linux-kernel - Re: Help: undesired 10 seconds delay in creating USB devices

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Message-ID: <20081023161355.GA8171@kroah.com>
Date:	Thu, 23 Oct 2008 09:13:55 -0700
From:	Greg KH <greg@...ah.com>
To:	"Gu, Mingkun" <Mingkun.Gu@...CH.COM>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Help: undesired 10 seconds delay in creating USB devices

On Thu, Oct 23, 2008 at 01:11:00PM -0300, Gu, Mingkun wrote:

Please stop sending email in HTML format, the mailing lists reject it.

> [MKGU>] My device driver name is "usbled". Our USB device has
> VendorID=11b4. After I unplugged the USB cable connecting to this device
> and kept the device driver "usbled" remaining loaded, I plugged in the
> USB cable back to the system again. I could see the device information
> retrieved from /proc/bus/usb/devices immediately but the device name
> /dev/usbled0 was seen after near 10 seconds.

That sounds like a udev script issue, not a kernel issue, correct?

> > If you run 'udevadm monitor', does it show a 10 second delay?
> 
> [MKGU>] I don't have the program 'udevadm' on my system.

Do you have the program 'udevmonitor'?  I suggest trying that.

thanks,

greg k-h
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