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Daved
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 Posted: Tue Jun 12, 2007 6:36 pm |
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Joined: Thu Jan 11, 2007 1:37 pm
Posts: 42
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I am getting choppy dvd playback with any movie. First thing I check for is if the drive is using DMA. Well it's not. So I turn it on with the following command:
Code: hdparm -qd 1 /dev/dvd also tried Code: hdparm -qd 1 /dev/hdc
It shows that DMA is enabled. However, when I play the movie, it's still choppy and hdparm shows it's not enabled. I've tried it with and without the movie playing but still get the same results.
Anyone have a hint on how I can get DMA to work properly. I didn't have this issue with R5E50 and the same hardware.
Last edited by Daved on Mon Sep 03, 2007 10:12 am, edited 1 time in total.
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tjc
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Posted: Tue Jun 12, 2007 8:16 pm |
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Joined: Thu Mar 25, 2004 11:00 am
Posts: 9551
Location:
Arlington, MA
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Daved
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Posted: Tue Jun 12, 2007 9:27 pm |
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Joined: Thu Jan 11, 2007 1:37 pm
Posts: 42
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Thanks tjc for the link. I did all the suggestions in that thread, however, still not showing dma enabled. It's still disabled when I play the dvd.
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tjc
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Posted: Wed Jun 13, 2007 5:32 pm |
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Joined: Thu Mar 25, 2004 11:00 am
Posts: 9551
Location:
Arlington, MA
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You made sure something else wasn't turning it off as described there?
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Daved
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Posted: Wed Jun 13, 2007 7:47 pm |
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Joined: Thu Jan 11, 2007 1:37 pm
Posts: 42
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I disabled the hdparm init script, then tried. Still happening.
Another symptom, if dma is enabled on the dvd and put a movie, it plays for about 30 seconds the kicks me back to the menu. When I issue "hdparm -qd1 /dev/hdc" while the movie is playing, it also kicks back to the menu.
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manicmike
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Posted: Thu Jun 14, 2007 12:06 am |
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Joined: Sun Aug 28, 2005 7:07 pm
Posts: 821
Location:
Melbourne, Australia
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Daved wrote: I disabled the hdparm init script, then tried. Still happening.
Another symptom, if dma is enabled on the dvd and put a movie, it plays for about 30 seconds the kicks me back to the menu. When I issue "hdparm -qd1 /dev/hdc" while the movie is playing, it also kicks back to the menu. Try adding Quote: /dev/hda {
dma = on
}
to /etc/hdparm.conf
Then reboot the machine.
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tophee
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Posted: Thu Jun 14, 2007 3:59 am |
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Joined: Tue Sep 13, 2005 10:48 am
Posts: 852
Location:
London, UK
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This is probably really obvious and perhaps not necessary any more (?) but have you added he other DMA optimisations?
They're on the wiki
Here's the important bit:
Quote: open up /etc/init.d/bootmisc.sh
look at the section at the end titled # Enable DMA
here is what mine looks like
# enable DMA
/sbin/hdparm -qd1c1u1m16 /dev/hda
/sbin/hdparm -qd1c1u1 /dev/hdc
/sbin/hdparm -qd1c1u1m16 /dev/hdb
note: /dev/hdc is my dvd drive; you can't set m16 on it.
The full article is here: http://www.knoppmythwiki.org/index.php?page=Optimize+Hard+Drive+Performance
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Version:R8
Intel C2D 7400, Nvidia 5600 via HDMI to Samsung B37B650TW (PAL), Asus P5QL-E mobo, 4Gb PC6400 DDR2 ram, Samsung Spinpoint 500 Gb & 1Tb drive, Nova-HD-S2 (x2)
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slowtolearn
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Posted: Thu Jun 14, 2007 8:03 am |
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Joined: Wed Nov 16, 2005 8:55 pm
Posts: 1381
Location:
Farmington, MI USA
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manicmike wrote: Try adding Quote: /dev/hda {
dma = on
} to /etc/hdparm.conf Then reboot the machine. ITYM /dev/hdc
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Daved
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Posted: Thu Jun 14, 2007 12:27 pm |
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Joined: Thu Jan 11, 2007 1:37 pm
Posts: 42
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Quote: Try adding
Quote:
/dev/hda {
dma = on
}
to /etc/hdparm.conf
Then reboot the machine. Just got done trying this. Still no avail Also , tried this Quote: open up /etc/init.d/bootmisc.sh
look at the section at the end titled # Enable DMA
here is what mine looks like
# enable DMA
/sbin/hdparm -qd1c1u1m16 /dev/hda
/sbin/hdparm -qd1c1u1 /dev/hdc
/sbin/hdparm -qd1c1u1m16 /dev/hdb
note: /dev/hdc is my dvd drive; you can't set m16 on it.
I wonder if I need to do the same as this chap http://mysettopbox.tv/phpBB2/viewtopic.php?t=14046?
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Daved
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Posted: Mon Sep 03, 2007 10:12 am |
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Joined: Thu Jan 11, 2007 1:37 pm
Posts: 42
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Just a follow up. I found the problem with the DMA issue I was having. It ended up being a bad IDE cable. All that time spent troubleshooting, never thought about replacing a brand new cable.
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