problem with acd udma mode

Marat N.Afanasyev amarat at ksu.ru
Sat Jan 31 21:39:32 PST 2009


i cannot read or write any disk inserted in my

acd0 <PIONEER DVD-RW DVR-111D/1.29>

when this device in udma mode. kernel endlessly repeat that

acd0: setting up DMA failed

and I can access my data on dvd or cd only if I set

atacontrol mode acd0 pio4

Does anybody have such a problem too? is there any ways to bring this 
device into udma mode again?

dmesg:
...
atapci1: <ATI IXP600 UDMA133 controller> port 
0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xff00-0xff0f at device 20.1 on pci0
ata0: <ATA channel 0> on atapci1
ata0: [ITHREAD]
...
acd0: DVDR <PIONEER DVD-RW DVR-111D/1.29> at ata0-master UDMA66
...

uname -a:
FreeBSD zealot.ksu.ru 7.1-STABLE FreeBSD 7.1-STABLE #1: Tue Jan 20 
05:47:24 MSK 2009     root at zealot.ksu.ru:/usr/obj/usr/src/sys/ZEALOT  amd64

grep -A 1 DMA /var/log/messages:
Jan 27 22:12:19 zealot kernel: acd0: setting up DMA failed
Jan 27 22:12:30 zealot last message repeated 3623 times
--
Jan 27 22:12:30 zealot kernel: acd0: setting up DMA failed
Jan 27 22:12:33 zealot last message repeated 919 times
--
Jan 27 22:12:33 zealot kernel: acd0: setting up DMA failed
Jan 27 22:12:45 zealot last message repeated 4021 times
--
Jan 27 22:12:45 zealot kernel: acd0: setting up DMA failed
Jan 27 22:13:05 zealot last message repeated 6571 times
--
Jan 31 21:41:48 zealot kernel: acd0: setting up DMA failed
Jan 31 21:42:10 zealot last message repeated 7531 times
--
Feb  1 08:24:59 zealot kernel: acd0: setting up DMA failed
Feb  1 08:25:09 zealot last message repeated 10 times

-- 
SY, Marat



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