Hello I hope this is the right list,if not please advise. In my work I have been using and writing code to use rs232 serial ports going back to before the first IBM PC. Currently I primarily use USB to serial adapters, made by Prolific (PL2303) and Belkin(F5U109/F5U409). These devices are anything but new going back more than ten years at least in the Belkin case and I have been using them about that long. I have always been impressed how Linux & specifically Fedora/RedHat recognize these devices with no fuss or fanfare. I have just come across an anomaly that to me indicates a change in the F29 release that I hope someone will find interesting. Recently I needed to run a series of tests to verify data exchange at various baud rates. The tests have been performed on Fedora 29: (4.19.10-300.fc29.x86_64) and CentOS 7.6: (3.10.0-957.1.3.el7.x86_64) systems. The tests involved sending data from one system to the other and then reversing the role of each system. On both systems the Prolific device supported baud rates: 200,300,600,1200,1800,2400,4800,9600,19200,38400,57600 & 115200 On the CentOS 7.6 system the Belkin device supported baud rates: 300,600,1200,2400,4800,9600,19200,38400,57600 & 115200 On the Fedora 29 system the Belkin device only supported baud rates: 4800 & 9600 This was the surprise. As long as I have been using these devices on Fedora I am comfortable stating that I would have noticed this limitation long ago. Also, I am currently using three of the Belkin devices and they all have the same performance so I don't think device failure is the cause. If anyone would like me to run any additional tests please let me know. thanks -- Roger Wells, P.E. leidos 221 Third St Newport, RI 02840 401-847-4210 (voice) 401-849-1585 (fax) roger.k.wells@xxxxxxxxxx _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx
