On Tuesday 16 November 2004 11:55am, Jed S. Baer wrote: > On Tue, 16 Nov 2004 02:24:34 -0400 Marr wrote: > > On Monday 15 November 2004 04:56pm, Jed S. Baer wrote: > > > Also, by using an approprate level of squinting and other > > > enhancements, I have detected the "send data" LED flickering > > > oh-so-faintly when I hit[RETURN] in minicom, so it appears that data > > > is indeed going up to my ISP(and this is why I prefer external modems > > > -- das blinkenlights are still useful). I'm beginning to think this is > > > not a USB problem. But that leaves me wondering what to look at next. > > > > Jed, > > > > I was preparing a response to your earlier email when I saw this. It > > seems to me that my reply won't be pertinent unless/until you determine > > if this is really a USB problem or not. > > > > I'm guessing that your machine has no RS-232 port or you'd have tried > > the simple test of eliminating the Belkin F5U103 USB/RS-232 adapter. > > > > Short of borrowing a plug-in RS-232 card and/or some Linux-compatible > > USB modem, or trying some other distro with 2.6.9 (or above), I'm > > without ideas. :^( > > Well, I have 4 things needing serial ports. USB is the bane of my > existence. :\ But support for legacy hardware on the part of mobo > manufacturers is fast going away. My current mobo has only one serial > port, and at the very least I need to have my modem and UPS connected -- > it's tough, but I'm doing without the X10 control dongle :). Also, all the > PCI slots are full -- there are only 3 of them, so adding a serial card or > internal modem isn't possible. > > At this point, I don't know what to try next. It's tough to point fingers > at pppd or chat, because it works fine with ttyS0. It might be that either > of those programs is doing something with the tty settings that makes > usbserial or belkin_sa go haywire.
So it sounds like you've already tried disconnecting the UPS and hooking the modem up to the RS-232 serial port for some short-term testing, right? Those 2 modules weren't getting loaded in your earlier report, so I assumed that they were built into the kernel. You might want to build a kernel with those 2 things as modules, then you could turn on debugging for those modules as you unsuccessfully had tried earlier. Armed with that info, you might be better equipped to pose a question on Linux-USB-Devel. > Maybe a line analyzer would provide > some clues, except that if I could afford one of those, I'd just buy a new > mobo with more capacity. > > I'm hesitant to put the UPS on the USB/Serial adapter, until I feel better > about it being a reliable interface. I don't know what sort of UPS you're using, but I've successfully (on a short-term basis) used my APC 'Back-UPS Pro 650' UPS with both my Belkin F5U109 and my IOGear GUC232A USB/RS-232 adapters. See the 'apcupsd' project (http://www.apcupsd.com) for details. The manual (PDF and online HTML) was recently updated by the maintainer, in part because of some of my brief additions about this topic. > The last-ditch "solution" is to buy a USB external modem. The vast > majority of those are software modems. The controller modems are about > twice the price. Regrettably, I need to avoid spending any money I don't > have to. > > Basically, I have evidence, now, which conflicts as to whether this is a > USB problem. But I'm at a point where I don't know what to try next. If > there really is a bug somewhere in the USB toolchain, I'd like to find it, > rather than just shrug and try something else. I feel your pain. :^) It's very possible that the 'belkin_sa' module is the culprit, but I'm somewhat surprised to know that it worked well in 2.4.18 and not in 2.6.9. Sorry that I cannot be of more help here. :^( Bill Marr ------------------------------------------------------- This SF.Net email is sponsored by: InterSystems CACHE FREE OODBMS DOWNLOAD - A multidimensional database that combines robust object and relational technologies, making it a perfect match for Java, C++,COM, XML, ODBC and JDBC. www.intersystems.com/match8 _______________________________________________ [EMAIL PROTECTED] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
