From owner-freebsd-questions@freebsd.org Sun Oct 1 10:20:20 2017 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 22934E0F219 for ; Sun, 1 Oct 2017 10:20:20 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from mailrelay10.qsc.de (mailrelay10.qsc.de [212.99.163.152]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "*.antispameurope.com", Issuer "TeleSec ServerPass DE-2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 8EBF080BD1 for ; Sun, 1 Oct 2017 10:20:19 +0000 (UTC) (envelope-from freebsd@edvax.de) Received: from mx01.qsc.de ([213.148.129.14]) by mailrelay10.qsc.de; Sun, 01 Oct 2017 12:20:10 +0200 Received: from r56.edvax.de (port-92-195-63-92.dynamic.qsc.de [92.195.63.92]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mx01.qsc.de (Postfix) with ESMTPS id 113D23CCD5; Sun, 1 Oct 2017 12:20:09 +0200 (CEST) Received: from r56.edvax.de (localhost [127.0.0.1]) by r56.edvax.de (8.14.5/8.14.5) with SMTP id v91AK9YU017140; Sun, 1 Oct 2017 12:20:09 +0200 (CEST) (envelope-from freebsd@edvax.de) Date: Sun, 1 Oct 2017 12:20:09 +0200 From: Polytropon To: Roland Smith Cc: freebsd-questions@freebsd.org Subject: Re: one character lag with pyboard over usb serial Message-Id: <20171001122009.3fbfbf95.freebsd@edvax.de> In-Reply-To: <20171001093541.GA81952@slackbox.erewhon.home> References: <20171001093541.GA81952@slackbox.erewhon.home> 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-cloud-security-sender: freebsd@edvax.de X-cloud-security-recipient: freebsd-questions@freebsd.org X-cloud-security-Virusscan: CLEAN X-cloud-security-disclaimer: This E-Mail was scanned by E-Mailservice on mailrelay10.qsc.de with 63D76683498 X-cloud-security-connect: mx01.qsc.de[213.148.129.14], TLS=1, IP=213.148.129.14 X-cloud-security: scantime:.1331 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 01 Oct 2017 10:20:20 -0000 On Sun, 1 Oct 2017 11:35:41 +0200, Roland Smith wrote: > I've asked around on the pyboard forum, but nobody there (using Linux or OSX) > has seen this problem. It has been suggested that this is a FreeBSD driver > problem. Try to verify with the "cu" program provided natively by the OS. In worst case, monitor the /dev/cuaU0 device file directly to check what is really being sent in either direction. If the lag also appears there, it really looks like a driver issue... -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...