update: DVD play back on G3 iBook

[Jon Cortelyou]

Good news on the DVD play back issues I was having with my iBook running
Ubuntu Linux v4.10.

First I have to type: hdparm -d1 /dev/hdb
this turns on UDMA2 for my DVD-ROM
Where would I put this command so it is done automatically at boot up?


I installed xine-ui instead of totem-xine and now DVDs play smoothly without
dropping frames. gxine also worked but there is a bug in full screen mode
that crashes gxine when you switch to full screen. xine-ui doesn't have
this problem.



Ok only one more problem to go! =)

I'm getting a 'popping/clicking' sound when the DVD plays loud sounds. The
popping occurs over the iBook's speakers and via headphones. I tried
adjusting the volume but even at low volume I hear audible popping. It
seems like the audio is clipping. It happens at all volume levels. gxine
and xine-ui both have this problem. I'm using the ALSA sound modules that
(I think) emulates OSS?


There is one weird problem that is also audio related but tolerable:

The audio during DVD play back is synced with video but the audio seems play
at a lower frequency. All audio is deeper sounding that it should be. CD
audio sounds fine.

Thanks for any help or suggestions!

[Michel Klijmij]

On Sat, 30 Oct 2004 18:17:04 +0000, "Jon Cortelyou"

Post by Jon Cortelyou
First I have to type: hdparm -d1 /dev/hdb
this turns on UDMA2 for my DVD-ROM
Where would I put this command so it is done automatically at boot up?

Create a small script like this:

--begin--
#!/bin/sh
hdparm -d1 /dev/hdb
--end--

And save it in /etc/init.d
After that, create symlinks to /etc/rc{1,2,3,4,5}.d/

[Jon Cortelyou]

Hi Michel,

Cool thanks.

Post by Michel Klijmij
On Sat, 30 Oct 2004 18:17:04 +0000, "Jon Cortelyou"

Post by Jon Cortelyou
First I have to type: hdparm -d1 /dev/hdb
this turns on UDMA2 for my DVD-ROM
Where would I put this command so it is done automatically at boot up?

--begin--
#!/bin/sh
hdparm -d1 /dev/hdb
--end--
And save it in /etc/init.d
After that, create symlinks to /etc/rc{1,2,3,4,5}.d/
--
| Website: http://michel.klijmij.net/
| GPG key: 0x8A43CF30

[Thomas Jahns]

Post by Michel Klijmij
On Sat, 30 Oct 2004 18:17:04 +0000, "Jon Cortelyou"

Post by Jon Cortelyou
First I have to type: hdparm -d1 /dev/hdb
this turns on UDMA2 for my DVD-ROM
Where would I put this command so it is done automatically at boot up?

--begin--
#!/bin/sh
hdparm -d1 /dev/hdb
--end--
And save it in /etc/init.d
After that, create symlinks to /etc/rc{1,2,3,4,5}.d/

Since Ubuntu is Debian-based I expect the right way is to add an entry
like the following to /etc/hdparm.conf:

/dev/hdb {
dma = on
}

I'd also consider trying io32_support=1 and interrupt_unmask = on.

Thomas Jahns

[Jon Cortelyou]

I tried adding the following to hdparm.conf

/dev/hdb {
dma = on
io32_support = 1
interrupt_unmask = on
}

but dma was 'off' when the machine boots up and I check with: hdparm
/dev/hdb

I tried dma=on without the other parm's but no luck with that either.

Post by Thomas Jahns

Post by Michel Klijmij
On Sat, 30 Oct 2004 18:17:04 +0000, "Jon Cortelyou"

Post by Jon Cortelyou
First I have to type: hdparm -d1 /dev/hdb
this turns on UDMA2 for my DVD-ROM
Where would I put this command so it is done automatically at boot up?

--begin--
#!/bin/sh
hdparm -d1 /dev/hdb
--end--
And save it in /etc/init.d
After that, create symlinks to /etc/rc{1,2,3,4,5}.d/

Since Ubuntu is Debian-based I expect the right way is to add an entry
/dev/hdb {
dma = on
}
I'd also consider trying io32_support=1 and interrupt_unmask = on.
Thomas Jahns
--
"Computers are good at following instructions,
but not at reading your mind."
D. E. Knuth, The TeXbook, Addison-Wesley 1984, 1986, 1996, p. 9

[I R A Darth Aggie]

On Wed, 03 Nov 2004 07:06:54 GMT,

+ I tried adding the following to hdparm.conf
+
+ /dev/hdb {
+ dma = on
+ io32_support = 1
+ interrupt_unmask = on
+ }
+
+ but dma was 'off' when the machine boots up and I check with: hdparm
+ /dev/hdb

Try this:

find /etc -name "S*hdparm" -print

Do you have a hit in /etc/rcS.d/?

James

[Thomas Jahns]

Post by Jon Cortelyou
I tried adding the following to hdparm.conf
/dev/hdb {
dma = on
io32_support = 1
interrupt_unmask = on
}
but dma was 'off' when the machine boots up and I check with: hdparm
/dev/hdb

Did hdparm.conf exist before you edited it? In Debian /etc/hdparm.conf
is part of the hdparm package. Perhaps you could check with

dpkg -l hdparm

if it's installed.

Thomas Jahns

[Jon Cortelyou]

Hi Thomas,

Cool. I'll make those changes and see if they'll work. Any chance those
changes will render my machine unbootable?

Thanks,
Jon

Post by Thomas Jahns

Post by Michel Klijmij
On Sat, 30 Oct 2004 18:17:04 +0000, "Jon Cortelyou"

Post by Jon Cortelyou
First I have to type: hdparm -d1 /dev/hdb
this turns on UDMA2 for my DVD-ROM
Where would I put this command so it is done automatically at boot up?

--begin--
#!/bin/sh
hdparm -d1 /dev/hdb
--end--
And save it in /etc/init.d
After that, create symlinks to /etc/rc{1,2,3,4,5}.d/

Since Ubuntu is Debian-based I expect the right way is to add an entry
/dev/hdb {
dma = on
}
I'd also consider trying io32_support=1 and interrupt_unmask = on.
Thomas Jahns
--
"Computers are good at following instructions,
but not at reading your mind."
D. E. Knuth, The TeXbook, Addison-Wesley 1984, 1986, 1996, p. 9

[Thomas Jahns]

Post by Jon Cortelyou
Hi Thomas,
Cool. I'll make those changes and see if they'll work. Any chance those
changes will render my machine unbootable?
Thanks,
Jon

Not really unless the device in question does indeed have a flawed DMA
implementation. But as you have already tested this, I can't see why it
should leave your machine unbootable.

Thomas Jahns