| Summary: | agetty: unrecognized characters after login (systemd) | ||
|---|---|---|---|
| Product: | buildroot | Reporter: | khozaei <iot> |
| Component: | Other | Assignee: | unassigned |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | buildroot |
| Priority: | P5 | ||
| Version: | 2019.02.2 | ||
| Target Milestone: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Host: | Target: | ||
| Build: | |||
I found the solution finally. I added `--flow-control` option to agetty in `serial-getty@.service` and this option fixed my problem. > **-h, --flow-control** > Enable hardware (RTS/CTS) flow control. It is left up to the > application to disable software (XON/XOFF) flow protocol where > appropriate. |
I have a problem with agetty. when the login prompt gets the user name, then the password prompt or login shell shows unrecognized characters as below: ============================= [ OK ] Started Serial Getty on ttymxc4. [ OK ] Reached target Login Prompts. [ OK ] Stopped Network Name Resolution. [FAILED] Failed to start Network Name Resolution. See 'systemctl status systemd-resolved.service' for details. [ OK ] Stopped Network Time Synchronization. [FAILED] Failed to start Network Time Synchronization. See 'systemctl status systemd-timesyncd.service' for details. [ OK ] Stopped Network Name Resolution. [FAILED] Failed to start Network Name Resolution. See 'systemctl status systemd-resolved.service' for details. [ OK ] Stopped Network Time Synchronization. [FAILED] Failed to start Network Time Synchronization. See 'systemctl status systemd-timesyncd.service' for details. [ OK ] Stopped Network Name Resolution. [FAILED] Failed to start Network Name Resolution. See 'systemctl status systemd-resolved.service' for details. [ OK ] Stopped Network Time Synchronization. [FAILED] Failed to start Network Time Synchronization. See 'systemctl status systemd-timesyncd.service' for details. [ OK ] Started OpenSSH server daemon. [ OK ] Reached target Multi-User System. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Welcome to F+S i.MX6 fsimx6 login: root �cs��ٓ =============================== After that any keys that I press will create other random unrecognized characters. My serial-getty@.service file's content is as below: =============================== [Unit] Description=Serial Getty on %I Documentation=man:agetty(8) man:systemd-getty-generator(8) Documentation=http://0pointer.de/blog/projects/serial-console.html BindsTo=dev-%i.device After=dev-%i.device systemd-user-sessions.service plymouth-quit-wait.service getty-pre.target After=rc-local.service # If additional gettys are spawned during boot then we should make # sure that this is synchronized before getty.target, even though # getty.target didn't actually pull it in. Before=getty.target IgnoreOnIsolate=yes # IgnoreOnIsolate causes issues with sulogin, if someone isolates # rescue.target or starts rescue.service from multi-user.target or # graphical.target. Conflicts=rescue.service Before=rescue.service [Service] # The '-o' option value tells agetty to replace 'login' arguments with an # option to preserve environment (-p), followed by '--' for safety, and then # the entered username. ExecStart=-/sbin/getty -L %I 115200 vt100 Type=idle Restart=always UtmpIdentifier=%I TTYPath=/dev/%I TTYReset=yes TTYVHangup=yes KillMode=process IgnoreSIGPIPE=no SendSIGHUP=yes [Install] WantedBy=getty.target ==============================