Hi Sir
Branched serial port from TUSB7340 -> GL850 -> CP2108 failed set request when turn on & off sequentially.
Below is is the log, could you help to check why request fail?
Thank you.
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user01@user01-HP-Z2-Tower-G4-Workstation:~$ telnet 192.168.2.100 2001 Trying 192.168.2.100... Connected to 192.168.2.100. Escape character is '^]'. DMC-12 login: console Password: Last login: Wed Feb 19 08:59:59 UTC 2020 from remote on pts/0 You are connected to /dev/P1 (115200 N81) aaaaaaaaaaaa telnet> quit Connection closed. user01@user01-HP-Z2-Tower-G4-Workstation:~$ telnet 192.168.2.100 2002 Trying 192.168.2.100... Connected to 192.168.2.100. Escape character is '^]'. DMC-12 login: console Password: Last login: Wed Feb 19 09:10:05 UTC 2020 from remote on pts/0 You are connected to /dev/P2 (115200 N81) bbbbbbbbbbb telnet> ^[[A ?Invalid command telnet> open 192.168.2.100 2003 ?Already connected to 192.168.2.100 telnet> close Connection closed. user01@user01-HP-Z2-Tower-G4-Workstation:~$ telnet 192.168.2.100 2003 Trying 192.168.2.100... Connected to 192.168.2.100. Escape character is '^]'. DMC-12 login: console Password: Last login: Wed Feb 19 09:10:29 UTC 2020 from remote on pts/0 You are connected to /dev/P3 (115200 N81) eeeeerrrrrr telnet> q Connection closed. user01@user01-HP-Z2-Tower-G4-Workstation:~$ telnet 192.168.2.100 2004 Trying 192.168.2.100... Connected to 192.168.2.100. Escape character is '^]'. DMC-12 login: console Password: Last login: Wed Feb 19 09:11:10 UTC 2020 from remote on pts/0 You are connected to /dev/P4 (115200 N81) cccccccc telnet> q Connection closed. user01@user01-HP-Z2-Tower-G4-Workstation:~$ telnet 192.168.2.100 2005 Trying 192.168.2.100... Connected to 192.168.2.100. Escape character is '^]'. DMC-12 login: console Password: Last login: Wed Feb 19 09:11:33 UTC 2020 from remote on pts/0 You are connected to /dev/P5 (115200 N81) ddddddddddddd telnet> q Connection closed. user01@user01-HP-Z2-Tower-G4-Workstation:~$ telnet 192.168.2.100 2006 Trying 192.168.2.100... Connected to 192.168.2.100. Escape character is '^]'. DMC-12 login: console Password: Last login: Wed Feb 19 09:12:05 UTC 2020 from remote on pts/0 Connection closed by foreign host. user01@user01-HP-Z2-Tower-G4-Workstation:~$
When entering 2006 (port 6), the request is fail and pop below error message: [ 177.964613] cp210x ttyUSB8: failed set request 0x12 status: -110 [ 183.084606] cp210x ttyUSB8: failed set request 0x0 status: -110 [ 195.884602] cp210x ttyUSB9: failed set request 0x0 status: -110 [ 195.890523] cp210x ttyUSB9: cp210x_open - Unable to enable UART
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