FreeBSD acd0: FAILURE – unknown CMD (0×03) ILLEGAL REQUEST ASC=0×20 ascq = 0×00 Error and Solution

by on December 22, 2007 · 0 comments· LAST UPDATED December 22, 2009


I've installed X11 under FreeBSD operating systems using ports and rebooted the computer and I'm getting the following error:

acd0: FAILURE - unknown CMD (0x03) ILLEGAL REQUEST ASC=0x20 ascq = 0x00

How do I fix this problem?

You are getting error message because of your DVD/CD drive. You can run the following command to get rid of this problem

hal-disable-polling --device {/dev/CDDriveDeviceName}

If your CD drive name is acd0, enter:

hal-disable-polling --device /dev/acd0
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