# Mender-connect get "read /dev/ptmx:input/output error"

**URL:** https://hub.mender.io/t/mender-connect-get-read-dev-ptmx-input-output-error/4094
**Category:** General Discussions
**Created:** [September 18, 2021, 8:36am UTC](https://hub.mender.io/t/mender-connect-get-read-dev-ptmx-input-output-error/4094 "2021-09-18T08:36:45Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![lijiahui](https://avatars.discourse-cdn.com/v4/letter/l/f1d935/32.png) [@lijiahui](https://hub.mender.io/u/lijiahui)
#### Post date: [September 18, 2021, 8:36am UTC](https://hub.mender.io/t/mender-connect-get-read-dev-ptmx-input-output-error/4094/1 "2021-09-18T08:36:45Z")

</div>

when I try to connect my linux device by mender-connect,I got this error.  
time=“2021-09-18T16:24:12+08:00” level=error msg=“error reading stdout: read /dev/ptmx: input/output error”  
time=“2021-09-18T16:24:12+08:00” level=info msg=“session 0c8759e9-3dba-4e80-89ea-323b89fa1dfb status:0 stopping shell”  
time=“2021-09-18T16:24:16+08:00” level=error msg=“session 0c8759e9-3dba-4e80-89ea-323b89fa1dfb, shell pid 2449144, termination error: error waiting for the process: exit status 2”

I used “systemctl status mender-connect” to print it.have anyone see this error before and fixed it?