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An RH2285 Automatically Displays the BIOS Setup Interface

Publication Date:  2015-06-18 Views:  96 Downloads:  0
Issue Description
Each time the RH2285 is started, the basic input/output system (BIOS) setup interface is displayed automatically, and OS booting cannot be implemented.

Handling Process
1.  Check that the keyboard works properly, and you do not press ~ or Delete.

2.  Check that no jumper cap is on the third pair of jumpers from right to left of the position shown in Figure 1.

Figure 1 Jumper position



Jumper caps are used for switchover between the system serial port and the management serial port. When jumper caps are installed, the DB9 serial port connector serves as a BMC management serial port. When jumper caps are removed, the DB9 serial port connector serves as a system serial port, and the RH2285 has a peripheral that sends serial port data to the RH2285, as shown in Figure 2.

Figure 2 Serial port position



When the "Remote Access" for serial port redirection is enabled in the BIOS, the peripheral connected to the DB9 serial port connector sends serial port data to the RH2285. The RH2285/E6000 serial port program has only the sending and receiving functions. An external serial port device can constantly send data. After a serial port is initialized in the BIOS, the serial port captures the ASCII code of the Delete key. Then the system determines that someone presses Delete, and the BIOS setting program is displayed. In this case, when the power on self-test (POST) is complete, the BIOS setup interface is automatically displayed.
Root Cause
When the "Remote Access" for serial port redirection is enabled in the BIOS, the peripheral connected to the DB9 serial port connector sends serial port data to the RH2285.

Solution
Solution 1: Before the RH2285 system starts the operating system (OS), disconnect or shut down the peripheral connected to the DB9 serial port connector to stop sending data to the RH2285. After starting the OS, connect and start the peripheral.

Solution 2: Display the BIOS interface, and set Remote Access to Disable. The function is used only to set serial port redirection in the POST phase without affecting the redirection function in the GRUB phase and in the OS kernel. The following describes the methods of setting Remote Access:

1.  Display the BIOS interface, and select RemoteAccess Configuration on the Advanced tab page, as shown in Figure 3.

Figure 3 Advanced



2.  Select Remote Access, and press Enter. In the displayed check box, select Disable, as shown in Figure 4 and Figure 5.

Figure 4 Remote Access



Figure 5 Disabled Remote Access

Suggestions
Note:
Figure 6 shows the Remote Access Configuration screen.

Figure 6 Remote Access Configuration

END