On Wed, Mar 3, 2010 at 6:35 PM, Pedro Ribeiro <pedrib@xxxxxxxxx> wrote: > Hello all, > > yesterday I sent a message asking for help with a problem I was having > with a dib0700 USB adapter and my USB audio soundcard. > > Basically I discovered that the remote control polling in dvb_usb > module was causing it. For reference, my original message is here > http://article.gmane.org/gmane.linux.drivers.video-input-infrastructure/16782 > and I also file a kernel bug here > http://bugzilla.kernel.org/show_bug.cgi?id=15430 > > Looking at dmesg when I plug the DVB adapter it says > dvb-usb: schedule remote query interval to 50 msecs. > > This seemed to me extremely excessive, so I solved the problem by > doing a quick dirty hack. In linux/drivers/media/dvb/dvb-usb-remote.c > I changed d->props.rc_interval to 10000, instead of the default 50 > msec. > > So now when I load the driver, I get > dvb-usb: schedule remote query interval to 10000 msecs. > > And not only the USB audio card is working properly with the DVB > adapter but also the remote control is working perfectly, without any > delay at all! > > So my question is: why is this set to an excessive 50 msec? This is > waaaaaaay too much for remote control polling, and its proven it > causes trouble in the USB bus! > Also, I know my hack was dirty, what the is the proper way to change this? It's already been fixed. Just update to the latest v4l-dvb code. Devin -- Devin J. Heitmueller - Kernel Labs http://www.kernellabs.com -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
