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Date: Sat, 20 Mar 1999 22:30:25 -0800 (PST)
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From: <paulrose@demon.net>
Subject: kern/10673: Non-ASCII chars on serial console with RealTek 8139 at 100M FD.
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The following reply was made to PR kern/10673; it has been noted by GNATS.

From: <paulrose@demon.net>
To: FreeBSD-gnats-submit@freebsd.org
Cc:  
Subject: kern/10673: Non-ASCII chars on serial console with RealTek 8139 at 100M FD.
Date: Fri, 19 Mar 1999 17:17:56 +0000

 >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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