Date: Sat, 28 Oct 2023 10:31:53 -0700 From: Mark Millard <marklmi@yahoo.com> To: bob prohaska <fbsd@www.zefox.net> Cc: freebsd-arm@freebsd.org Subject: Re: Stable/14 dropping ssh connections to FT232 usb-serial adapter Message-ID: <33D1AACD-62FB-444A-868C-B8DE92A7BF50@yahoo.com> In-Reply-To: <ZTp6z9oEqhZQ9/ud@www.zefox.net> References: <ZRcTcL8/Uxf3bIiK@www.zefox.net> <ZTp6z9oEqhZQ9/ud@www.zefox.net>
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On Oct 26, 2023, at 07:42, bob prohaska <fbsd@www.zefox.net> wrote: > On Fri, Sep 29, 2023 at 11:12:00AM -0700, bob prohaska wrote: >> A stable/14 install on a Pi2 v1.1 (armv7) host seems to >> work quite well, apart from dropping ssh connections when >> used to run a cu or tip session to an FT232 usb-serial >> adapter. Ssh connections to interactive shells seem to >> remain up indefinitely, but drop within a couple of hours >> (between the same hosts) when used to run cu or tip. > > Now that ucom supports debugging at the USB end of the > connection a little more information is offered. At the > armv7 USB end of the link the console reports: > > login: ucom_inwakeup: tp=0xd6c38800 > ucom_inwakeup: tp=0xd6c38800 > ucom_inwakeup: tp=0xd6c38800 > ucom_inwakeup: tp=0xd6c38800 > ucom_inwakeup: tp=0xd6c38800 > ucom_inwakeup: tp=0xd6c38800 > ucom_inwakeup: tp=0xd6c38800 > ucom_inwakeup: tp=0xd6c38800 > ucom_inwakeup: tp=0xd6c38800 > ucom_close: tp=0xd6c38800 > ucom_shutdown: > ucom_dtr: onoff = 0 > ucom_line_state: on=0x00, off=0x01 > ucom_rts: onoff = 1 > ucom_line_state: on=0x02, off=0x00 > ucom_cfg_close: To me this just looks like the process using ucom for this just quit using it for this, closing the use down in a normal manor. The question likely becomes what is going on in that more overall context. It would be good to figure out what sequence initiated what lead to ucom_close, not that I've a clue for a good way to get that information. I've not seen anything that I'd guess to be an error visible via the USB messages. (But I'm no expert.) === Mark Millard marklmi at yahoo.com
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