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From: Sean Young <sean@mess.org>
To: Nathan Zimmer <nzimmer@sgi.com>
Cc: linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
	gregkh@linuxfoundation.org, alan@linux.intel.com,
	"Rafael J. Wysocki" <rafael.j.wysocki@intel.com>
Subject: Re: console issue since 3.6, console=ttyS1 hangs
Date: Sat, 29 Oct 2016 22:16:47 +0100	[thread overview]
Message-ID: <20161029211647.GA25740@gofer.mess.org> (raw)
In-Reply-To: <20161028194225.GA233549@stormcage.americas.sgi.com>

On Fri, Oct 28, 2016 at 02:42:25PM -0500, Nathan Zimmer wrote:
> On Thu, Oct 27, 2016 at 09:19:16PM +0100, Sean Young wrote:
> > On Wed, Oct 26, 2016 at 01:16:16PM -0500, Nathan Zimmer wrote:
> > > On 10/25/2016 03:41 PM, Sean Young wrote:
> > > >On Mon, Oct 24, 2016 at 04:49:25PM -0500, Nathan Zimmer wrote:
> > > >>[    1.565062] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
> > > >The isa probe driver find the serial port.
> > > >
> > > >>[    1.566453] serial 00:04: pnp_assign_resources, try dependent set 0
> > > >>[    1.567383] serial 00:04:   couldn't assign io 0 (min 0x2f8 max 0x2f8)
> > > >But then decides that the port is already in use (the existing serial driver).
> > > >>[    1.568366] serial 00:04: pnp_assign_resources failed (-16)
> > > >>[    1.569188] serial 00:04: unable to assign resources
> > > >>[    1.569924] serial: probe of 00:04 failed with error -16
> > > >Please try and boot 3.7.0 with "8250.share_irqs=1", maybe it will pick
> > > >irq 3 and it will be happy again, but that is just a guess.
> > > >
> > > >I think I have not fully understood what the failure is. Does the serial
> > > >port not work or does the boot hang? What are the symptoms?
> > > With console=ttyS1 the boot will "hang", sometimes it makes it all the way
> > > through but may take 30 minutes, instead of the 2-4 minutes this box
> > 
> > Where does it hang? Any error messages?
> > 
> 
> Shortly after mounting the root.
> After that I get no more output...
> 
> Here is a failure log from 4.8.

So does the console on the serial port work on 4.8? Also what does 
"cat /proc/interrupts" say with and without my change of ordering the
serial pnp probe before the isa probe?

It could be that the serial driver picking a different irq caused another
driver to be forced to pick another irq which does not work.


Sean

  reply	other threads:[~2016-10-29 21:16 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-17 14:49 console issue since 3.6, console=ttyS1 hangs Nathan Zimmer
2016-10-17 15:19 ` Sean Young
2016-10-17 16:41   ` Nathan Zimmer
2016-10-18 16:40     ` Nathan Zimmer
2016-10-18 18:05       ` Sean Young
2016-10-18 19:29         ` Nathan Zimmer
2016-10-19  9:07           ` Sean Young
2016-10-19 22:13             ` Nathan Zimmer
2016-10-20 20:10               ` Sean Young
2016-10-21 15:55                 ` Nathan Zimmer
2016-10-24 13:52                   ` Sean Young
2016-10-24 21:49                     ` Nathan Zimmer
2016-10-25 20:41                       ` Sean Young
2016-10-26 18:16                         ` Nathan Zimmer
2016-10-27 20:19                           ` Sean Young
2016-10-28 19:42                             ` Nathan Zimmer
2016-10-29 21:16                               ` Sean Young [this message]
2016-10-30 16:01                                 ` Nathan
2016-10-28 19:55                             ` Nathan
2016-10-30 15:33                             ` Nathan
2016-10-31 20:27                               ` Sean Young
2016-11-01  2:55                                 ` Peter Hurley
2016-11-02 15:29                                   ` Nathan Zimmer
2016-11-04  0:25                                     ` Peter Hurley
2016-11-04 21:33                                       ` Nathan Zimmer
2016-11-04 22:18                                         ` Peter Hurley
2016-11-05 23:44                                           ` Maciej W. Rozycki
2016-11-07 15:40                                             ` Nathan Zimmer
2016-11-22 15:30                                             ` Nathan Zimmer

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