After pressing Alt+SysRq+K and letting gdm come up, is /var/log/boot.log present? Did it get written to successfully as part of the current boot (based on file timestamp)?
If so, please attach it; perhaps plymouth managed to log more here than it displayed on the console.
After pressing Alt+SysRq+K and letting gdm come up, is /var/log/boot.log present? Did it get written to successfully as part of the current boot (based on file timestamp)?
If so, please attach it; perhaps plymouth managed to log more here than it displayed on the console.