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2004 Aug 11 11:06

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Re: [vox-tech] DVD issues
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Re: [vox-tech] DVD issues



The DMA enablability depends on the IDE controller, not the DVD drive.  So
if your motherboard is old, even new DVD players won't work in DMA mode.

-Mark


On Wed, 11 Aug 2004, dylan wrote:

> Hi everyone,
>
> I was recently messing about with DVD playback on linux, and was less than
> impressed with the quality- i.e. playback was at about 75% speed. after some
> googling i came to the conclusion that I had 2 options: 1 get a better video
> card  or 2, fix the DMA settings on the drive with hdparm... (the xv
> extension to X11 was already installed)
>
>
> the initial output from hdparm was as follows:
> linux:/var/log # hdparm /dev/dvd
> ---------------------
> /dev/dvd:
>  HDIO_GET_MULTCOUNT failed: Invalid argument
>  IO_support   =  0 (default 16-bit)
>  unmaskirq    =  0 (off)
>  using_dma    =  0 (off)
>  keepsettings =  0 (off)
>  readonly     =  1 (on)
>  readahead    = 256 (on)
>  HDIO_GETGEO failed: Invalid argument
> ---------------------
>
> i tried a couple of combinations of turning on DMA, as well as toggling the
> other settings. Any setting other than the default lead to a non-functioning
> DVD drive, and the following lines in /var/log/messages:
> ---------------------
> Aug 10 22:40:00 linux kernel: hdd: drive_cmd: status=0x51 { DriveReady
> SeekComplete Error }
> Aug 10 22:40:00 linux kernel: hdd: drive_cmd: error=0x04Aborted Command
> ---------------------
>
> I have ordered a new video card for this machine, as the integrated video is
> awful. perhaps this will solve my problems. however, is it normal for a
> modern DVD drive like this one refuse to accept DMA transfers?
>
>
> any ideas?
>
> thanks in advance!
>
> Dylan
>
> _______________________________________________
> vox-tech mailing list
> vox-tech@lists.lugod.org
> http://lists.lugod.org/mailman/listinfo/vox-tech
>

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Mark K. Kim
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