On 01/29/18 09:19, Fred Smith wrote: > On Mon, Jan 29, 2018 at 07:00:02AM -0500, Pete Geenhuizen wrote: >> >> On 01/28/18 20:15, Fred Smith wrote: >> Thanks for the suggestion. >> >> I looked at them with setserial, but I have no familiarity with the >> program to know what to change. >> >> setserial -ag /dev/ttyS* >> /dev/ttyS0, Line 0, UART: 16550A, Port: 0x03f8, IRQ: 4 >> Baud_base: 115200, close_delay: 50, divisor: 0 >> closing_wait: 3000 >> Flags: spd_normal skip_test >> >> /dev/ttyS1, Line 1, UART: 16550A, Port: 0x8000, IRQ: 17 >> Baud_base: 115200, close_delay: 50, divisor: 0 >> closing_wait: none >> Flags: spd_normal skip_test >> >> /dev/ttyS2, Line 2, UART: 16550A, Port: 0x8400, IRQ: 17 >> Baud_base: 115200, close_delay: 50, divisor: 0 >> closing_wait: none >> Flags: spd_normal skip_test >> >> /dev/ttyS3, Line 3, UART: unknown, Port: 0x02e8, IRQ: 3 >> Baud_base: 115200, close_delay: 50, divisor: 0 >> closing_wait: 3000 >> Flags: spd_normal >> >> I changed the closing_wait: on ttyS1 to match ttyS0, but that didn't >> do anything, so there must be more to it. >> >> Pete > it has been so many years since I've fooled with a serial port that I > don't remember any details. however, this page may prove helpful, it > appears to contain a lot of potentially useful info: > > http://www.tldp.org/HOWTO/Serial-HOWTO-8.html > > and also this one (linked from the document above: > > http://www.tldp.org/HOWTO/Serial-HOWTO-16.html#slow_ > > Fred > It's been many years for me as well. From C4 to C6 it just worked and I thought nothing more of it, but now I'm confronted with this issue. Thanks for the info and the links hopefully I can glean something out of it that will solve my dilemma. Pete -- Unencumbered by the thought process. -- Click and Clack the Tappet brothers -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.