Re: console issue since 3.6, console=ttyS1 hangs

From	Sean Young <sean@mess.org>
Newsgroups	linux.kernel
Subject	Re: console issue since 3.6, console=ttyS1 hangs
Date	2016-10-20 22:20 +0200
Message-ID	<surYJ-3VP-27@gated-at.bofh.it> (permalink)
References	(3 earlier) <stFKq-4lw-11@gated-at.bofh.it> <stGZP-5pH-5@gated-at.bofh.it> <stIff-6f2-3@gated-at.bofh.it> <su0Fd-2Wq-67@gated-at.bofh.it> <su7nj-7o9-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On Wed, Oct 19, 2016 at 05:13:41PM -0500, Nathan Zimmer wrote:
> On 10/19/2016 04:07 AM, Sean Young wrote:
> >So with 3.6.0:
> >
> >>[    2.079980] Serial: 8250/16550 driver, 8 ports, IRQ sharing disabled
> >>[    2.100887] serial8250: ttyS1 at I/O 0x2f8 (irq = 3) is a 16550A
> >>[    2.101715] serial 00:04: unable to assign resources
> >>[    2.102174] serial: probe of 00:04 failed with error -16
> >The pnp probe fails for some reason. I don't understand why.
> >
> >With 3.7.0:
> >
> >>[    2.062700] Serial: 8250/16550 driver, 8 ports, IRQ sharing disabled
> >>[    2.063250] serial 00:04: [io  0x02f8-0x02ff]
> >>[    2.063875] serial 00:04: [irq 12]
> >>[    2.064345] serial 00:04: [dma 18446744073709551615 disabled]
> >>[    2.065540] serial 00:04: activated
> >>[    2.086442] 00:04: ttyS1 at I/O 0x2f8 (irq = 12) is a 16550A
> >Now the pnp probe succeeds (with broken irq from pnp).
> >
> >Can you please check if there is a wrong irq configured in the bios setup
> >or if there is a bios update available? I don't know why this worked in
> >the first place.
> 
> Apparently this is the latest bios available for these nodes.
> Also in the bios setup screens I don't see anything for changing irq numbers
> for serial console.
> But this is a cluster so sometimes thing get hidden to keep everything
> uniform as possible.
> 
> If you want to point me to the pnp probe code you would be suspicious of I
> can try to debug and see what is going there.

That would be great, thanks. A good start would be to boot 3.6.0 with 
"loglevel=7 pnp.debug=1" and hopefully that will show why the probe
used to fail.

Also, does the issue still exist with a more contemporary kernel?


Sean

Thread

console issue since 3.6, console=ttyS1 hangs Nathan Zimmer <nzimmer@sgi.com> - 2016-10-17 17:00 +0200
  Re: console issue since 3.6, console=ttyS1 hangs Sean Young <sean@mess.org> - 2016-10-17 17:20 +0200
    Re: console issue since 3.6, console=ttyS1 hangs Nathan Zimmer <nzimmer@sgi.com> - 2016-10-17 18:50 +0200
      Re: console issue since 3.6, console=ttyS1 hangs Nathan Zimmer <nzimmer@sgi.com> - 2016-10-18 18:50 +0200
        Re: console issue since 3.6, console=ttyS1 hangs Sean Young <sean@mess.org> - 2016-10-18 20:10 +0200
          Re: console issue since 3.6, console=ttyS1 hangs Sean Young <sean@mess.org> - 2016-10-19 17:10 +0200
            Re: console issue since 3.6, console=ttyS1 hangs Nathan Zimmer <nzimmer@sgi.com> - 2016-10-20 00:20 +0200
              Re: console issue since 3.6, console=ttyS1 hangs Sean Young <sean@mess.org> - 2016-10-20 22:20 +0200
                Re: console issue since 3.6, console=ttyS1 hangs Nathan Zimmer <nzimmer@sgi.com> - 2016-10-21 18:00 +0200
                Re: console issue since 3.6, console=ttyS1 hangs Sean Young <sean@mess.org> - 2016-10-24 16:00 +0200
                Re: console issue since 3.6, console=ttyS1 hangs Sean Young <sean@mess.org> - 2016-10-25 22:50 +0200
                Re: console issue since 3.6, console=ttyS1 hangs Nathan Zimmer <nzimmer@sgi.com> - 2016-10-26 20:20 +0200

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