Re: 2.1.111 BTTV annoyances

Alan Cox (
Sun, 26 Jul 1998 16:56:22 +0100 (BST)

> During the upgrade, bttv.o module seems to get much less intelligent.
> Before it would work out where my video memory is automatically. Now, I
> get no TV unless I use the "vidmem=0xe00" parameter [aside: this isn't
> brilliantly intuitive, my first try was videmem=0xe000000, the real
> address].

It uses the newer PCI API. That broke some autodetects in the change over
Gerald was working on those. You shouldnt be using them anyway - X sometimes
moves the frame buffer when it starts up. If you looke at gnomovision it
uses the XFree86 DGA extension to set the frame buffer parameters

> and back again. I have xawtv running. When I switch back to X, xawtv has
> a "frozen" picture. Worse, if I kill and restart xawtv, I have a BLANK
> picture!!! TV is now totally hosed unless I rmmod and insmod bttv again.
> Not impressive IMHO :)

The card shutdown because its PCI writes were all being aborted in text
mode. Until X and the video stuff are working together (XFree 4.0 I hope)
you shouldnt mode switch back to text with tv going on the bttv.

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