misc/83236: FreeBSD does not work with my ATAPI CDROM if atapi.dma=1

[Serg45]

>Number:         83236
>Category:       misc
>Synopsis:       FreeBSD does not work with my ATAPI CDROM if atapi.dma=1
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Jul 10 22:10:21 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Serg45
>Release:        5.4
>Organization:
-
>Environment:
>Description:
FreeBSD 5.3 did not boot on my EliteGroup i-Buddie (Transmeta Crusoe 5600 + ALi M5229 PCI Bus Muster IDE + Sony DVD/CD-RW CRX830E) until I entered safe mode or set atapi.dma=0 before booting the kernel. 
FreeBSD 5.4 boots and works, but CD operations are very slow (ATAPI DMA is turned off by default, as I can see). If I try turn it on (in loader.conf or later, by atacontrol), CDROM stops responding and "Failure read_big medium error asc=0x00 ascq=0x00 error=4(aborted)" appears on the screen...
>How-To-Repeat:
Get motherboard with ALi chipset and set atapi.dma=1
>Fix:
Sorry, no idea...
>Release-Note:
>Audit-Trail:
>Unformatted: