Frequency scaling driver intel_pstate not loading on some Intel Xeon Scalable processors
This document (000020273) is provided subject to the disclaimer at the end of this document.
SUSE Linux Enterprise Server 15 SP2
SUSE Linux Enterprise Server 12 SP5
Model = 106, the intel_pstate frequency scaling driver may not load, showing the message
intel_pstate: CPU model not supported
in the kernel log at boot.
The affected processors were formerly known under the codename "Icelake". This situation may present on successive processor models as well.
kernel-rt (See Workaround below)
To load the intel_pstate frequency scaling driver, it is necessary to leave the HWP/SpeedShift feature enabled in the BIOS configuration.
In case such feature is undesired, it can be disabled using the kernel command line option during boot :
Until such a (future) kernel has installed on a system, it will be necessary to follow the workaround procedure outlined above.
This document will be updated with version information about the maintenance kernels as they get released.
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- Document ID:000020273
- Creation Date: 16-Jun-2021
- Modified Date:16-Jun-2021
- SUSE Linux Enterprise Server
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