John Drescher wrote: > On 11/3/07, Marty <[EMAIL PROTECTED]> wrote: >> My PVR system uses two PVR-150 MCE cards. I am repeatedly getting "silent >> hangs" on my up-to-date Debian Etch system, which has a VIA-based AMD64 >> motherboard. The only non-Debian executable is the latest lirc from the >> upstream source. I don't have any reason to suspect ivtv, except that it's >> probably the newest driver I am using, the continuing bug reports here, and >> the >> fact that mythtv crashes or exhibits other anomalous behavior under heavy >> load. >> >> The sole symptom is the apparent lost of the root partition, which therefore >> leaves no logged evidence of the failure. making it difficult to track down. >> (It may even rule out crash dumps.) I don't think the hardware is unstable >> because I have tested using many 10s of kw hours at 100% I/O and CPU load, >> with >> 100% failure detection. >> > Now this is very weird. I have never seen any filesystem damage caused > by a linux system locking up.
I don't mean to imply that the filesystem is damaged, just apparently inaccessable. Any resulting damage seems typical of what happens when drives are not cleanly unmounted. This is just speculation based on the fact I can ping the system, but cannot log in through ssh, and no evidence of any problem appears in the logs. Some of the hangs seem to be USB-related, although I don't know if that's a cause or an effect. What filesystem were you using? ext2 on all hard drives. <snip> > VIA systems are known to have problems with DMA. I would suggest > disabling DMA and see if the problems go away. Thanks. I will try it and report back later. > > Attached is a patch to ivtv-0.10.5 to disable DMA. If that does not > apply you can do it manually. > > Basically you edit driver/ivtv-streams.c and replace the following line: > PCI_DMA_FROMDEVICE, 0, V4L2_BUF_TYPE_VIDEO_CAPTURE, > > with this: > PCI_DMA_FROMDEVICE, 1, V4L2_BUF_TYPE_VIDEO_CAPTURE, > > > John > > > ------------------------------------------------------------------------ > > _______________________________________________ > ivtv-users mailing list > [email protected] > http://ivtvdriver.org/mailman/listinfo/ivtv-users _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
