svn commit: r245848 - head/sys/boot/i386/libi386

Sergey Kandaurov pluknet at freebsd.org
Tue Feb 5 07:46:18 UTC 2013


On 4 February 2013 23:46, John Baldwin <jhb at freebsd.org> wrote:
> On Monday, February 04, 2013 4:43:36 am Sergey Kandaurov wrote:
>> On 23 January 2013 22:34, John Baldwin <jhb at freebsd.org> wrote:
>> > Author: jhb
>> > Date: Wed Jan 23 18:34:21 2013
>> > New Revision: 245848
>> > URL: http://svnweb.freebsd.org/changeset/base/245848
>> >
>> > Log:
>> >   Always update the hw.uart.console hint anytime a change is made to the
>> >   comconsole setup.  Previously the hint would be set when if you set a
>> >   custom port, but it would not be updated if you later set a custom speed.
>> >
>> >   Also, leave the hw.uart.console hint mutable so it can be overridden or
>> >   unset by the user if needed.
>> >
>> >   Reviewed by:  kib (earlier version)
>> >   MFC after:    1 week
>>
>> Looks like this results in something wrong.
>> I have a serial console at COM2 (uart1), but it chooses uart0
>> (1016 == 0x3F8), compare .flags and the final hw.uart.console value.
>
> Do you have a working console in the loader?  It is setting the hint based
> on what the loader uses.  I use this to use COM2 for both loader and
> kernel:
>
> console="comconsole vidconsole"
> comconsole_port=0x2f8

Yep, with new changes I still have a working console in the loader.
I don't see output starting from kernel boot until login prompt.

> Note that when hw.uart.console is set, any flags set in hint.uart.X.flags
> to set the console are ignored.  If you are not using -h in /boot.config or
> setting 'console' for the loader to enable a serial console then the loader
> should not be setting hw.uart.console (if it is, that is a bug to be fixed).
> However, configuring the kernel to use a different serial console from the
> loader seems very odd.  You should be able to manually set hw.uart.console in
> loader.conf if you are doing that.

Err.. No, I haven't set hw.uart.console. Sorry for being misleading.
The cited snippet from my previous mail was to demonstrate how the
resulting hw.uart.console value depends (or rather not :)) on hints.
All I have (changed) wrt console is:

/boot/device.hints
#hint.uart.0.flags="0x10"
hint.uart.1.flags="0x10"

/boot/loader.conf
boot_multicons="YES"
boot_serial="YES"
boot_verbose="YES"
console="comconsole,vidconsole"

This setup worked for ages. To isolate this problem I took /boot/loader
from my older current machine (also with COM2) to replace it here,
and it started to work again.

-- 
wbr,
pluknet


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