patch-2.4.20 linux-2.4.20/Documentation/video4linux/bttv/README.freeze

• 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).
+