Page 2 - Playing DVD's smoothly

It works just fine from hard disk

i don´t know what "nautilus" is. i use "cp".
but it does not matter, you should make a simple 1:1 copy. maybe you have to start the dvd player software once with this dvd in the drive before you can actually copy the files.

since the dvd works from your harddisk, it is not a codec problem. imho you really need to activate DMA.

It's the GNOME 2 file manager.

Okay,how can I fix the dma problem?

see where /dev/dvd points to (on the console type "ls -l /dev/dvd")

afaik you must use hdparm on the real device.

see above ("82c686a"...). Also start the kernel configuration menu (cd /usr/src/linux ; make xconfig). Search for via chipset drivers or info.

I get this as output:
lrwxrwxrwx 1 root root 5 nov 23 18:42 /dev/dvd -> cdrom

I believe that its /usr/src/linux-2.4.18-14 on my computer.I couldnt find anything,where exactly should I look?

ok, /dev/cdrom is probably a link again.
what is the output of "ls -l /dev/cdrom"?

/usr/src/linux-2.4.18-14 is fine. SuSE makes a link "linux" that points to the full directory name for ease of use. Don´t know if other distros do it too...

lrwxrwxrwx 1 root root 8 nov 23 15:29 /dev/cdrom -> /dev/hdd

I made a mistake in my last post,it should be:
"I couldnt find anything on via,where exactly should I look?"

did you try now to start "hdparm" with "/dev/hdd"?

for the via drivers: you did start "make xconfig"?
then look at all options that have anything with "ATAPI" or "IDE" or "chipset" in their name and press the "help" button.
sorry, i really can´t even remember the basic layout of the linux kernel config as i did not need to compile a kernel since about 1999 (yes, it was a 2.0 kernel ).

Yes,but its the same error:
HDIO_SET_DMA failed: Operation not permitted

I found some stuff with IDE/ATAPI under "Block devices">"Parralel IDE device support" and under "ATA/IDE/MFM/RLL support">"ATA/IDE/MFM/RLL block devices"
theres a whole list of stuff that looks interesting.

Parallel IDE devices are no help here as they don´t use the on-board IDE controller.
Look for chipset support in the "general" section first, iirc it is there somewhere... maybe you have to activate "show modules in experimental state" also. but not sure if this still exists in kernel 2.4.x

"Include IDE/ATAPI CDROM support",is currently turned off (inATA/IDE/MFM/RLL block devices) ,should it be turned on?
Theres also some stuff about chipset support,which one should I turn on?

It doesnt say say anything about chipsets in the General Setup.

somehow i doubt that your kernel configuration is the one that the kernel is running
i.e. you need the .config file for your installed kernel first, or you´ll have a very bad time configuring everything manually!

for the chipset - as said earlier, read the help for each item. one should mention via and maybe even your specific chipset.

also another place to look for info:
/usr/src/linux-...?.../Documentation
eg.
grep -iR "via" /usr/src/linux-...?.../Documentation/* | less

There are only 3 files in my /usr/src directory:
linux-2.4 (but this points to linux-2.4.18-14)
linux-2.4.18-14
redhat (but this isn't a kernel,just some red hat stuff)

Version 2.4.18-14 is the kernel that I am running at the moment.

The word via is used alot,but not as in hardware,but as "By means of"/"By way of".

aargh... as i am no native english speaker, i did´t consider this... try "chipset" or similar as search string instead.

look for a ".config" file in the redhat directory and in /boot/ for basing your configuration on. or did you alredy compile a kernel from these sources?

Theres isnt a config in /boot,but there are a bunch in ..../linux-2.4.18-14/configs/

kernel-2.4.18-athlon.config and kernel-2.4.18-athlon.config may be what I need,because uname -a says "i686 athlon i386 GNU/Linux"?