Date: Fri, 19 Mar 1999 17:17:56 +0000 From: <paulrose@demon.net> To: FreeBSD-gnats-submit@freebsd.org Subject: kern/10673: Non-ASCII chars on serial console with RealTek 8139 at 100M FD. Message-ID: <E10O2uC-0001c6-00@grover.noc.demon.net>
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>Number: 10673
>Category: kern
>Synopsis: Non-ASCII chars on serial console with RealTek 8139 at 100M FD.
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Fri Mar 19 09:20:02 PST 1999
>Closed-Date:
>Last-Modified:
>Originator: Paul Rose
>Release: FreeBSD 3.1-STABLE i386 from just before 1st March 1999.
>Organization:
>Environment:
Apologies for not knowing the exact day of the release, or any appropriate
CVS IDs to include. The machine has a RealTek 8139 10/100BaseTX card. The
console is via the serial port, and /boot/loader.rc contains
'set console=comconsole'. sio0 has the following entry in the kernel
config.
device sio0 at isa? port "IO_COM1" flags 0x10 tty irq 4
The link between the NIC and the switch is 100Mbps full duplex. The
following line is contained in /etc/rc.conf, which I've broken up here
onto two lines.
ifconfig_rl0="inet 194.159.80.4 netmask 0xfffffff8
media 100baseTX mediaopt full-duplex"
>Description:
Upon booting the machine, all the relevant boot messages appear via
the serial console. It detects the RealTek card, and sets it up
initially as 10Mbps half-duplex. During the init scripts, when
rc.network is run to configure the interfaces it gets this far:
Doing initial network setup: hostname
lo0
and then begins to output non-ASCII and control characters to the serial
console such that the console becomes unreadable, though it does continue
to boot. Logging into the machine, checking dmesg, and the interface
shows that it has set itself to 100Mbps full-duplex and appears to work
correctly. Booting with boot -v gives the following for rl0
rl0: <RealTek 8139 10/100BaseTX> rev 0x10 int a irq 19 on pci0.9.0
using shared irq19.
rl0: Ethernet address: 00:a0:d2:1a:b7:65
rl0: PHY status word: 782d
rl0: 10Mbps half-duplex mode supported
rl0: 10Mbps full-duplex mode supported
rl0: 100Mbps half-duplex mode supported
rl0: 100Mbps full-duplex mode supported
rl0: autoneg supported
rl0: autoneg complete, link status good (half-duplex, 10Mbps)
bpf: rl0 attached
On leaving the media and mediaopt options from ifconfig_rl0, the card
defaults itself to 10Mbs half-duplex and when rc.network is run outputs
only ASCII chars as expected and does not lead to the same 'rubbish' on
the serial console.
Only when the card was set to 100Mbps full-duplex did the non-ASCII chars
get printed via the serial console. This was repeatable each time the
machine was rebooted. The problem was not present when a different
brand/make of NIC was swapped with the RealTek, and set to 100Mbps
full-duplex.
>How-To-Repeat:
Hopefully this will be repeatable each time you reboot a machine that has
its console go via the serial port, and has a RealTek 8139 card which you
have to set to 100Mbps full-duplex through rc.conf.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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