On Sun, Mar 9, 2008 at 4:36 PM, Terry Simons <email@hidden> wrote:
> I've discovered that a USB SD media reader that I have will cause my
> Mac Pro to be unable to boot while plugged in.
>
> The system chime occurs, but the computer sits at the grey screen
> forever and things like holding down option to choose the boot volume
> and command-option-p-r to zap the PRAM do not work.
>
> After several reboots and attempts to figure out what might be causing
> my system malfunction, I unplugged said USB device and the apple logo
> appeared immediately.
>
> I'd like to file a radar, but I'm not exactly sure what information
> might be needed to be collected or how I might need to go about
> collecting the information.
>
> The reader works when plugged into the system after it has booted.
>
> Any thoughts here?
This might not be a Darwin issue. Have you tried it on a Windows machine?
I work for a university department that manages 1000 machines (~200
Macs and the rest PC). We frequently see this type of problem, usually
with cheaper USB devices. In particular, a couple years ago we had
some USB Zip drives and floppy drives. If the devices were connected
when the computers restarted they would hang in the same way. Both the
Macs and PC's.
I always figured it was a problem initializing the USB device.
Eventually we phased them out, so I didn't worry about it too much.
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