From owner-freebsd-arm@freebsd.org Mon Jun 20 17:00:04 2016 Return-Path: Delivered-To: freebsd-arm@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 BF573AC436A for ; Mon, 20 Jun 2016 17:00:04 +0000 (UTC) (envelope-from ian@freebsd.org) Received: from pmta2.delivery6.ore.mailhop.org (pmta2.delivery6.ore.mailhop.org [54.200.129.228]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 867A31AB2 for ; Mon, 20 Jun 2016 17:00:04 +0000 (UTC) (envelope-from ian@freebsd.org) X-MHO-User: 7bd55043-3708-11e6-8929-8ded99d5e9d7 X-Report-Abuse-To: https://support.duocircle.com/support/solutions/articles/5000540958-duocircle-standard-smtp-abuse-information X-Originating-IP: 73.34.117.227 X-Mail-Handler: DuoCircle Outbound SMTP Received: from ilsoft.org (unknown [73.34.117.227]) by outbound2.ore.mailhop.org (Halon Mail Gateway) with ESMTPSA; Mon, 20 Jun 2016 17:00:25 +0000 (UTC) Received: from rev (rev [172.22.42.240]) by ilsoft.org (8.15.2/8.14.9) with ESMTP id u5KGxtMm003754; Mon, 20 Jun 2016 10:59:56 -0600 (MDT) (envelope-from ian@freebsd.org) Message-ID: <1466441995.34556.44.camel@freebsd.org> Subject: Re: pl2303 lockups on rpi2 From: Ian Lepore To: bob prohaska , Hal Murray Cc: freebsd-arm@freebsd.org Date: Mon, 20 Jun 2016 10:59:55 -0600 In-Reply-To: <20160619003651.GB38492@www.zefox.net> References: <20160618025517.GA38492@www.zefox.net> <20160618043430.28E93406057@ip-64-139-1-69.sjc.megapath.net> <20160619003651.GB38492@www.zefox.net> Content-Type: text/plain; charset="us-ascii" X-Mailer: Evolution 3.16.5 FreeBSD GNOME Team Port Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: "Porting FreeBSD to ARM processors." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 20 Jun 2016 17:00:04 -0000 On Sat, 2016-06-18 at 17:36 -0700, bob prohaska wrote: > On Fri, Jun 17, 2016 at 09:34:30PM -0700, Hal Murray wrote: > > > > How solid is your power? > > > > The three RPI2s that I can check easily are all over 5 Volts. The > fourth is hard to get at, but it shares the same power supply type > and is unlikely to be significantly different. > > Swapping places between the two adapters that locked up with the > two that kept working didn't turn out as planned. The two adapters > that were failing still failed, but one that hadn't failed up to > then did, in about 48 hours. > > The one encouragement is that updating to r301978 and rebooting > unstuck an adapter that had locked up under r301569. Up to now > it's been necessary to expose the adapters to Prolific's driver > to unstick them. Unplugging and replugging didn't help. > > There seem to be nine supported USB-serial adapter types, can you > suggest a better bet if I have to go shopping again? I can't find > kind words about any of them. > > Thanks for reading! > > bob prohaska While I've heard more good things than bad about freebsd's support of pl2303, the one I can personally vouch for is FTDI. We use them extensively at $work, which means basically I get paid to maintain the freebsd driver for them. While FTDI adapters are great, there have been problems with counterfeit hardware. Buy from a reputable source, and if somebody is offerring a crazy-low price on them, it's probably not genuine FTDI. -- Ian