patch-2.4.20 linux-2.4.20/Documentation/video4linux/bttv/README.freeze
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- Lines: 27
- Date:
Thu Nov 28 15:53:08 2002
- Orig file:
linux-2.4.19/Documentation/video4linux/bttv/README.freeze
- Orig date:
Fri Aug 2 17:39:42 2002
diff -urN linux-2.4.19/Documentation/video4linux/bttv/README.freeze linux-2.4.20/Documentation/video4linux/bttv/README.freeze
@@ -46,6 +46,11 @@
the PCI bus. The bt848/878 chips have a few workarounds for known
incompatibilities, see README.quirks.
+Some folks report that increasing the pci latency helps too,
+althrought I'm not sure whenever this really fixes the problems or
+only makes it less likely to happen. Both bttv and btaudio have a
+insmod option to set the PCI latency of the device.
+
Some mainboard have problems to deal correctly with multiple devices
doing DMA at the same time. bttv + ide seems to cause this sometimes,
if this is the case you likely see freezes only with video and hard disk
@@ -56,6 +61,9 @@
other
-----
+If you use some binary-only yunk (like nvidia module) try to reproduce
+the problem without.
+
IRQ sharing is known to cause problems in some cases. It works just
fine in theory and many configurations. Neverless it might be worth a
try to shuffle around the PCI cards to give bttv another IRQ or make
@@ -63,3 +71,4 @@
VGA cards seems to cause trouble sometimes. I've also seen funny
effects with bttv sharing the IRQ with the ACPI bridge (and
apci-enabled kernel).
+
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TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)