Date: Fri, 27 Nov 2009 13:45:05 -0600 From: Karl Denninger <karl@denninger.net> To: Jeremy Chadwick <freebsd@jdc.parodius.com> Cc: freebsd-stable@freebsd.org Subject: Re: PUC Serial I/O problem - copy of gnats-filed bug report (as discussed previously) Message-ID: <4B102C41.6040205@denninger.net> In-Reply-To: <20091127190319.GA12437@icarus.home.lan> References: <4B100262.6000900@denninger.net> <4B102059.6040003@denninger.net> <20091127190319.GA12437@icarus.home.lan>
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This is a multi-part message in MIME format. --------------050507040909060309060806 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Jeremy Chadwick wrote: > On Fri, Nov 27, 2009 at 12:54:17PM -0600, Karl Denninger wrote: > >> For what its worth, USB-based serial adapters also fail in the same way, >> but faster (they have NEVER been reliable in this regard, and this >> hasn't improved) >> > > There must be a regression of some kind, given that some FreeBSD > developers have stated in the past that FTDI-based USB serial adapters > work great: > > http://lists.freebsd.org/pipermail/freebsd-stable/2008-March/041615.html > > Original thread: > > http://lists.freebsd.org/pipermail/freebsd-stable/2008-March/041610.html > I don't know where "works great" has come from. Certainly not my experience in "heavy" use. For non-modem-control heavy use, it works ok. I use an 8-port fanout on 7.x to drive process control and it's stable. However, for heavy modem use (e.g. Hylafax) it has NEVER been stable - although in 8.x it won't even manage to send ONE 10-page fax most of the time, where under 7.x it would randomly fail in that use. Then again the puc() driver based serial I/O was completely stable under 7.x and now, with the "new architecture" it will get one or two jobs through it before it blows up. -- Karl --------------050507040909060309060806--
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