[Solved] [UART] GPS 18-5Hz LVC and COM1 silence, OK on Linux though...

Jeremy Chadwick jdc at koitsu.org
Mon Apr 29 18:25:14 UTC 2013

On Mon, Apr 29, 2013 at 11:14:38AM -0700, Adrian Chadd wrote:
> On 29 April 2013 11:00, Fabian Wenk <fabian at wenks.ch> wrote:
> > Is there anything I can do to debug?
> I don't know. Unfortunately there's no active uart maintainer.

Eh?  I was under the impression Marcel Moolenaar <marcel at freebsd.org>
was active and maintaining this code.  He has alternate Email addresses
if that one does not work.

> That's why I was wondering if someone already knew about whether uart
> kept underflow/overflow statistics.

Based on what I can tell, it does not.  It has the capability of
detecting overruns, but there does not appear to be (based on a quick
skim) any counter capability.

I should note that this has been a long-standing issue with FreeBSD, re:
whether ACPI or ISA should have control over serial ports (uart(4)).
The road goes both ways -- what works for some people doesn't for

If a person is having to throw in ACPI tweaks/overrides/hints to get
this to work, someone should probably involve freebsd-acpi.  I'll also
point out that since the ACPI tables come from the BIOS/UEFI, it does
not surprise people that BIOS maintainers often screw things up as well.

Nothing on PC architecture is simple any more.  Nothing.

| Jeremy Chadwick                                   jdc at koitsu.org |
| UNIX Systems Administrator                http://jdc.koitsu.org/ |
| Mountain View, CA, US                                            |
| Making life hard for others since 1977.             PGP 4BD6C0CB |

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