Have 5 Fedora Linux machines at home. 3 with Fedora 34 and 2 with Fedora 35. One of the Fedora 34 machines after kernel upgrade two times ago has stopped auto booting?? Comes up with grub menu and sits there doing nothing? Pressing the Enter key has it boot the highlighted top latest kernel, and it then works fine.
Looked at log files, but didn't see anything. Did a reinstall of the kernel-core no change. Did a reinstall of grub2 files and again no change. Looked at /etc/defaults/grub seems same as other machines.
Saw some lines about hibernation in boot.log, but never have used hibernation.
This machine is generally headless (no monitor). Have a monitor hooked at moment, but anytime I do a reboot on it, have to manually hit the enter key.
Today dnf update included another kernel, but same thing. New kernel shows at top, but no timeout, and only manually pressing enter gets it to boot.
Any ideals? Was planning on upgrading machine to 35, but with boot process acting up don't know.
Thanks.