From Bugzilla Helper:
User-Agent: Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)
Description of problem:
When init starts, it does not properly initialize the tty for serial
consoles. The URL explains the situation and a patch to remedy the
Steps to Reproduce:
1. Configure system to support serial console.
3. Try to press 'I' to do an interactive startup.
4. Find that 'I' does not work through serial console.
Actual Results: Nothing.
Expected Results: Interactive startup should be envoked.
Additional info: That's as simple as it gets.
*** Bug 42280 has been marked as a duplicate of this bug. ***
Fixed in SysVinit-2.78-17; thanks!