amd64/138882: Can't install FreeBSD 7.2

John Baldwin jhb at
Fri Sep 18 09:55:24 UTC 2009

Torfinn Ingolfsen wrote:
> On Thu, 17 Sep 2009 13:00:16 +0000 (GMT)
> John Baldwin <jhb at> wrote:
>>  Try turning off legacy USB support in your BIOS.  I have a machine
>> at home that has run 6.x and 7.x/i386 that has this same issue.  The 
>>  problem appears to be that ohci_reset() doesn't fully clear the
>> state of the ohci(4) controller and when the driver first probes it
>> sees a completed USB request that was the last request initiated by
>> the BIOS. 
> Or if that doesn't work (I have a M2A-VM HDMI, but I don't know how old
> a BIOS he has) he can remove all usb attached devices during boot.
> For some reason, most devices work fine when plugged in after the
> machine has booted.
> (Some devices will panic the machine, but that is another story)

Yes, that is true in my experience as well.  In my case I have a UPS 
with a USB adapter plugged in and removing it during boot was another 

John Baldwin

More information about the freebsd-amd64 mailing list