HP AD278A and AD279A PCI Multiplexer Support Guide, November 2008

2 Troubleshooting
This chapter describes how to use the pmux_diag diagnostic utility. It also describes how to
troubleshoot the terminal, printers, and modem installation problems after the ports are configured
and enabled.
This chapter addresses the following topics:
“The pmux_diag Utility” (page 15)
“The pmux_diag Utility Conventions” (page 15)
“Driver Status Menu Selections” (page 16)
“Port Status Menu Selections” (page 19)
“Quit” (page 24)
“Excessive Frequent getty Spawning” (page 25)
“Terminal Login Problems” (page 25)
“Printer Problems” (page 26)
“Connecting a Modem” (page 27)
“System Crashes or Panics” (page 28)
The pmux_diag Utility
The pmux_diag utility is a stand-alone program that supports diagnostic operations. All diagnostic
operations are supported by the pmux_diag utility in the current release.
Starting pmux_diag Utility
To start the pmux_diag utility, complete the following steps:
1. Log in to the system as super user.
2. Run the following command at the command prompt:
$ /usr/bin/pmux_diag
3. Press Enter. The main menu displays the following options:
• Driver Status
• Port Status
• Diagnostics
• Quit
The pmux_diag Utility Conventions
Table 2-1 lists the conventions used to run the pmux_diag utility.
Table 2-1 pmux_diag Key Conventions
PurposeKeys
To move between menus and menu selections.Arrow
To move out of sub-menusEsc (escape)
To select the highlighted menu itemReturn
To display a context sensitive helpF1
Exiting pmux_diag Utility
To exit the pmux_diag utility, complete the following steps:
The pmux_diag Utility 15