Release Notes

Known issues

Topics:

• ACPI kernel fails to assign BAR register to PCI device

• ACPI error messages related to IPMI are displayed in dmesg log

• Unable to create or modify namespace for NVDIMM

• Unable to shut down Ubuntu when the graceful shutdown option from iDRAC is selected or when power button is pressed

on the server

• Ubuntu fails to reboot when onboard DVD drives are connected to servers with AMD processor

• Unable to install Ubuntu 18.04 in software RAID (S140) disks

• Ubuntu 18.04.1 installation and boot crashes when HBA330 card is available in servers with AMD processor

ACPI kernel fails to assign BAR register to PCI device

Description The following BAR register failure message is displayed in dmesg log during system startup:

[0.496178] pci 0000:01:00.0: BAR 6: no space for [mem size 0x00100000

pref]

[0.496179] pci 0000:01:00.0: BAR 6: failed to assign [mem size

0x00100000 pref]

The Linux PCIe layer tries to allocate all PCIe BARs in every boot. Home agent devices on Intel Xeon

processors and AMD Rome processors are not expected to have BAR registers. The home agent devices,

however, returns a positive value when queried by the kernel. This issue can be ignored because there is

no functionality loss.

Workaround Not available.

Systems affected All yx4x and yx5x Dell EMC PowerEdge servers.

Applies to Ubuntu 18.04

Tracking number 139252

ACPI error messages related to IPMI are displayed in

dmesg log

Description

The following ACPI-IPMI error message is displayed in the dmesg log during system startup:

[ 24.507939] ACPI Error: No handler for Region [SYSI]

(0000000098633579) [IPMI] (20180531/evregion-132)

[ 24.516148] ACPI Error: Region IPMI (ID=7) has no handler (20180531/

exfldio-265)

The DSDT feature of IPMI Operation Region is enabled in the BIOS as per ACPI 4.0 specifications.

Platforms that require IPMI Operation Region that is enabled in the BIOS for power meter usage display

the ACPI error messages since the kernel does not have handlers to support the methods in the IPMI

Operation Region. This issue can be ignored because there is no functionality loss.

Workaround Not available.

Systems affected All yx4x and yx5x PowerEdge servers.

Applies to Ubuntu 18.04

8 Known issues