Chapter 10. Removed features

In Red Hat Enterprise Linux (RHEL) 9.9, OpenMPI support for the fftw package on the 32-bit i686 architecture is removed and is no longer supported. As an alternative, you can use the 64-bit version of OpenMPI for fftw.

Updating to this version might fail on x86 architectures due to missing 32-bit libraries. If you use a multilib setup, you must manually resolve these library dependencies before updating.

Jira:RHEL-172170

The Wired Equivalent Privacy (WEP) wireless network security standard is no longer supported. Because WEP is insecure and outdated, you must use more secure options, such as WPA2 or WPA3, to ensure secure wireless connections.

Before upgrading to RHEL 9, remove any WEP-configured networks from Settings.

The wpa_supplicant package also no longer supports WEP.

Jira:RHEL-166751