[mythtv-users] Lockup with PVR-350

[Darren Hart]

> we are many having problems with the tuner. We are not yet sure where
> the problem comes from. Check the mythtv user, ivtv-user and
> ivtv-devel lists archives in the past days. They are already threads
> on that matter.
> 
> There are currently 2 main ideas: DMA problems and power supply.
> I currently disabled DMA on my hard disk, and I have 5 hours uptime,
> which is one of the best I had in the past week. But I can't see Live
> TV correctly because of that... :(
> 
Just to add to the mix, I run the frontend and backend on the same 
system with a pvr-250 and a pvr-350, using ivtv-fb for X.  All my 
drives, including root, recordings, and live-tv cache, are all nfs 
mounted.  With Myth 0.16 and ivtv-0.1.9a I had very few lockups, with 
Myth 0.17 and ivtv-0.2.0-rc3g I get a lockup at least once a show.  I 
can ssh in and kill the frontend and restart it.  The UI is responsive 
but all the text and the selection area are filled with a portion of the 
last frame played before the crash.  If I try and play a recording, the 
machine locks hard.

Checking lspci show that the pvr-250 and the nvidia card (used only for 
viewing boot messages and the tty) share IRQ 11, and the pvr-350 is on 
IRQ 9.

Since I am not sharing IRQ's with the 350 and I don't have any local 
disks spun up, I thought this might be an interesting data point.  The 
box is a PII 400 with 320 MB of RAM.

thoughts? comments?

--Darren