Xen enable serial console

The other computer needs to have the exact same serial port speed, databits, stopbit, parity and flow control settings than the computer running Xen!

First you need to know which COM port you've connected the serial cable to. So first use Windows Device Manager to figure out what serial ports you have and what you're using.

Then you need a terminal emulator program to access the serial port. Windows includes Hyperterminal, but that's not a very good program. You can also use Putty, or Teraterm. There are many other programs for accessing serial ports. Usually any program that can be used for calling with a modem, or to configure an ethernet switch also works for accessing a serial console. Start the terminal emulator program, and configure the correct serial COM port, correct speed, correct settings 8n1 , and flow control.

In linux you can get a list of the serial ports by running "dmesg grep ttyS". You can use for example "minicom", "kermit" or many other tools to view the serial console. You can start minicom with "minicom -s" to enter the setup mode to configure the serial settings.

Another option is to press "Ctrl-A p" when minicom is running to enter the settings dialog. After configuring the settings remember to save them, and then restart minicom.

Read the minicom man-page for more information about the usage. Before connecting, make sure nobody else is using the serial console only one person at a time can connect. You can disconnect a currently connected session using:. When you have connected the computers with a serial cable, you have prepared grub. Now you should first see Xen boot messages on the serial console followed by dom0 Linux kernel boot messages.

There's for example "amtterm" for Linux. If your serial port is on a non-standard IOport, for example 0xe, you can use a grub1 grub. Last ",0" means what IRQ to use.. If you have problems, try using either the real IRQ, or then just 0. This will enable you to login to Xen dom0 from the serial console. Yes, that's possible. If your BIOS doesn't support this, there's also another option. Example grub1 grub.

Jump to: navigation , search. The answer is yes. This can be done, but it is not that trivial. Let me show you how this can be achieved for both fully virtualized and paravirtualized guests. By default, the console should work without any special configurations or tweaks on your end. Unfortunately, life is rarely that fair, so you might to tweak and hack a little. There are several possible workarounds available. You may also specify xvc0 instead of hvc0 and use either of the two extra options one key value pair at a time.

You might need to make several changes and test before you find what works best, if at all. You will need to add this new console to your guest. Please adjust the console name based on what you have specified in the virtual machine configuration. Just open the file and add x0. Please make the necessary backups before making changes.

Success Stories. Investor Relations. Social Impact. Merchandise Store. Communications Preferences. Follow these steps to enable it. Disconnect from the terminal is done with the Ctrl-] key-kombination. Keep in mind that the last line shown on the terminal e. In some configurations, the serial console may hang or get out of synchronization. Join Our Community. Go to Customer Center.