[Xen-users] Messy "xm console" output and frequently not responding

[unicell <unicell@xxxxxxxxx>]

Hi All,

I'm running several linux HVM guests on top of Xen 3.1.2 version. And when I use "xm console" to connect one guest machine, the message is messed up like below and after I hit "Enter" serveral times, the console stops responding.

[root@est6 ~#
              oot@est6 ~]#
                           rot@test6 ~#
                                        oot@st6 ~]# root@test6 ~]#
                                                                   root@est ~]
                                                                               root@test ~]#

If I ssh into the guest, everything just looks fine. No warning message in dmesg or /var/log/message.

Settings in guest /etc/inittab

> co:2345:respawn:/sbin/agetty ttyS0 115200 vt100

Lines in guest /boot/grub/menu.lst

title Red Hat Enterprise Linux AS (2.6.9)
         root (hd0,0)
         kernel /boot/vmlinuz-2.6.9 ro root=/dev/hda1 console=ttyS0,115200n8
         initrd /boot/initrd-2.6.9.img

Other things I've tried. I checked xenstore setting, and this guest domain use /dev/pts/9 to communicate to guest serial interface. So I tried minicom to communicate to guest using /dev/pts/9 device. And it still has the same problem.

I highly suspect it has something to do with this guest's terminal setting, because other Linux HVM guest's console running on this host just working fine. 

Guest's terminal setting after ssh into it. Tried to change terminal setting via "stty speed 115200" but still not working.

[root@test6 ~]# stty -a
speed 38400 baud; rows 52; columns 144; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>; eol2 = <undef>; start = ^Q; stop = ^S; susp = ^Z; rprnt = ^R;
werase = ^W; lnext = ^V; flush = ^O; min = 1; time = 0;
-parenb -parodd cs8 -hupcl -cstopb cread -clocal -crtscts
-ignbrk -brkint -ignpar -parmrk -inpck -istrip -inlcr -igncr icrnl ixon -ixoff -iuclc -ixany -imaxbel
opost -olcuc -ocrnl onlcr -onocr -onlret -ofill -ofdel nl0 cr0 tab0 bs0 vt0 ff0
isig icanon iexten echo echoe echok -echonl -noflsh -xcase -tostop -echoprt echoctl echoke

Could anyone kindly provide some advice for me ? Thank you so much!

--
uni
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