I've just upgrade the BIOS to latest, with still no luck. But now i've noted that i have added to boot options 'lapic': probably some times ago, i never minded it; removing it made boot work again.
Now it is up to you because it worked with 'lapic' before -26 kernel version... -- My IBM Thinkpad T23 hang on boot https://launchpad.net/bugs/56373 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
