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Subject: [Bug 195395] serial console as qemu-kvm guest stops responding
 freezes on duplex I/O
Date: Thu, 27 Nov 2014 08:20:35 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=195395

Taketo Kabe <bkabe@vega.pgw.jp> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|New                         |Closed
         Resolution|---                         |Works As Intended

--- Comment #2 from Taketo Kabe <bkabe@vega.pgw.jp> ---
Workaround:
set hw.broken_txfifo=1
in /boot/loader.conf, /boot/device.hints, wherever suites.

hw.broken_txfifo was added in FreeBSD 8.4 for workaround of QEMU UART emulation
bug.

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