Re: issues between ATAng and pcm

On Dec 21, Gordon Bergling wrote:
> Hi _at_all,
> 
> I discovering a strange behavior which seems to be caused of issues
> between ATAng and pcm looking. I start burning a cdr with an atapi
> cdrw drive at low speed (4x) and the sound which is played by xmms is
> getting slower and slower. After a few seconds the system isn't responding
> anymore. One tone is played all the time and the system seems to be hard
> locked up. After nearly 60 seconds the system resumes normal operations.
> I had tried 3 times and the result is allways the same.
> 
> My hardware is:
> ad0: 43979MB <IBM-DTLA-307045> [89355/16/63] at ata0-master UDMA100
> acd0: CDROM <CD-540E> at ata1-master PIO4
> acd1: CDRW <R/RW 8x4x32> at ata1-slave PIO4
> cd0 at ata1 bus 0 target 0 lun 0
> cd0: <TEAC CD-540E 1.0A> Removable CD-ROM SCSI-0 device 
> cd0: 16.000MB/s transfers
> cd0: Attempt to query device size failed: NOT READY, Medium not present
> cd1 at ata1 bus 0 target 1 lun 0
> cd1: <IDE-CD R/RW 8x4x32 2,0> Removable CD-ROM SCSI-0 device 
> cd1: 16.000MB/s transfers
> cd1: Attempt to query device size failed: NOT READY, Medium not present
> da0 at ahc0 bus 0 target 6 lun 0
> da0: <IBM DDRS-34560D DC1B> Fixed Direct Access SCSI-2 device 
> da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing
> Enabled
> da0: 4357MB (8925000 512 byte sectors: 255H 63S/T 555C)

	Hello Gordon,
	What happens when you enable atapi dma?

	echo "hw.ata.atapi_dma=1" >> /boot/loader.conf

	--Mat


-- 
	If you optimize everything, you will always be unhappy.
			- Don Knuth