My saa7130-based card stopped being able to change channels after upgrading from kernel 2.6.28 to 2.6.31 (ubunut 9.04 to ubuntu 9.10). r8971 appears to be the version of v4l-dvb that was included in 2.6.28. As of r14164 it is still broken.
Created attachment 26122 [details] dmesg for driver loading and channel changing loading modules for driver... options saa7134 card=42 tuner=38 options tuner debug=1 then changing channels in tvtime... shows the frequency changing in dmesg, but doesn't actually change freq.
Created attachment 26123 [details] tvtime console output The output from tvtime.