https://qa.mandrakesoft.com/show_bug.cgi?id=477
[EMAIL PROTECTED] changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
------- Additional Comments From [EMAIL PROTECTED] 2003-02-09 12:10 -------
No answer from the user, invalid it.
------- You are receiving this mail because: -------
You are on the CC list for the bug, or are watching someone who is.
------- Reminder: -------
assigned_to: [EMAIL PROTECTED]
status: RESOLVED
creation_date:
description:
"dmesg | grep DMA" shows:
hdd: DMA disabled
I have the ECS k7vma motherboard (VIA 686B southbridge). /dev/hdd is a DVD
drive. Since the kernel disables the DMA on the DVD drive, playing DVD is hard
because of high framedrops (even with AGP 4x mode enabled on my nvidia card).
System load goes up to 1.5. Once I enabled DMA on /dev/hdd (using hdparm), DVD
playback became smooth with system load falling below 0.5 !!
Why does the kernel disable DMA in CD/DVD drives, when the same kernel
enables (by default) UDMA5 modes on my hard drive ? Makes little sense.
