[linux-dvb] Re: Nova-T 500 (dvb_usb_dib0700) usb disconnects

Jon Burgess jburgess777 at googlemail.com
Tue Feb 27 20:11:44 CET 2007

On Sun, 2007-02-25 at 12:11 +0200, Antti P Miettinen wrote:
> Chris Johns <chris at contemporary.net.au> writes:
> > I see the same sequence that you do. Here is the specific part that
> > matches what I see. Your trace has:
> Hmm.. I guess I need to learn to decipher the logs. Meanwhile there's
> another log at
>   http://www.hut.fi/~apm/usb-disconnect2.txt.gz
> where the disconnect should be approximately at timestamp
> 1493044489. It might be that the disconnect can be provoked by
> interrupt load. I tried whether scanning/tuning/CPU load would trigger
> the disconnect but no luck with those. The latest disconnect happened
> while I was doing a big scp from the VDR box to another machine over
> local ethernet. Might be just coincidence..
> Anyone have a handy way of generating interrupt load?

The attached C program will generate 8192 interrupts per second
using /dev/rtc. You may need to run as root or otherwise do:

# echo 8192 > /proc/sys/dev/rtc/max-user-freq


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