Re: [ivtv-devel] Any Update on TRAC Ticket 49 on DMA issues

Wed, 07 Jun 2006 04:31:37 -0700

Hans Verkuil wrote: 
On Tuesday 06 June 2006 11:47, Steven Ellis wrote:
  
Got DMA errors and MPEG artifact/corruption appearing on my Hauppauge
PVR 150 unit with the ivtv 0.4.4 driver. Looks like similar problems
to trac issue 049.

First - How can I login so I can update or add to this ticket.
    

For now request a login from Axel Thimm. Trac was closed for anonymous 
bug reports as it was spammed continuously :-(

  
Secondly - Any tips on how to best trouble shoot the issue when it
happens. For example can I tune the PCI bus to prevent this from
happening.

Unloading/reloading driver and or firmware doesn't fix it. I have to
power off for a couple of minutes to sort it out.
    

There isn't really anything that can be done. Turn off any frequency 
scaling (that solves it for some people). Every time I think I finally 
have the time to investigate further something else crops up. It's only 
a few people that have this problem but the core cause is probably 
wrong handling of DMA errors.
Had some different output I haven't seen before happen today.

Jun  7 23:00:57 mythtv kernel: ivtv0 warning: i2c client addr: 0x1b not found for command 0x402c5639!
Jun  7 23:01:10 mythtv kernel: ivtv0 warning: i2c client addr: 0x1b not found for command 0x402c5639!
Jun  7 23:01:13 mythtv kernel: ivtv0 warning: i2c client addr: 0x1b not found for command 0x40046d11!
Jun  7 23:01:16 mythtv kernel: ivtv0 warning: i2c client addr: 0x1b not found for command 0x40046d11!
Jun  7 23:01:16 mythtv kernel: ivtv0 warning: i2c client addr: 0x1b not found for command 0x402c5639!


I'll turn of scaling and reboot in the morning as see how we go from there.

Steve
_______________________________________________
ivtv-devel mailing list
[email protected]
http://ivtvdriver.org/mailman/listinfo/ivtv-devel

Reply via email to