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SubjectWeird bttv errors and video hangs with 2.4.2-ac21

Hi,

With -ac21 I'm getting occasional long delays in video output with xawtv
or the picture totally freezes until I click with the mouse in the xawtv
window. dmesg shows:

bttv0: PLL: 28636363 => 35468950 ... ok
bttv0: irq: OCERR risc_count=0fb54810
bttv0: irq: OCERR risc_count=0fb54810
bttv0: irq: OCERR risc_count=0fb54810
bttv0: irq: SCERR risc_count=0fb54810
bttv0: irq: SCERR risc_count=0fb54810
bttv0: aiee: error loops
bttv0: resetting chip
bttv0: PLL: 28636363 => 35468950 ... ok
bttv0: irq: OCERR risc_count=0fb54810
bttv0: irq: OCERR risc_count=0fb54820
bttv0: irq: OCERR risc_count=0fb54810
bttv0: irq: OCERR risc_count=0fb54810
bttv0: irq: SCERR risc_count=0fb54810
bttv0: aiee: error loops
bttv0: irq: SCERR risc_count=0c898014
bttv0: aiee: error loops
bttv0: resetting chip
bttv0: PLL: 28636363 => 35468950 ... ok
bttv0: irq: OCERR risc_count=0fb54810

All of this did not happen with -ac20 under the exact same circumstances,
so -ac21 does something which the bttv driver (0.7.57) doesn't quite like.

Regards,
Udo.
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