Re: very poor performance of DVD using vesa or fglrx-driver

[B Thomas <thomas.1037@osu.edu>]

Hi,

DMA is enabled as far as I can see. 

hdparm report "Capabilities" as :

DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5*udma6 
     Cycle time: min=120ns recommended=120ns

dmesg shows :
ata2: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xBFA8 irq 15
ata2: dev 0 ATAPI, max UDMA/33
ata2: dev 0 configured for UDMA/33

I think problem may be more to do with the yv12 overlays. But I
find it surprising that this should not be supported by the
fglrx-driver or the VESA driver. I am not sure how I can
confirm this or find a workaround.

regards
b thomas

On Sat, May 20, 2006 at 07:00:14PM +1000, Takis Diakoumis wrote:
> i know this was just posted up but...
> 
> it really sounds like the dvd isn't running in DMA mode. i had this
> problem on my thinkpad at first, dvd would be choppy as you suggest,
> music i played would also be. fixed it by enabling DMA on the drives -
> in my case it was actually using the wrong kernel module for the drives.
> 
> check the output of dmesg (as suggested by another) or the output of
> hdparm -I
> 
> hope this helps.
> 
> Takis