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Date:      Fri, 12 Sep 2008 10:04:55 -0700
From:      Julian Elischer <julian@elischer.org>
To:        Marcel Moolenaar <xcllnt@mac.com>
Cc:        freebsd-current@freebsd.org, Garance A Drosihn <drosih@rpi.edu>, Peter Wemm <peter@wemm.org>
Subject:   Re: serial console on 8.x (probably sio vs uart)
Message-ID:  <48CAA137.6040404@elischer.org>
In-Reply-To: <64026D00-137A-47AE-B03E-F6A3F3769101@mac.com>
References:  <p06240801c4ef771564d6@128.113.24.47> <75BD7074-F561-42D5-A537-FFF44B612BFB@mac.com> <e7db6d980809112310l298d7aaan5760c29f2fc052d9@mail.gmail.com> <48CA089B.6010102@elischer.org> <64026D00-137A-47AE-B03E-F6A3F3769101@mac.com>

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Marcel Moolenaar wrote:
> 
> On Sep 11, 2008, at 11:13 PM, Julian Elischer wrote:
> 
>> Peter Wemm wrote:
>>> On Thu, Sep 11, 2008 at 8:39 PM, Marcel Moolenaar <xcllnt@mac.com> 
>>> wrote:
>>>> On Sep 11, 2008, at 7:09 PM, Garance A Drosihn wrote:
>>>>
>>>>> After I boot up, the only /dev/tty* devices I have are ttyv0
>>>>> through ttyvf.  I've installed the new /etc/ttys and a new
>>>>> /boot/device.hints, though frankly device.hints has always
>>>>> been a magic-box to me, so I just blindly copied what was in
>>>>> GENERIC.hints and changed hint.uart.0.flags to be "0x30".
>>>> uart(4) does tell you when it's the console:
>>>>
>>>> uart0: <16550 or compatible> port 0x3f8-0x3ff irq 4 on acpi0
>>>> uart0: [FILTER]
>>>> uart0: console (115200,n,8,1)
>>>>
>>>> The first question is: do you see a line like the one above?
>>>> If not (most likely), try to boot explicitly with a serial
>>>> console (i.e. set boot_serial=yes at the loader prompt or
>>>> boot with -h).
>>> He probably also needs to update his /boot/device.hints file.
>>> (change sio to uart)
>>
>> I think uart should read  'sio' entries if there is no sio in the 
>> kernel, and it hasn't found any uart entries..
> 
> No. Hints are optional and misused as they are. We're
> not making things any cleaner if we make driver X look
> for hints for driver Y.
> 


yeah but I almost bricked a machine the other day upgrading because
I didn't have any uart hints but there were sio hints from the
previous kernel that would have done the job.



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