linux-kernel - Re: No serial since kernel 3.8

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Message-ID: <20130417183824.GA2386@kroah.com>
Date:	Wed, 17 Apr 2013 11:38:24 -0700
From:	Greg KH <gregkh@...uxfoundation.org>
To:	Stephan von Krawczynski <skraw@...net.com>
Cc:	richard -rw- weinberger <richard.weinberger@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: No serial since kernel 3.8

On Tue, Apr 16, 2013 at 06:10:06PM +0200, Stephan von Krawczynski wrote:
> On Tue, 16 Apr 2013 16:55:25 +0200
> richard -rw- weinberger <richard.weinberger@...il.com> wrote:
> 
> > On Tue, Apr 16, 2013 at 4:20 PM, Stephan von Krawczynski
> > <skraw@...net.com> wrote:
> > > Hello,
> > >
> > > can some kind soul please explain how I can get my serial port back under
> > > kernel 3.8.X. Earlier kernels showed:
> > >
> > > Jan 10 13:57:18 mybox kernel: [    0.712829] serial8250: ttyS0 at I/O 0x3f8
> > > (irq = 4) is a 16550A
> > >
> > > But 3.8.4:
> > >
> > > Mar 26 10:39:14 admin kernel: [    0.603647] serial 00:0a: disabled
> > >
> > > Only kernel is replaced, no change in distro
> > > Is there some kernel boot parameter needed now?
> > > I tried 3.4.X and it works, even 3.7.X works...
> > 
> > So, 3.8.3 worked and 3.8.4 introduced a regression?
> > If so please confirm.
> > 
> > CC'ing gregkh, just in case...
> 
> No, neither 3.8.4 nor 3.8.3 worked. The last working version I know for sure is 3.7.6
> FYI: I don't load serial as a module

Can you run 'git bisect' between those kernels to track down the
offending commit?

thanks,

greg k-h
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