Users Guide

Although the message indicates the operating system is in the polling mode, the Linux driver continues to work in
the interrupt mode.
Workaround This is working as designed. This issue will be addressed in a later version of the iDRAC firmware.
Assigning iSCSI LUN target to Intel 10G network controller
stops the operating system booting
Description When attempting to install the operating system on iSCSI Logical Unit Numbers (LUN) with the Intel 10G network
controller (Intel card X520 and Intel Ethernet X520-DA2 Server Adapter), the system stops responding at the
boot screen (after POST).
Workaround Disable the local storage controller from the BIOS menu and then proceed with the iSCSI based installation.
Cause This error occurs because the BIOS 0xE820 code does not return the first 0xE820 entry to match int 12
interface and hence does not comply with ACPI specification.
IPMI commands result in high CPU utilization
Description On Dell EMC PowerEdge systems managed through IPMI, IPMI commands issued to the Baseboard Management
Controller (BMC) could result in the kipmid thread consuming high CPU time.
Workaround The issue is addressed with the driver option – kipmid_max_busy_us to the ipmi_si driver module.
Create a file /etc/modprobe.d/ipmi.conf to set an option with the command options ipmi_si
kipmid_max_busy_us=300 and reload the ipmi_si module.
Soft lockup in the TCP network stack hangs the system
Description
Soft lockup in the TCP network stack hangs the system with channel bonding and makes IPv6 idle.
Workaround Disable IPv6 with bonding.
Cause This issue occurs because of a combination of switch setting and network topology. This issue is caused by a bug
in the TCP network.
IPMI driver times out on SUSE Linux Enterprise Server 11
in the UEFI mode
Description
When SUSE Linux Enterprise Server 11 is in the UEFI Mode, the Intelligent Platform Management Interface (IPMI)
driver times out.
Workaround To work around this issue, do one of the following:
• Enable the IPMI driver to use the Keyboard Controller Style (KCS) interface as follows:
# modprobe ipmi_msghandler
# modprobe ipmi_si type="kcs" ports="0xca8" regspacings="4"
# modprobe ipmi_devintf
• Add the ipmi_si option options ipmi_si type="kcs" ports="0xca8"regspacings="4" into
the /etc/modprobe.conf file.
14 Important Information