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Date: Mon, 16 Nov 2009 09:26:36 +0000
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Steve Meisner <smeisner@charter.net>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Parallel Driver(s) Broke in 2.6.31
Message-ID: <20091116092636.2b12e3c5@lxorguk.ukuu.org.uk>
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References: <200911152154.47510.smeisner@charter.net>
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On Sun, 15 Nov 2009 21:54:47 -0500
Steve Meisner <smeisner@charter.net> wrote:

> I posted to the Mandriva forum with no luck yet.  I recently upgraded to 
> Mandriva 2010.0 and in doing so lost ability to use my parallel printer.  
> After many hours of debugging effort and finding nothing in logs or 
> hardware/driver error messages, I went on a hunch that it could be related to 
> the kernel.  So I rolled back to the 2009.1 kernel 2.6.29 and printing 
> returned.  I don't know how to proceed with determining the root cause as I 
> cannot find any error in the logs or differences in hardware detection and 
> module loading.  I don't even know the hierarchy of the modules involved 
> (parport, parport, pc, lp, and ppdev).   Should I start diffing those modules 
> and see if I get lucky applying hacking 101 techniques?  Please CC me 
> (smeisner@charter.net) if you have any suggestions (except for buying a new 
> printer).

Start by looking at the boot messages from each ("dmesg" as a command
will show you them after boot).