[Preston] DVD playing

[Richard Revis]

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On Monday 09 Feb 2004 10:21 pm, Dougie Nisbet wrote:

> tells me I should run hdparm -d1 to switch on DMA for my DVD (which is
> secondary master /dev/hdc) but when I try that I get
>
> root at tbird2:~# hdparm -d1 /dev/hdc
>
> /dev/hdc:
>  setting using_dma to 1 (on)
>  HDIO_SET_DMA failed: Operation not permitted
>  using_dma    =  0 (off)

All fun, for sure.

First thing, check your chipset - should be this one or similar for ABIT KT7

peu at elrsr-1 peu $ cat /proc/pci | grep IDE
    IDE interface: VIA Technologies, In VT82C586/B/686A/B PI (rev 6).

make sure you have these options for an ABIT mobo in the kernel under ATA/IDE 
section

[*]   PCI IDE chipset support                                
[*]     Generic PCI IDE Chipset Support                     
[*]     Sharing PCI IDE interrupts support                  
[*]     Generic PCI bus-master DMA support 
[*]       Use PCI DMA by default when available 
<*>     VIA82CXXX chipset support  

recompile, reboot, try hdparm again. If it doesn't work check if you are using 
IDE SCSI - if so you need to greate a new devfs node and then apply hdparm to 
that.

Procedure is the same for 2.6.* but they moved the drivers around a bit.

- -- 
Richard Revis
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