[MPlayer-users] Some problems with my DVD-drive

[Green, Shaun]

"Operation permitted" when trying to enable DMA on a DVD drive on Red Hat
8.0 is just one of the many bugs introduced in 8.0. I had sent a similar
message about a month ago and noone could help me (from any mailing lists).

The solution after a week of wrestling with this problem, was to go back to
Red Hat 7.3 which is way more stable (Gnome 2 is full of bugs anyway).
MPlayer had problems with Gnome 2 anyway, so 7.3 just works better for
MPlayer and video stuff. They removed MP3 and DVD support in 8.0 as well.

Shaun


-----Original Message-----
From: dev_nul [mailto:dev_nul_nul at gmx.net] 
Sent: Thursday, October 24, 2002 3:44 AM
To: mplayer-users at mplayerhq.hu
Subject: [MPlayer-users] Some problems with my DVD-drive

[Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
Hi,

I encountered some problems using mplayer. After reading the FaQs and
documentation, I do not get rid of this problem.
I have to say, that I am very new to Linux, so, my questions might sound
a bit dumb for you ;)

Here are my problems:
I am quite sure, that I encounter leaks because of my DVD-drive. I am
using a Liteon-DVDrom, but it seems, that the data-transfer is not
fluently.
Therefore, I tried to enable DMA using hdparm, but it shows the message:

/dev/hdc:
 setting using_dma to 1 (on)
 HDIO_SET_DMA failed: Operation not permitted
 using_dma    =  0 (off)

I tried it with my cd-burner, which is on the same IDE-channel, and for
my burner, it worked.

The other problem is, that I cannot use /dev/dvd, cause it is not
created by Redhat 8.0. I tried to make a link, ln -s /dev/hdc /dev/dvd,
but mplayer, when I try to open the DVD, keeps saying:
Cannot open VMG info.

On the other way, when I simply mount the DVD, exactly these
data-transfer problems appear - is it possible, that mounting results in
less speed?

I also tried different ways to handle my problem, like using more cache,
or less cache, messed around with the audio-settings and video-settings
in the config-file - but no real advantage in speed. Although I disable
sound using -nosound, exactly at that point of time, when the DVD loads
data again into the cache, the movie get's stumbeling.

My specs:
Duron 950 MHz
384 MB RAM
Nvidia Geforce 2 MX
(nvidia drivers for opengl-support installed, glx runs)
Redhat 8.0
Gnome

So, any hints for me plz?


Thank you in advance

Holger


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