https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=229712
Bug ID: 229712
Summary: no cts/rts for serial port in bhyve connected to
serial port on host
Product: Base System
Version: 11.2-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: misc
Assignee: [email protected]
Reporter: [email protected]
When trying to run ppp(8) inside a VM against a USB serial port on the host, it
appears that CTS/RTS is not handled correctly. While cu(1) can talk to the
modem without issue, ppp(8) just hangs. Setting ctsrts to false in ppp(8) works
around this. On the host, ppp(8) works fine without disabling ctsrts.
The bhyve VM is managed with vm-bhyve, and the USB serial port is exposed to
the VM by -lcom2,/dev/cuaU0. The USB serial port is:
umodem0 on uhub1
umodem0: <HUAWEI Technology HUAWEI Mobile, class 0/0, rev 2.00/1.02, addr 1> on
umodem0: data interface 0, has no CM over data, has no break
This is on 11.2-RELEASE with GENERIC.
Here's some more detail about the setup:
https://lists.freebsd.org/pipermail/freebsd-stable/2018-July/089293.html
Right now I don't have a test case better than trying to set up this exact
scenario.
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