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List:       xine-user
Subject:    Re: [xine-user] ide-scsi DMA
From:       Jeremy Huddleston <jeremyhu () uclink4 ! berkeley ! edu>
Date:       2003-03-31 4:04:42
[Download RAW message or body]

Actually, I was root.  I have my prompt setup to a non-default prompt, 
but that's besides the point...

The problem was with the IDE chipset drivers.  I should've checked 
before posting, but a quick grep through the kernel source popped up 
which option to use in the kernel configuration: AMD Viper Chipset

After recompileing the kernel with that option, everything worked as 
expected.


Ray Olszewski wrote:
> See below.
> 
> At 05:23 PM 3/30/2003 -0800, Jeremy Huddleston wrote:
> 
>> -----BEGIN PGP SIGNED MESSAGE-----
>> Hash: SHA1
>>
>> I decided to try a suggestion made on this list to get DMA working 
>> with my
>> DVD-RW drive, but I can't get it to work.
>>
>> Here's what I'm doing:
>>
>> /proc/ide/hdc $ grep 'using_dma' settings
>> using_dma               0               0               
>> 1               rw
>>
>> /proc/ide/hdc $ echo 'using_dma:1' >settings
>>
>> /proc/ide/hdc $ grep 'using_dma' settings
>> using_dma               0               0               
>> 1               rw
>>
>> OR:
>> /proc/ide/hdc $ hdparm -d1 /dev/hdc
>>
>> /dev/hdc:
>>  setting using_dma to 1 (on)
>>  HDIO_SET_DMA failed: Operation not permitted
>>  using_dma    =  0 (off)
>>
>> Any suggestions?
> 
> 
> Yes. Two.
> 
> 1. Become root. (The $ in the above examples indicates that you did 
> not.) Only root can use hdparm to change DMA settings.
> 
> 2. Next time (if there is a next time) mention what distro and version 
> you are using. Red Hat 8.0, for example, requires an argument added to 
> /etc/modules.conf before DMA can be set on ide-cd devices. Some other 
> distros may have added similar restrictions to their recent versions (I 
> don't know, and the only way we will as a group learn is if everyone is 
> conscientious about reporting distro/version info).
> 
> 
> 
> 




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