On Mon, Sep 02, 2013 at 06:14:30PM -0500, Roger Davis wrote: I have been pursuing a serial port problem for over a year, using Ubuntu 12.04. I reported it on 2012-12-07, and the bug was confirmed soon after that. I'm not sure if the root cause is in the basic Linux kernel, or if it is only in Ubuntu. Others are having problems with similar modems. The exact same computer and modem (USR 5610C, PCI, 16550 chip, Linux compatible, http://www.usr.com/products/modem/modem-comparison.asp , with integral controller and serial port, NOT a Wimmodem ) works just fine in Windoze. I switch OS's by hardwire switches in removable drive trays, so it is really the exact very same computer, not just another one of the same spec. The serial port ttyS4 seems to be detected, but yet not detected, and not usable by the modem. IRQ 17 also seems to behave oddly. I suspect that internal modems with both controller and integral serial ports have been kinda "overlooked" during coding, so the code gets confused and stumbles? There has been no fix action since I reported it, and the bug is still unassigned. Please see confirmed bug " https://bugs.launchpad.net/ubuntu/+bug/1087519 " for much more details. -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
