Description of problem: Get kernel panic when attempting to install EL9.0 on a machine with an Intel Core 2 Duo CPU. Version-Release number of selected component (if applicable): Kernel in initial 9.0 release How reproducible: Always. Steps to Reproduce: 1. Try to intstall on Core 2 (Duo) machine Actual results: Kernel panic a few seconds after starting boot of install process. Expected results: No kernel panic. Additional info: RH announced that RHEL9 does not support 'old CPUs', and the cutoff point appears to be somewhere between Core 2 (Duo) and Core i5. Core 2 (Duo) is more than adequate to run common workloads efficiently for many more years ('many' as in 1,2,3,many). Aided by inexpensive upgrades such as SSD and RAM. We have researched Core 2 (Duo) and found that it was a significant jump in capability from what preceded it. Evidence indicates there's a lot of Core 2 Duo machines still in use, and many workloads will benefit from the software versions provided by RHEL9 (compared with earlier RHEL versions). Thus RH can potentially avoid significant e-waste by moving the RHEL9 CPU cutoff point such that Core 2 (Duo) is supported.
(In reply to fedora-info from comment #0) > Thus RH can potentially avoid significant e-waste by moving the RHEL9 CPU > cutoff point such that Core 2 (Duo) is supported. Waste was indeed a concern, but an additional concern was the power efficiency of these older systems. Red Hat worked with the industry to define specific ISA support levels and used x86-64-v2 as the baseline for RHEL 9 and CentOS 9. Modern systems can be significantly more power efficient, and old systems can be recycled. Florian Weimer discusses some of details in this blog post in 2021: https://developers.redhat.com/blog/2021/01/05/building-red-hat-enterprise-linux-9-for-the-x86-64-v2-microarchitecture-level The use of x86-64-v2 does deprecate some older x86_64 hardware.