From owner-freebsd-questions@freebsd.org Tue Mar 19 18:39:13 2019 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 56461153084D for ; Tue, 19 Mar 2019 18:39:13 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from mout.kundenserver.de (mout.kundenserver.de [217.72.192.74]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "mout.kundenserver.de", Issuer "TeleSec ServerPass DE-2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 2F5186A50B for ; Tue, 19 Mar 2019 18:39:11 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from r56.edvax.de ([92.193.208.84]) by mrelayeu.kundenserver.de (mreue107 [212.227.15.183]) with ESMTPA (Nemesis) id 1ML9i0-1hOWyt0pAA-00IAA4; Tue, 19 Mar 2019 19:39:09 +0100 Date: Tue, 19 Mar 2019 19:39:07 +0100 From: Polytropon To: Andrea Venturoli Cc: freebsd-questions@freebsd.org Subject: Re: Resetting a serial port Message-Id: <20190319193907.b0f51931.freebsd@edvax.de> In-Reply-To: <6623dd04-822d-dbdb-d2f5-3021debc1c2a@netfence.it> References: <6623dd04-822d-dbdb-d2f5-3021debc1c2a@netfence.it> Reply-To: Polytropon Organization: EDVAX X-Mailer: Sylpheed 3.1.1 (GTK+ 2.24.5; i386-portbld-freebsd8.2) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Provags-ID: V03:K1:ZDrF83++7jx4FELLrj53Hp1WdEZTpQrw2yA00FgJL3aEc0wpCoU QayYA5WK6WUbmeDdUICT9sMynUi4WyrsR3zdYb6XXhGmB8pO/48tMO5PzLlqCLvN/kQWTbN nKnWIXHi0as2wzArXgp8CAdW/3+4r5aivXjH/OVwDzvr6pH7fZh3S7/+WPzdPJmL8KUX3Ox /aHKBYYUk00cdLPtBkxVg== X-Spam-Flag: NO X-UI-Out-Filterresults: notjunk:1;V03:K0:VlhaY0EIZ/Q=:kFnTvUraRQ1FoDqKDKynM4 SKcc6/9tyLzvLIReexz3ETt/jvpwYWbWqEGtY1CmYbMH6/2AP/wx68ZXMB21qpDBpwz1rR2uc LXkTHtKQjCRh/v2adm/8bPVBV1N1/RTI++2jj+P1mMwxu2MIM/6YiLcdFN6d4X0xQrik9ZY84 Q2CNjCSOZwtbNU9Z7MeKAqGCe+0ra3QkhZKFqdcWyYMEKiZU40b5Q9zlsSqbtyQW0qA/j5/IA c/W0dIa0Hd3c9Dm5nxlQbykuLrsaZWPcWz1+AUNnzFP7TfuUf92N7JmC9TyT0nJFbp3E0zoAs vE67OMjNr0ihWrHuea+U02Gr+GaLZPiWlcPF8tE0xHNmEDgSCTtjEiV6FVqy706yZ1Yy0wsy6 9xQu3MPzNIu2k+9nzwYlRY1DLHmi3pw8bHml35p5KfHGNt3beCiy3qDi1ZVM/aZyOJZXmGrmH PAw4k0YVoYUshos0HFGDWSXK3P+mRfB8+E8CwRtm5ZNWAxFTUOyAwk+4MEebzmm5E8h1zXBXW 3dNJHoK/WBkM+LvzbOBoKlwtfVlIc+LW/K0fFMGJrV3FaKYbMPAQTtX3yn1qbxXDYMqlOgWR3 yTNxnrS62f2DVg0iBmou/motvO81wQyd6fjb0u7pQdx8VQFuO1z8iEmqhOO0KTiN+O1qY4pxC /20Ksy3qMsr2dUqha2xHpLfLZRUemwOhGwjeOzMdBtHweNXTX6sPpBkQXMS6cpGYHk3AkSYkW yGNJf4K6gMB4+yepHG/6xQ3W9hTi+oF4jtV9/u3mr95EJVierZjPS9GhWA4= X-Rspamd-Queue-Id: 2F5186A50B X-Spamd-Bar: +++++ Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [5.34 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; HAS_REPLYTO(0.00)[freebsd@edvax.de]; TO_DN_SOME(0.00)[]; MV_CASE(0.50)[]; HAS_ORG_HEADER(0.00)[]; MX_GOOD(-0.01)[cached: mx00.schlund.de]; RCPT_COUNT_TWO(0.00)[2]; FROM_EQ_ENVFROM(0.00)[]; RCVD_TLS_LAST(0.00)[]; R_DKIM_NA(0.00)[]; ASN(0.00)[asn:8560, ipnet:217.72.192.0/20, country:DE]; MIME_TRACE(0.00)[0:+]; RECEIVED_SPAMHAUS_PBL(0.00)[84.208.193.92.zen.spamhaus.org : 127.0.0.10]; ARC_NA(0.00)[]; REPLYTO_EQ_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; NEURAL_SPAM_SHORT(0.73)[0.726,0]; MIME_GOOD(-0.10)[text/plain]; DMARC_NA(0.00)[edvax.de]; AUTH_NA(1.00)[]; NEURAL_SPAM_MEDIUM(0.97)[0.971,0]; TO_MATCH_ENVRCPT_SOME(0.00)[]; NEURAL_SPAM_LONG(0.99)[0.993,0]; RCVD_IN_DNSWL_NONE(0.00)[74.192.72.217.list.dnswl.org : 127.0.5.0]; MID_CONTAINS_FROM(1.00)[]; R_SPF_NA(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; IP_SCORE(0.26)[ip: (-0.51), ipnet: 217.72.192.0/20(0.11), asn: 8560(1.69), country: DE(-0.01)] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 19 Mar 2019 18:39:13 -0000 On Tue, 19 Mar 2019 17:57:41 +0100, Andrea Venturoli wrote: > I've got a box connected to an hardware device through a serial port. > This is a real RS-232 on the motherboard, not an USB adapter. > > From time to time, the serial port will got stuck and stop > communicating with the device. > This is not a problem with the device, as powering it on and off won't > help. Instead rebooting the whole FreeBSD server will solve. I have successfully done this with a parallel port (a _real_ one, not an USB adapter): # /usr/bin/true > /dev/lpt0 Maybe the corresponding serial device can be reset in the same way? -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...