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Old 05-02-2005, 08:21 AM   #1
marks_linux
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Registered: Jul 2004
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choppy DVD playback


I'm having problems with DVD playback. Visuals momentarily pause and sound becomes out of sync when using totem. I setup DVD playback as per the Ubuntu 5.04 getting started guide (running ubuntu 5.04 as my distro).

Running 32bit 2.6.10-5-k7
kernel on AMD64 3200+ ATI radeon graphics with fglrx up and running (around 2000fps in glxgears). Playback from harddrive is good so looks like DVD drive.

Heres the current info I think? is important:
/dev/hda:
Timing buffered disk reads: 6 MB in 3.06 seconds = 1.96 MB/sec
markw@markhome:~/dist$ sudo hdparm -T /dev/hda

/dev/hda:
Timing cached reads: 2500 MB in 2.00 seconds = 1248.32 MB/sec
markw@markhome:~/dist$ sudo hdparm -i /dev/hda

/dev/hda:

Model=_NEC DVD_RW ND-2500A, FwRev=1.06, SerialNo=
Config={ Removeable DTR<=5Mbs DTR>10Mbs nonMagnetic }
RawCHS=0/0/0, TrkSize=0, SectSize=0, ECCbytes=0
BuffType=unknown, BuffSize=0kB, MaxMultSect=0
(maybe): CurCHS=0/0/0, CurSects=0, LBA=yes, LBAsects=0
IORDY=yes, tPIO={min:120,w/IORDY:120}, tDMA={min:120,rec:120}
PIO modes: pio0 pio1 pio2 pio3 pio4
DMA modes: mdma0 mdma1 mdma2
UDMA modes: udma0 udma1 *udma2
AdvancedPM=no

* signifies the current active mode

Anone any ideas?

Cheers
M
 
Old 05-02-2005, 09:16 AM   #2
acid_kewpie
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well the first port of call is ensuring DMA is enabled... hdparm -d1 /dev/hda etc... if /dev/hda really is your DVD drive (your description is pretty confusing)
 
Old 05-02-2005, 09:54 AM   #3
marks_linux
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Registered: Jul 2004
Posts: 11

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Thanks for the reply.
Ive tried hdparm -d1 /dev/hda but get the following error (both as normal user and as root)
/dev/hda:
setting using_dma to 1 (on)
HDIO_SET_DMA failed: Operation not permitted
using_dma = 0 (off)

Sorry if the post was confusing (it wasn't meant to be) I was trying to give as much info as possible.

I'm trying to show the system info on my DVD drive (hdparm -i etc) and my current read stats (the other two lines).

The relevent line from /etc/fstab is:

/dev/hda /media/cdrom0 udf,iso9660 ro,user,noauto 0 0

If that helps!

M
 
Old 05-02-2005, 04:24 PM   #4
acid_kewpie
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ensure that you are logging in as root on a non-X console, or using "su -" instead of just "su" to avoid any nasty permission hangovers. other than that i've only seen issues like that when a drive is using ide-scsi emulation to run, i.e. it's a cd burner. that said there wouldn't be a reference to /dev/hda normally if it was. is this a cd burner with ide-scsi on it? if so and you're on a 2.6 kernel, then you don't need it at all and you can remove it's use from your bootloader config.
 
Old 05-03-2005, 02:18 AM   #5
Electro
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The program totem is based on mplayer's code is not great at keeping audio and video sync. Try Xine or Video Lan Client. Xine and Video Lan Client has excellent sync even on a slow computer. However it seems that the kernel does not have support for DMA or a certain component that is needed for DMA to work. You will have to configure your kernel and re-compile it.
 
Old 05-03-2005, 02:26 AM   #6
marks_linux
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Thanks for the reply.

Did a lot of googling yesterday and it seems that (as you say) I need to add the support to my kernel and re-compile. Will post back when sorted.
 
Old 05-03-2005, 08:51 AM   #7
acid_kewpie
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totem is based on Xine. not MPlayer
 
  


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