Hi all,
I have a laptop in UEFI mode running CentOS 8.2. All works fine but when I enable Secure Boot, login via gdm is no longer possible. Console login is ok.
I found some related discussions over on Ubuntu forums, suggesting that this could be related to 3rd-party kernel modules, such as nvidia. This laptop has only Intel builtin graphics, and every single module installed is part of the CentOS distribution.
This is from a file /tmp/xses-.XXXXXX (random 6-char string)
xrdb: Can't open display ''
xmodmap: unable to open display ''
Failed to import environment: Process org.freedesktop.systemd1 exited with status 1
/usr/bin/xmbind: Can't open display
Unable to init server: Could not connect: Connection refused
Something is different in the way Xorg is started. In this situation, the first part of the Xorg log file (under ~/.local) is a dump of X command line options.
use: X [:<display>] [options]
-a # ...
-ac ...
...
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