Petr, it seems that the port is now working (I rebooted the machine -- if that didn't log me off, I don't know what would :-) ).
I still can't get the rig control to work at all.  I've included all the debug data below as well as a screenshot of the program.  I clicked on several options on the control, but the radio ignored everything.  Any ideas how I could get this working?
 
Here's the debug data from the terminal
**** DEBUG LEVEL 1 ****Loading libssl: /usr/lib/x86_64-linux-gnu/libssl.so
Loading libcrypto: /usr/lib/x86_64-linux-gnu/libcrypto.so
Loading libmysqlclient: /usr/lib/x86_64-linux-gnu/libmysqlclient.so.18
**************************MySQL version: 5.5**************************MySQL version assigned:  5.500000000000000000E+00**********************************
Loaded 86664 LoTW usersLoaded 93104 eQSL usersLoaded 46549 SCP callsIniFile:/home/fred/.config/cqrlog/cqrlog.cfgLocalIniFile:/home/fred/.config/cqrlog/local.cfg*User home directory:    /home/fred/Program home directory: /home/fred/.config/cqrlog/Data directory:         /home/fred/.config/cqrlog/database/Memebers directory:     /usr/share/cqrlog/members/ZIP code directory:     /usr/share/cqrlog/zipcodes/Binary dir:             /usr/bin/Share dir:              /usr/share/cqrlog/TConnection to MySQL:   5.5*Trying to connect to database150830 15:59:24 [Note] /usr/sbin/mysqld (mysqld 5.5.44-MariaDB-1ubuntu0.14.04.1) starting as process 13346 ...Server connect failed.Trying:1Trying to connect to databaseServer connect failed.Trying:2select * from tables where table_schema = 'cqrlog_common'SELECT log_nr,log_name FROM cqrlog_common.log_list order by log_nruse cqrlog001use cqrlog001use cqrlog001use cqrlog001SELECT * FROM cqrlog_configIniFile:/home/fred/.config/cqrlog/1cqrlog.cfgLocalIniFile:/home/fred/.config/cqrlog/1local.cfgLocalSections:select * from db_versionselect * from cqrlog_common.db_versionSELECT * FROM cqrlog_common.dxcc_ref ORDER BY ADIFSELECT * FROM cqrlog_common.dxcc_ref ORDER BY ADIFSettings:-----------------------------------------------------RigCtldPath:/usr/bin/rigctldRigCtldArgs:-m 363 -r /dev/ttyUSB0 -t 4532  RunRigCtld: TRUERigDevice:  /dev/ttyUSB0RigCtldPort:4532RigCtldHost:localhostRigPoll:    500RigSendCWR: FALSERigId:      363Starting RigCtld .../usr/bin/rigctld -m 363 -r /dev/ttyUSB0 -t 4532  rigctld started!Connected to localhost:4532Settings:-----------------------------------------------------RotCtldPath:/usr/bin/rotctldRotCtldArgs:RunRotCtld: FALSERotDevice:  RotCtldPort:4533RotCtldHost:localhostRotPoll:    500RotId:      1rotctld started!Connected to localhost:4533CW initSELECT * FROM profiles WHERE visible > 0 ORDER BY nrSELECT * FROM profiles WHERE visible > 0 ORDER BY nr11a23456Settings:-----------------------------------------------------RigCtldPath:/usr/bin/rigctldRigCtldArgs:-m 363 -r /dev/ttyUSB0 -t 4532  RunRigCtld: TRUERigDevice:  /dev/ttyUSB0RigCtldPort:4532RigCtldHost:localhostRigPoll:    500RigSendCWR: FALSERigId:      363Starting RigCtld .../usr/bin/rigctld -m 363 -r /dev/ttyUSB0 -t 4532  rigctld started!Connected to localhost:4532123456Settings:-----------------------------------------------------RotCtldPath:/usr/bin/rotctldRotCtldArgs:RunRotCtld: FALSERotDevice:  RotCtldPort:4533RotCtldHost:localhostRotPoll:    500RotId:      1rotctld started!Connected to localhost:4533Sending: M AM 3000Sending: M FM 2500Sending: M LSB 1800Sending: M LSB 1800Sending: M LSB 1800Sending: M LSB 1800Sending: M LSB 1800Sending: M FM 2500Sending: M LSB 180011a23456Settings:-----------------------------------------------------RigCtldPath:/usr/bin/rigctldRigCtldArgs:-m 363 -r /dev/ttyUSB0 -t 4532  RunRigCtld: TRUERigDevice:  /dev/ttyUSB0RigCtldPort:4532RigCtldHost:localhostRigPoll:    500RigSendCWR: FALSERigId:      363Starting RigCtld .../usr/bin/rigctld -m 363 -r /dev/ttyUSB0 -t 4532  rigctld started!Connected to localhost:4532123456Settings:-----------------------------------------------------RotCtldPath:/usr/bin/rotctldRotCtldArgs:RunRotCtld: FALSERotDevice:  RotCtldPort:4533RotCtldHost:localhostRotPoll:    500RotId:      1rotctld started!Connected to localhost:4533SELECT * FROM profiles WHERE visible > 0 ORDER BY nrSELECT * FROM profiles WHERE visible > 0 ORDER BY nrSELECT * FROM profiles WHERE visible > 0 ORDER BY nrDBPing - select * from cqrlog001.db_versionDBPing - select * from cqrlog001.db_versionDBPing - select * from cqrlog001.db_versionDBPing - select * from cqrlog001.db_versionSELECT * FROM profiles WHERE visible > 0 ORDER BY nrselect count(*) from cqrlog001.cqrlog_configSaving ini file to databaseOnCloseQuery - NewQSO11a23456
Closing Details windowselect count(*) from cqrlog001.cqrlog_configSaving ini file to databaseselect count(*) from cqrlog001.cqrlog_configSaving ini file to database123456Closing DXCluster windowClosing TRXControl windowClosing GrayLine windowClosing dDXCCDeleting config file: 1cqrlog.cfgDeleting config file: cqrlog.cfgClosing dData/home/fred/.config/cqrlog/database/Fred.pidCommand: kill 13346(cqrlog:13342): GLib-CRITICAL **: Source ID 11 was not found when attempting to remove it(cqrlog:13342): GLib-CRITICAL **: Source ID 10 was not found when attempting to remove it(cqrlog:13342): GLib-CRITICAL **: Source ID 43 was not found when attempting to remove it(cqrlog:13342): GLib-CRITICAL **: Source ID 42 was not found when attempting to remove it(cqrlog:13342): GLib-CRITICAL **: Source ID 48 was not found when attempting to remove it(cqrlog:13342): GLib-CRITICAL **: Source ID 47 was not found when attempting to remove itClosing ini file ...

Thank you so very much for sorting that out for me!  I read a reply to someone else about leaving things at default which worked for him that I thought I should do the same.  But after reading your post, I changed (only) the port speed, and it worked perfectly!
 
Again, thanks!
 
73's