bktr(4) on -RELENG_6 and -CURRENT

Hi,

something is wrong with the bktr(4) driver on -RELENG_6 and -CURRENT.

Whatever kernel and/or Xorg settings I try I get the same result.
About every second line is being drawn. There are black gaps
between them with occasional exceptions. This exceptionally drawn
lines (which appear mostly in the right half of the TV screen)
make it impossible to watch TV when you switch to fullscreen mode.

In small windowed mode (xawtv default), everything seems to be ok.

Last thing I did was to try the same kernel settings as on my
-STABLE version. But I still get the same result.

Kernel settings:
device  bktr
options OVERRIDE_CARD=2
options OVERRIDE_MSP=2
options BROOKTREE_SYSTEM_DEFAULT=BROOKTREE_PAL
options BKTR_GPIO_ACCESS
options BKTR_SIS_VIA_MODE

I'm using the nvidia driver. When using nv there is the same effect
for a short time until the system freezes completely. In my opinion
nv is totally broken, btw.

Martin