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| Sun Installation Assistant 2.3 through 2.4 User's Guide for x64 Servers Sun Fire X4640 Server Documentation Library

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## How to Debug a PXE Image That Does Not Boot

1. Check the DHCP and TFTP server areas and the integrity of the `netboot.img` and `vmlinuz` files.
2. Verify that the kernel boot arguments are correct by consulting the PXE-example configuration (`boot/isolinux/isolinux.cfg`) provided on the SIA CD/DVD.
3. Verify that the URLs in the SIA state file, Kickstart file, or AutoYaST file are correct. To determine whether the URLs are correct:
   1. Test the URL with the command `wget` URL.
   2. Verify that the DNS is working or use IP addresses instead of host names.
   3. Check the following table for URL errors that you might encounter.

      Problem | What you will see
      --- | ---
      The state file URL (siaurl) is incorrect. | If the state file URL (siaurl) is incorrect, the installation appears to hang. Check the console for the following error message that appears after the VNC information: `Unable to fetch unattended statefile:` URL
      The InstallLoc in the state file URL (siaurl) is incorrect. | The system reboots without an error message and the console displays messages such as the following message before rebooting: `Can’t MD5 ..`.
      The Kickstart entry in state file URL (siaurl) is incorrect. | The installation appears to hang and the console displays the following message: `apit-magic: run: /installer/..."`
      A parameter in the URL file is incorrect. | When connecting to VNC, you will see that the unattended network installation stopped and is waiting for input.

4. Verify that the VNC password is properly set.

   If the VNC password was not set, the following message displays on the console:

       mv /dev/tty /dev/tty-node
       ln -s /proc/self/fd/0 /dev/tty
       echo password
       /usr/X11R6/bin/vncpasswd.real /installer/vncpasswd
       echo password
       They don’t match. Try again.

   This issue is a timing problem. To resolve this problem, reboot the system and restart the installation.

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