linux-kernel - Re: 3.5-rcX: USB support without udev?

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Message-ID: <20120701204118.GA1018@polaris.bitmath.org>
Date:	Sun, 1 Jul 2012 22:41:18 +0200
From:	"Henrik Rydberg" <rydberg@...omail.se>
To:	Bob Tracy <rct@...rkin.frus.com>
Cc:	Greg KH <gregkh@...uxfoundation.org>,
	Ming Lei <tom.leiming@...il.com>, linux-kernel@...r.kernel.org
Subject: Re: 3.5-rcX: USB support without udev?

> If I knew what was missing, I'd create it and be done with it.  Here's
> the scenario...  Kernel built from the standard kernel.org tree.  All
> drivers needed at boot time are built-in, except now there's probably
> something missing on the USB side of things.  No initrd.

Are modules turned off as well?

> I'll attach my
> config file on the good chance someone will spot the missing piece(s)
> quickly.  Note that the DEVTMPFS options are disabled in this config,
> but I'll reenable them if required.  When I said devtmpfs "didn't help,"
> what I meant was, by itself relative to my current configuration, turning
> on devtmpfs made no difference.

I cannot see your attached files, but is there any chance this is
about HID, not USB?

> Per the syslog entries I included in my initial post on this thread, the
> only difference between the pre- and post- usbfs removal cases seems to
> be whatever is needed for the input subsystem to see the USB keyboard
> and mouse.  I see the USB hubs and attached devices getting detected,
> but whatever "glue" allows the keyboard and mouse to work isn't there,
> and the input subsystem doesn't emit the expected messages at boot time.

If you did a 'make oldconfig' on anything prior to -rc5, chances are
you do not have CONFIG_HID_GENERIC=y in your .config.

Henrik
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