François Patte wrote:
Alfredo Ferrari wrote:
Yes
my PATA disk is the master on the second IDE channel (hdc). This is
actually the laptop modular bay where I can insert the DVD/2nd hard
drive/2nd battery. The same disk in the same bay on the same channel
of a D800 (where the primary disk is PATA and not SATA as in the M70)
works nicley with DMA enabled at boot time.
Unfortunately it seems to be a known Linux kernel bug/limitation (see
https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=163418 )
a rather frustrating one I must say.
I don't know much about this, but I came accross this problem for
playing dvd with xine.
It seems to me that the problem occurs on laptop with sata hd: there is
a single controller for both ide drive and sata disk and you cannot set
the dma.
This problem does not occur with desktop where you have ide controller.
I have two solutions for this:
1- hdparm -c1 /dev/hdc
You can watch dvd in a better way (not perfect)
2- rip the dvd to the hard drive with dvdbackup and watch them (perfect)
Hope this help.
Been away for a week so I am late responding.
Having had similar problems on a Toshiba laptop with an Intel ICH6
controller. Could not get DVD's to play and could not get DMA to work.
I can now play DVD's perfectly from my DVD player. I played with the
'options libata atapi_enabled=1' settings and the latest kernel
seems to have all working. I would have to look at the laptop to see
the exact changes (at home). I could not get that libata settings to
work at first.
I know that the changes did not work in grub but I had to play with
the module config files.
It was also recommended to look at possible bios settings.
--
Robin Laing
