When an application such as systool reads /sys/class/scsi_host/host (generated by the Emulex<scsi host number>/mboxlpfc driver), the benign "Bad State" message is no longer printed in the console or logged into the system log file.
The kernel now asserts Data Terminal Ready (DTR) signals before printing to serial ports during boot time. DTR assertion is required by some devices. Kernel boot messages are now printed to serial consoles on such devices.
In Red Hat Enterprise Linux 4.6, the login prompt may not appear when the operating system was installed through a serial console. This issue is now fixed in this release.