Ubuntu
linux-source-2.6.15 package

DMA not enabled for DVD

Bug #14085 reported by Dimos Dimoulis on 2005-03-16

This bug report is a duplicate of: Bug #36185: Automatically enable DMA on CD-ROMs where it is known to work. Edit Remove

Affects		Status	Importance	Assigned to	Milestone
	linux-source-2.6.15 (Ubuntu)	Invalid	Low	Fabio Massimo Di Nitto

Bug Description

DMA is not automatically enabled for DVD (/dev/hdc), this causes skips on DVD
playback
-It is enabled for the hard disk
-It is enabled in Warty's 2.6.8.1 kernel and 2.6.10 on other linux distributions
(among them Debian)
-I can turn it on manually with hdparm and it works fine.
-This affects (at least) 2.6.10-k7-3 to -5

Chipset: KT400 on motherboard: Gigabyte GA-7VAX
I'm attaching the output of dmesg.

Revision history for this message

Dimos Dimoulis (dimosd) wrote on 2005-03-16:

dmesg of 2.6.10-5-k7 Edit (12.4 KiB, text/plain)

Created an attachment (id=1691)
dmesg of 2.6.10-5-k7

Revision history for this message

Matt Galvin (mgalvin) wrote on 2005-03-16:

Same here, it also affects the x86 kernels/systems. I have been testing many of
this installation CD's and every time I do an installtion I have to turn on DMA
for /dev/hdc, my DVD drive. My DVD drive is a Pioneer DVD-R 108, DVD+/-RW DL.

Revision history for this message

Matt Zimmerman (mdz) wrote on 2005-03-17:

This bug has been marked as a duplicate of bug 36185.