PCM, > PCM1, Line, CD, Mic, Aux, Mon, Mono1 (a lot of fsck, I can tell you). > > Master M, Mic Boos, Aux Input and AD Input were just fine (don't ask me > why). > > My BIG problem was that I really can't get any log from this problem. > No ooops, no strace output (the file was existing but was empty), no > syslog, nothing ! :-/ > > Then I tried on an mono-proc kernel (I also compiled the alsa-driver > against the sources of the mono-proc kernel of course). > > Everything was fine !!!!! > > Huuum, interesting ! So, I don't know exactly what to do now ! :-/ > > I'm strongly suspecting something related with SMP (race condition?). > But I have nothing to prove it (except that it is working without the > SMP option). > > Moreover, I don't know WHERE it is freezing. It must definitely be > somewhere in the kernel (you can't blow up Linux like this without being > directly in the kernel), but where precisely ??? Dunno. > > So, Heeeelp ! :-) > > -- > Emmanuel > > I'm learning real skills that I can apply throughout the rest of > my life... Procrastinating and rationalizing. > -- Calvin & Hobbes (Bill Waterson) > > _______________________________________________ > Alsa-devel mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/alsa-devel -- foo! _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
