Kubuntu and Ubuntu 24.04.1 get stuck after grub

[Jim]

I have a Dell Optiplex 7010 with 32GB RAM.  Recently I installed Kubuntu 
24.04.1 on  a Kingston 240GB SSD. Sometimes it gets stuck after the grub 
menu.  I have a second drive in it with Windows 10 that I occasionally 
use for games.  After I choose Kubuntu at the grub menu, the menu 
disappears then nothing happens.  I won't get the login screen .  I have 
to hold down the power button until it shuts off.   Then I switch it on 
and try again.  Sometimes it boots normally.  Sometimes it gets stuck.  
I removed the SSD that has Windows on it and the problem still happens.  
A few days ago I reinstalled the SSD that had my previous Kubuntu 22.04 
installation  on it.

Does anyone have any idea what might be causing this and what I can do 
about it?  The computer boots in legacy mode.  Could this be some bug 
that doesn't show itself if I booted using UEFI?


Thanks

Jim