62 lines
2.6 KiB
Text
62 lines
2.6 KiB
Text
- Start capturing by pressing "c" or by selecting it via a menu!
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- Start capturing by pressing "c" or by selecting it via a menu!!!
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- The memory of some S3 cards is not recognized right:
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First of all, if you are not using XFree-3.2 or newer, upgrade AT LEAST to
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XFree-3.2A! This solved the problem for most people.
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Start up X11 like this: "XF86_S3 -probeonly" and write down where the
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linear frame buffer is.
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If it is different to the address found by bttv install bttv like this:
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"insmod bttv vidmem=0xfb0"
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if the linear frame buffer is at 0xfb000000 (i.e. omit the last 5 zeros!)
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Some S3 cards even take up 64MB of memory but only report 32MB to the BIOS.
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If this 64MB area overlaps the IO memory of the Bt848 you also have to
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remap this. E.g.: insmod bttv vidmem=0xfb0 remap=0xfa0
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If the video memory is found at the right place and there are no address
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conflicts but still no picture (or the computer even crashes),
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try disabling features of your PCI chipset in the BIOS setup.
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Frank Kapahnke <frank@kapahnke.prima.ruhr.de> also reported that problems
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with his S3 868 went away when he upgraded to XFree 3.2.
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- I still only get a black picture with my S3 card!
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Even with XFree-3.2A some people have problems with their S3 cards
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(mostly with Trio 64 but also with some others)
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Get the free demo version of Accelerated X from www.xinside.com and try
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bttv with it. bttv seems to work with most S3 cards with Accelerated X.
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Since I do not know much (better make that almost nothing) about VGA card
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programming I do not know the reason for this.
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Looks like XFree does something different when setting up the video memory?
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Maybe somebody can enlighten me?
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Would be nice if somebody could get this to work with XFree since
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Accelerated X costs more than some of the grabber cards ...
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Better linear frame buffer support for S3 cards will probably be in
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XFree 4.0.
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- Grabbing is not switched off when changing consoles with XFree.
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That's because XFree and some AcceleratedX versions do not send unmap
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events.
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- Some popup windows (e.g. of the window manager) are not refreshed.
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Disable backing store by starting X with the option "-bs"
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- When using 32 bpp in XFree or 24+8bpp mode in AccelX 3.1 the system
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can sometimes lock up if you use more than 1 bt848 card at the same time.
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You will always get pixel errors when e.g. using more than 1 card in full
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screen mode. Maybe we need something faster than the PCI bus ...
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- Some S3 cards and the Matrox Mystique will produce pixel errors with
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full resolution in 32-bit mode.
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- Some video cards have problems with Accelerated X 4.1
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