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The RH2488 V2 with the Kylin 3.0 Installed Breaks Down

Publication Date:  2015-06-19 Views:  100 Downloads:  0
Issue Description
Hardware configuration:
RH2488 V2

Software configuration:
Kylin 3.0

Symptom:

Faults frequently occur in an RH2488 V2 during startup. For example, a blank screen is displayed, the keyboard does not respond, and the service network port cannot be accessed. Similar faults sometimes occur on other servers when the servers are running.
Handling Process
1.  Log in to the operating system (OS) of the server and query the system version, as shown in Figure 1.

Figure 1 Querying the system version



2.  Exclude application factors because the fault still occurs when the system is in the idle state. Install the RHEL5.7 and RHEL5.8 on two servers respectively onsite and test the servers for one day. Servers with the RHEL5.7 and RHEL5.8 installed are running properly, while servers with the Kylin 3.0 installed are malfunctioning. Determine that the fault is caused by the OS.

3.  Modify basic input/output system (BIOS) settings (P/C/T option) for servers with the Kylin 3.0 installed. No exception is found. This indicates that BIOS settings (P/C/T option) are related to the fault.

4.  Use the RHEL5.7 kernel to replace the Kylin 3.0 kernel. The fault does not occur. This indicates that the fault is caused by the Kylin 3.0 kernel. After the Kylin 3.0 kernel is upgraded, the fault is rectified.
Root Cause
The Kylin 3.0 kernel is of an early version and does not fully support Intel CPUs of the RH2488 V2. As a result, a fault occurs. The server hardware is normal.

Solution
Method 1:

1.  Restart the RH2488 V2 and press Delete during the power on self-test (POST) to enter the BIOS.

2.  On the Advanced tab, choose Processor and Clock options.

3.  Set Intel(R) SpeedStep(tm) tech to Disable.

4.  Set Intel(R) C-STATE tech to Disable.

5.  Set ACPI T State to Disable.

Figure 2 shows the new settings.

Figure 2 New settings



6.  Save the settings and exit the BIOS.

Method 1 is a workaround for hardware.

Method 2:

Seek help from Kylin and upgrade the Kylin 3.0 kernel to support Westmere EX systems. Method 2 is the solution to this issue.
Suggestions
Check OS compatibility first for similar cases.

END