On Thu, 2003-01-09 at 12:29, Anton Piatek wrote: > Hi, i am trying to enable dma in Redhat 8 on my dvd drive, so i can > watch dvds. mplayer plays them, except that they are jerky when the dvd > has to keep reading, then pauses between reads. I tried adjusting cache > options for mplayer with no luck, and tried adjusting the speed of the > drive. > > does anyone know why > > |# hdparm -d1 /dev/cdrom > | > |/dev/cdrom: > | setting using_dma to 1 (on) > | HDIO_SET_DMA failed: Operation not permitted > | using_dma = 0 (off) > > fails. the dvd drive is a fairly nice (panasonic?) dvd drive, that plays > dvds admirably in windows (when media player will let it...) I had the same problem initially. By default, Red Hat does not allow DMA on for _some_ IDE CD-ROMs and DVDs. To allow DMA to be turned on, add this line to the /etc/modules.conf file: options ide-cd dma=1 It fixed my performance problems. Best Regards, Keith -- LPIC-2, MCSE, N+ We drive on this highway of fire Got spam? Get spastic http://spastic.sourceforge.net -- Psyche-list mailing list Psyche-list@redhat.com https://listman.redhat.com/mailman/listinfo/psyche-list
