So anyway... I am quite confused by this problem thus I'll stop here. But there
is another thing. Sometimes, when starting locking with pre3, there is this
message: "...: IRQ lockup, cleared int mask" (from saa7146_core.c).
So there might be a problem in the lower saa7146 parts of the driver. I
must admit that there are probably many other pitfalls in that part of
the driver. After the DVB driver had been forked off my old saa7146
driver, which was good-enough for me at that time, these parts have not
been improved, while I have been improving my saa7146 driver in parallel
up to now.