Sorry for top-posting .. I just wanted to publicly say thank you to Hans for his hard work. The combination of IVTV and MythTV is unbeatable.
Preet PS No I did not change anything else. If I did, it would not matter because I use Axel's packages and don't roll anything myself. On Thu, 2006-17-08 at 00:21 +0200, Hans Verkuil wrote: > > I have been watching this thread with great interest. Here are the > > things that I noticed. > > > > - My problems only started with the 2.6.17 kernel and ivtv 0.7.0 > > Was that all you upgraded, or did you also upgrade other parts, either > hardware or software like gcc? > > > - I read somewhere that this is an IRQ migration problem on SMP kernels > > so I turned off the irqbalance service. Stability increased since > > failures when from 1 - 5 minutes to 5 - 10 days. > > - When I switch to a UP kernel, stability increases again. > > - Someone mentioned a memory timing issue. I have two sets of dual > > channel memory. That might also be the cause. > > > > What this all tells me is there is an IRQ timing issue in ivtv. I have > > no way to prove this since I do not dive into code and am an average end > > user using RPMS from Axel. > > What is happening is that all these actions reduce the chance of DMA > errors. But a DMA error itself isn't a problem as there are many reasons > why that can happen. The driver retries the last DMA transfer and there > things go haywire. Basically the next DMA transfers are all transferred to > a slightly shifted address (offset by somewhere between say 16-128 bytes). > So after that all DMA transfers are shifted and the resulting MPEG stream > is corrupt. However, it is extremely hard to determine where that offset > comes from. > > All this is not helped by the fact that for me it rarely happens, so it is > next to impossible for me to test it. I do have some ideas to try and > increase the chances of this happening which I'll try this weekend. If I > can make it reliably fail within a few minutes, then I have a good > starting point for further investigations. > > Hans > > > > > Does this help? Do others have similar experiences? > > > > My machine is an AMD64 x2 in x86_64 mode. > > > > Preet > > > > > > _______________________________________________ > > 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 _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
