DVD choppy

[Philip Walden]

Dotan Cohen wrote:
> On a recent Dell laptop, what would cause DVD playback to be very choppy?
Besides the ATA DMA stuff, you may also want to check whether your MTRR 
is being set properly by the xorg X server.

Mine looks like this:

cat /proc/mtrr
reg00: base=0x00100000 (   1MB), size= 256MB: write-back, count=1
reg01: base=0xfc000000 (4032MB), size=  32MB: write-combining, count=1

You should have at least one "write-combining" entry which means the 
graphics card is set properly. Otherwise, performance can drop dramatically.

Philip