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Abstract

Important notices to read before installing Linux on IBM Power Systems

Content

The following links contain urgent and timely information that could help you avoid problems during the installation of Linux on IBM systems.

Read these important notices before you begin your install.

This site is reserved for this type of urgent information. So, please bookmark this page for future reference.

 
Read before installing Linux on IBM systems
DateAbstract
11/10/2025

LPAR-based KVM guest might hang after snapshot restoration

11/10/2025

L2 guest hangs after kernel crash during CPU hot-add

11/10/2025

Qemu guest boot fails with continuous soft-lockups for certain custom NUMA topology

11/10/2025

Kdump fails when kernel crashes during memory hot plug

11/10/2025LPAR-based KVM guest might hang after multiple migration operations
11/10/2025KVM Bridge network not working on Power10 LPAR
11/10/2025Disabled device reappears in guest after new device hot plug following EEH errors
11/10/2025EEH injection fails on NVMe drives without host location code
11/10/2025EEH errors when a PCI device is reassigned from host to guest
09/28/2025LPAR-base KVM guest might hang after snapshot restoration
09/28/2025daemon_PMLnx throwing double free or corruption errors and crashing
09/03/2025Possibility of temporary loss of paths on Power Systems that run on Linux using virtual fibre channel
08/08/2025kdump over ssh Fails After MAC Address Change
07/29/2025System soft lockups and hard lockups are observed on maximum configuration systems (64 TB and 256 cores) under heavy multithreaded workload conditions
06/17/2025Multi-threading in makedumpfile might cause corrupt vmcores
06/04/2025DLPAR remove of a network SR-IOV device might cause error messages
06/03/2025Soft lockups and startup timeouts on large systems with over 1 TB of memory
11/12/2024Live partition mobility of large memory logical partitions with Hybrid Network Virtualization devices might fail
10/08/2024DLPAR remove operation fails with QLogic FC adapters
09/04/2024Possibility of I/O errors when enabling virtual pmem with dedicated I/O adapters enabled
06/13/2024Revert of a nonvolatile memory express (NVMe) self-encrypting drive (SED) is incomplete
06/11/2024Malformed RHEL Secure Boot Certificate in FW1050 and FW1050.10
05/30/2024Offline cores are activated as online cores after the simultaneous multithreading (SMT) level is changed
05/16/2024Linux boot failure after logical partition (LPAR) is booted with AIX or with the Diagnostics CD (DiagCD)
05/15/2024DLPAR remove operation fails with Emulex FC adapters
05/07/2024Kdump might fail to capture dump with Emulex FC adapters when the dump is saved to the FC disk
05/07/2024NVME disk cannot be accessed for I/O operations or admin commands when NVM subsystem reset operation is performed
04/26/2024KDump and FADump fail to capture dump to VFC or FC backed multipath raw disk
04/26/2024Possible operating system crash after EEH event is triggered on Mellanox device
04/19/2024Possible dump capture failure to FC-based dump target when the Firmware-assisted dump (FADump) is configured
04/17/2024RHEL 8.6 and RHEL 9.0 installer is not integrated with static key secure boot on Power
01/02/2024Kernel kdump capture operation support on NVMe and FC devices
11/16/2023On secure boot-enabled systems with static keys, the execution of the kexec command with the kexec_file_load(-s) command fails when fadump is enabled.
11/16/2023Kdump over NFS fails when configured over an SR-IOV device
11/15/2023Dump collection failed due to out of memory (OOM) error
10/12/2023Kernel dump corruption with Firmware-Assisted Dump (FADump)
06/27/2023Kernel kdump or firmware assisted dump (fadump) capture operation support on NVMF-FC device
05/09/2023KDump or FADump fails to capture dump to VFC backed multipath raw disk
04/28/2023Linux Network Installation issue on VLAN tagged setup
02/21/2023On systems with Broadcom Emulex Fibre Channel adapters, DLPAR operations may cause CPU soft lockups that might cause the system to crash
01/23/2023The Mellanox drivers are not loaded when Secure Boot is enabled
01/11/2023Shared processor logical partition might fail to start after inactive migration
12/22/2022With Broadcom Emulex Fibre Channel adapters, CPU DLPAR add or remove operations might fail, causing the system to soft lockup
12/13/2022Hardlockup seen on large configuration LPARs
11/29/2022Possibility of I/O errors when enabling virtual pmem with dedicated I/O adapters enabled
10/10/2022Intel i40e Linux Driver reports "Unable to allocate memory" when disable_ddw is enabled
10/07/2022Firmware update on Mellonox adapter fails on SLES 15 SP3 using MLNX OFED 4.9-3 and later releases
09/12/2022Possibility of undetected data corruption or crash on Power systems that run Linux® during I/O DLPAR or live migration with hybrid network virtualization
09/12/2022Platform dumps not saved on PowerVM based systems using BMC when initiating a platform dump to an LPAR
08/16/2022CPU DLPAR add or remove operations may fail with Broadcom Emulex Fibre Channel adapters and cause system crash
07/06/2022LPAR enters into an error state after starting with 240 processors set on a freshly configured system or on a new logical partition.
06/29/2022kDump or FADump fails to capture dump to VFC backed multipath raw disk
06/28/2022Disable NMI watchdog during LPM
06/23/2022kdump kernel crashes during per-hop behavior (PHB) reset
06/15/2022Creation of xfs file system fails with persistent memory (PMEM) and NVMe over fibre channel configuration on the same system
06/06/2022Entering lockdown after startup by using sysfs might result in different behavior than entering lockdown normally at startup
05/13/2022During DLPAR memory move operations soft lockups and RCU locks stall due to CPUs stuck at smp_call_function
05/12/2022Installing signed grub2 for secure boot on Power10
05/05/2022Missing CPU register data after PHYP terminates the LPAR when FADump is configured
02/21/2022
02/17/2022Dynamic or third party compiled Kernel modules do not work when Secure Boot based on static key is enabled
02/17/2022Storage errors seen during I/O with Broadcom Emulex Fibre Channel adapters using nvmf-FC storage
12/23/2021RHEL 8.6 and RHEL 9.0 installer is not integrated with static key secure boot on Power
12/23/2021NX-gZIP feature not supported on POWER9 DD2.1 Bare-metal
12/14/2021DLPAR remove operation fails with Flavafish 32GB Marvell Qlogic FC adapter on Power10 systems
12/02/2021Loss of device connection during partition migration or device failover
12/06/2021Boot failure on large configuration systems with kdump enabled
10/22/2021MTU size change and failover reset cause vNIC interface to go into a reset loop.
08/12/2021Possible instability in the operating system after Live Partition Mobility operation
02/22/2021Undetected data corruption on VSX load operations on CI memory
01/18/2021On POWER9 systems with firmware FW950, removing a PCI adapter from a system that is running might fail
12/17/2020Possibility of failure of the kdump operation when an Emulex FC adapter is installed
11/10/2020The logical partition takes a long time to boot from a PCIe version 4.0 NVMe adapter
11/10/2020Unable to capture the vmcore file on an IBM Power System AC922 with 4 or 6 GPUs and is running a GPU workload
31/05/2020The LPM operation with a heavy workload on a large LPAR might result cause the LPAR to hang
06/03/2020Physical port of the SR-IOV device is configured for devices to use jumbo frames
08/12/2020Loss of device or connection during partition migration or device failover
07/21/2020Red Hat and SUSE subscription activation codes
07/16/2020ibmvnic driver fails to boot during fadump or kdump due to insufficient kernel dump memory
06/10/2020LACP mode of bonding device might disable VNIC ports after LPM
06/03/2020Physical port of the SR-IOV device is configured for devices to use jumbo frames
05/27/2020Supported bonding modes for ibmveth and ibmvnic
05/27/2020Taking down the bonded vNIC interface might cause the backup device to fail
05/20/2020EEH errors on IBM POWER9 systems that are enabled with Virtual Persistent Memory
05/18/2020Systems with large memory or CPU configurations might not start completely
05/15/2020Kernel hangs or crashes during partition migration
05/12/2020Possible partition crash during a spurious device operation
05/07/2020Adding more processors to a running Linux LPAR might cause the partition to fail
05/07/2020Adding memory to a running Linux logical partition might crash the partition
04/27/2020EEH errors on IBM POWER9 systems that are enabled with Virtual Persistent Memory
04/24/2020Live migration of Linux LPARs on POWER9 systems might result in LPAR crashes
07/31/2019Possibility of kdump failure when an Emulex FC adapter is installed
04/12/2019Possibility of data corruption on Power 9 systems with 10Gb and 40Gb Ethernet adapters
01/04/2019Live migration of Linux LPARs on Power 9 systems may result in LPAR crashes
11/20/2018Kdump to a network target using a VNIC adapter can fail to transmit the core dump
09/28/2018Possibility of system crash when DLPAR removing memory after partition migration or Dynamic Platform Optimization
09/28/2018When booting LPARs with large amounts of CPU and memory assigned, the system may time-out and stop in "emergency mode"
08/16/2018PCIe3 2-PORT 25/10 Gb NIC & RoCE SFP28 Adapter (EC2T / EC2U) issue on Power 9 systems
08/16/2018Mellanox mlx5 driver fails to load on Power 9 systems with more than 240 SMT threads
07/11/2017Disk Hot Swap in IBM Power 5107-084 Disk Drawer
09/12/2016Linux support on 8001-12C and 8001-22C
09/12/2016SMT disable may cause hang with NVMe Flash Adapters and devices
05/25/2016The Linux device driver for the PCIe3 1.6TB/3.2TB NVMe Flash Adapters for IBM POWER8 Servers does not currently support handling Enhanced Error Handling (EEH) errors. If an EEH error occurs, the LPAR may experience a kernel panic ("Oops: Kernel access of bad area").
05/25/2016Under heavy I/O load, in certain system configurations, "iommu_alloc failed" messages may be seen in the dmesg log
05/04/2016For POWER8 servers with Firmware level FW830.10 (SV830_068), depending on the user's setup, user might experience boot failure after an upgrade from RHEL7.1 to RHEL 7.2.
06/03/2015When Integrity Measurement Architecture (IMA) and Virtual Trusted Platform Module (VTPM) are both enabled, the system hangs during bootup on SUSE Linux Enterprise Server 12.
06/03/2015When processing a Dynamic Platform Optimization (DPO) event or Virtual Private Home Node (VPHN) update, SUSE Linux Enterprise Server 12 installations on PowerVM LPARs can experience a kernel panic ("Oops: Kernel access of bad area").
06/03/2015Customers running Red Hat Enterprise Linux 7.1 (little endian), or SUSE Linux Enterprise Server 12 on an IBM POWER8 server should be aware that PowerVM LPAR support was not initially available on these Linux offerings when shipped.

Document Location

Worldwide

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Document Information

Modified date:
13 November 2025

UID

ibm10964516

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