The system takes a long time to boot and displays a message similar to the following:
BUG soft lockup - CPU#0 stuck for 23s!
The CPU number and other details may vary.
This error seems to be caused by timing issue related to loading the microcode.ko module during boot. Loading the module after the system has booted does not cause any problems. Also, the problem seems more likely to occur if the system is booting from an SSD drive.
The workaround is to prevent the microcode module from loading during boot. Perform the following steps during installation:
When the system has finished installing, do not restart
Press CTRL-ALT-F2 to switch to a text console
Execute the following commands:
# chroot /mnt/sysimage # echo "blacklist microcode" > /etc/modprobe.d/microcode.conf # exit
Press CTRL-ALT-F7 to swtich back to the GUI installer
Reboot the system