Hi Rhoads,
Thanks. The code in IOUSBDevice.cpp looks similar to what I am using.
I have not gotten it to work. The problem seems to be that
KUNCUserNotificationDisplayNotice returns kIOReturnSuccess,
even though nothing was displayed on the screen.
This only fails at boot time. If the device is hot-plugged, the message appears.
Harland Harrison
2Wire.com
-----Original Message-----
From: Rhoads Hollowell [mailto:email@hidden]
Sent: Mon 2/21/2005 9:03 AM
To: Harland Harrison
Cc: email@hidden
Subject: Re: User notifications at boot time
Hi Harland,
If you look in the IOUSBFamily sources in Darwin, specifically in
IOUSBDevice.cpp, you can see what we do for our system messages.
Basically, the call will fail if the system is not yet up, so we wait
30 seconds and try again.
Rhoads Hollowell
USB Software Team
Apple Computer, Inc.
On Feb 18, 2005, at 2:33 PM, Harland Harrison wrote:
> My driver uses the Kernel User Notification API,
> KUNCUserNotificationDisplayNotice,
> to show a message to the user. If the USB device is hot-plugged, the
> message works
> correctly. If the device is present at boot time, however, the user
> sees nothing. The
> kern_return_t is 0 both cases. Delaying the message until the
> Finder is fully
> running seems to fix the problem.
>
> Is there any way to know when the Kernel User Notification API is
> available?
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