Philip Walden wrote:
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.
Here is a howto:
http://www.faqs.org/docs/Linux-HOWTO/DVD-HOWTO.html#ss6.1