On Wed, 2 May 2007, Robert wrote: > I managed to track this down to two things. > > Firstly if I used the NVIDIA binary drivers, I had this problem, but if > I used the "nv" driver I didn't. For me using the nv driver wasn't > really an option (MythTV menus were horribly slow)
I had this same problem (and so did others) with a pcHDTV HD-3000 ATSC card receiving QAM-256. With the nvidia binary driver, graphics activity would kill reception, while the nv driver didn't have this problem. 8-VSB reception, which doesn't need as high a SNR, is ok with the nvidia driver. I could run azap and watch the lock and SNR readings. If nothing was happening, they would be ok. But as soon as I moved a window around or started mplayer or scrolled an xterm, the SNR would drop and lock would be lost. I've seen reports that changing to a different power supply would fix the issue. Something about the nvidia graphics chip creating noise in the power supply rails, and a better power supply having better filtering. _______________________________________________ linux-dvb mailing list [email protected] http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
