Bug 179115 - [uart] Writing to uart1 causes host to hang
Summary: [uart] Writing to uart1 causes host to hang
Status: Open
Alias: None
Product: Base System
Classification: Unclassified
Component: i386 (show other bugs)
Version: 9.1-RELEASE
Hardware: Any Any
: Normal Affects Only Me
Assignee: freebsd-i386 (Nobody)
Depends on:
Reported: 2013-05-30 20:40 UTC by Majdi S. Abbas
Modified: 2017-12-31 22:27 UTC (History)
0 users

See Also:


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Description Majdi S. Abbas 2013-05-30 20:40:00 UTC
Opening /dev/cuau1 works successfully; incoming data arrives and is
read just fine.  stty verifies parameters normally, and this is a
standard serial port on real hardware (no USB or anything else involved

Any attempt to write to /dev/cuau1 while open causes the system to hang;
it returns ping and completes 3 way handshakes but is unresponsive via
ssh and on console.

Same cabling, same configuration works on another OS.  Levels have been
verified with a digital volt meter, and RS232 analyzer.

How-To-Repeat: 100% repeatable with either my build or GENERIC from boottime.
Comment 1 Eitan Adler freebsd_committer freebsd_triage 2017-12-31 08:00:30 UTC
For bugs matching the following criteria:

Status: In Progress Changed: (is less than) 2014-06-01

Reset to default assignee and clear in-progress tags.

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