Comments on: Xen console grabbded /dev/ttyS0 http://phaq.phunsites.net/2007/06/30/xen-console-grabbded-devttys0/ my daily IT madness Sun, 05 Feb 2012 17:47:52 +0000 hourly 1 http://wordpress.org/?v=3.0.3 By: Kara http://phaq.phunsites.net/2007/06/30/xen-console-grabbded-devttys0/comment-page-1/#comment-155 Kara Mon, 13 Sep 2010 14:17:11 +0000 http://phaq.phunsites.net/2007/06/30/xen-console-grabbded-devttys0/#comment-155 Thank you! Though this article has been around for awhile it took me a surprising amount of time to find it. I needed ttys0 for the new APC UPS that we installed, and couldn't figure out how to connect it. I finally found an article from APC that with Xen installed, the APC may not work over a com port. Which eventually led me here. Thanks for documenting the fix. Thank you! Though this article has been around for awhile it took me a surprising amount of time to find it. I needed ttys0 for the new APC UPS that we installed, and couldn’t figure out how to connect it. I finally found an article from APC that with Xen installed, the APC may not work over a com port. Which eventually led me here. Thanks for documenting the fix.

]]> By: corsair8575 http://phaq.phunsites.net/2007/06/30/xen-console-grabbded-devttys0/comment-page-1/#comment-154 corsair8575 Wed, 13 Aug 2008 23:17:02 +0000 http://phaq.phunsites.net/2007/06/30/xen-console-grabbded-devttys0/#comment-154 well after much bashing brains i figured it out to get console working enabling bios redirect -> kernel messages -> booted login console. disable in grub.conf or bios redirection will cause grub to hang! Let bios do the redirection not grub!!!! #serial --unit=0 --speed=9600 #terminal --timeout=0 serial console set options as so for kernel kernel /boot/xen.gz-2.6.18-92.1.6.el5 com1=9600 console=com1 module /boot/vmlinuz-2.6.18-92.1.6.el5xen ro root=LABEL=/ xencons=xvc console=xvc module /boot/initrd-2.6.18-92.1.6.el5xen.img then in your /etc/inittab add entry by the runlevels: SC:12345:respawn:/sbin/mingetty xvc0 1:2345:respawn:/sbin/mingetty tty1 ... There you go finally the xen ttys0 nuisance is consolable! well after much bashing brains i figured it out to get console
working enabling bios redirect -> kernel messages -> booted login console.

disable in grub.conf or bios redirection will cause grub to hang!
Let bios do the redirection not grub!!!!
#serial –unit=0 –speed=9600
#terminal –timeout=0 serial console

set options as so for kernel
kernel /boot/xen.gz-2.6.18-92.1.6.el5 com1=9600 console=com1
module /boot/vmlinuz-2.6.18-92.1.6.el5xen ro root=LABEL=/ xencons=xvc console=xvc
module /boot/initrd-2.6.18-92.1.6.el5xen.img

then in your /etc/inittab add entry
by the runlevels:
SC:12345:respawn:/sbin/mingetty xvc0
1:2345:respawn:/sbin/mingetty tty1
…

There you go finally the xen ttys0 nuisance is consolable!

]]> By: Gianpaolo Del Matto http://phaq.phunsites.net/2007/06/30/xen-console-grabbded-devttys0/comment-page-1/#comment-153 Gianpaolo Del Matto Fri, 23 Nov 2007 20:38:56 +0000 http://phaq.phunsites.net/2007/06/30/xen-console-grabbded-devttys0/#comment-153 @arun 1. my article says exactly how to disable the xen virtual console 2. for information about Xen virtual machine monitor please read the fine manual at http://www.cl.cam.ac.uk/research/srg/netos/xen/ You will have to figure 3. and 4. on your own, I have no experience in serial port programming at all. Greeetings Gianpaolo @arun

1. my article says exactly how to disable the xen virtual console
2. for information about Xen virtual machine monitor please read the fine manual at http://www.cl.cam.ac.uk/research/srg/netos/xen/

You will have to figure 3. and 4. on your own, I have no experience in serial port programming at all.

Greeetings
Gianpaolo

]]> By: Arun http://phaq.phunsites.net/2007/06/30/xen-console-grabbded-devttys0/comment-page-1/#comment-152 Arun Tue, 13 Nov 2007 12:11:09 +0000 http://phaq.phunsites.net/2007/06/30/xen-console-grabbded-devttys0/#comment-152 hello, when I run command:::::::::::::::::dmesg |grep tty Xen virtual console successfully installed as ttyS0 I am not getting whats actually going on with my serial ports..... I am writing code which is fully dependent on setial communication....due to this I am not able to use my serial port. 1.)So any method to come out of this problem....... 2.)Moreover can you guide me in details what is this virtual console....and why it is not allowing me to use my serial port..... 3.)Steps to follow while doing serial programming. 4.) Any commands which can verify that my serial port is recieving data or sending data or any tool to do such ..... thanks & regards, Arun hello,
when I run command:::::::::::::::::dmesg |grep tty
Xen virtual console successfully installed as ttyS0

I am not getting whats actually going on with my serial ports…..
I am writing code which is fully dependent on setial communication….due to this I am not able to use my serial port.
1.)So any method to come out of this problem…….
2.)Moreover can you guide me in details what is this virtual console….and why it is not allowing me to use my serial port…..
3.)Steps to follow while doing serial programming.
4.) Any commands which can verify that my serial port is recieving data or sending data or any tool to do such …..

thanks & regards,
Arun

]]> By: Tim http://phaq.phunsites.net/2007/06/30/xen-console-grabbded-devttys0/comment-page-1/#comment-151 Tim Mon, 09 Jul 2007 16:00:17 +0000 http://phaq.phunsites.net/2007/06/30/xen-console-grabbded-devttys0/#comment-151 Thanks much. I've spent a week on and off looking around, looking for a good simple fix. Thanks much. I’ve spent a week on and off looking around, looking for a good simple fix.

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