7 troubleshooting, Kernel debugging – HP Integrated Lights-Out 4 User Manual
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7 Troubleshooting
This chapter provides troubleshooting solutions for HP iLO.
Kernel debugging
Use the Windows Windbg kernel debugger from a local test system (usually a laptop) for a host
server that you want to debug. This method uses the iLO Virtual Serial Port feature.
NOTE:
You must have PuTTY installed on your test system. You can download PuTTY from
1.
Using the iLO web interface on the host server with kernel issues, navigate to the
Administration
→Access Settings page and configure the Serial Command Line Interface Speed
setting.
2.
Configure the debug options in Windows (the boot.ini parameters for the serial connection).
Use debugport=com2, and set the baud rate to match the settings in the iLO web interface.
3.
During POST, press F9 to enter the system RBSU or UEFI System Utilities.
4.
From the main menu, disable EMS and BIOS Serial Console.
For detailed instructions, see the HP ROM-Based Setup Utility User Guide.
5.
Set the Virtual Serial Port to COM 2.
For detailed instructions, see the HP ROM-Based Setup Utility User Guide.
6.
Reboot the host server to access the selection menu for the Windows debug boot option.
7.
From the local test system, use PuTTY to connect to iLO and log in.
This is a CLI connection to iLO.
8.
Enter the IP address for the session host name. Use the default settings for an SSH session.
When the PuTTY iLO CLI session opens, a user login window opens, unless the PuTTY session
is configured to use private keys. For more information, see
and
“Administering SSH keys” (page 64)
.
It might take a minute for the prompt to appear.
9.
At the hpiLO-> prompt, enter the following command:
windbg_enable
This opens a socket to the Virtual Serial Port on port 3002.
10. Enter the following command to start the Windows debugger:
windbg -k com:port=
is the iLO IP address, and 3002 is the socket to connect to (the raw serial
data socket for iLO).
NOTE:
You can add other windbg command-line parameters if necessary. HP recommends
using the -b parameter for the initial breakpoint.
11. Go to the server console (or access the iLO Remote Console), and press Enter to boot the
debug selection on the OS load menu.
This might take several minutes.
298 Troubleshooting