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I'm running RHEL 8, and occasionally, I get an issue where the authentication window won't accept my password. I know I am entering it correctly because it is the same password I use to log in to the system. Checked /var/log/secure but didn't see anything useful. Could it be related to pam.d?

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  • By authentication window, do you mean the gdm login screen? access.redhat.com/solutions/5011721 Have you also looked at /var/log/messages? Commented Nov 27, 2022 at 0:03
  • Kinda - but instead of Authentication error it says, Sorry that didn't work, please try again. /var/log/messages reports VNC authentication error. I checked that link but it's referring to a file that does not exist for me under /usr/lib/systemd/user/[email protected]. I'm guessing they changed it since RHEL 8.2. I'm on 8.6. But at least I know now it's related to my VNC configuration. Commented Nov 27, 2022 at 19:18

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There was an issue with RHEL 8.4, 8.5 with the Gnome environment: https://bugzilla.redhat.com/show_bug.cgi?id=1971534 (that went away)

I was still able to SSH remotely to the machine. So I re-installed and enabled the "Workstation" GUI which seem to remove the issue (at least workaround)

$ sudo dnf group list Available Environment Groups: Server Minimal Install Custom Operating System Virtualization Host Installed Environment Groups: Server with GUI Workstation Installed Groups: Container Management Headless Management Available Groups: Legacy UNIX Compatibility Development Tools .NET Core Development Graphical Administration Tools Network Servers RPM Development Tools Scientific Support Security Tools Smart Card Support System Tools $ $ sudo systemctl set-default graphical $ sudo reboot

https://www.tecmint.com/install-gui-on-rhel-8/

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