I have a Scientific Linux 6.1 system, which on a Supermicro server which supports IPMI. It's also running with Upstart, which affects how serial consoles work.
My system has a serious problem which requires that I log in to Single User mode to perform some maintenance. I am standing in front of the KVM attached to the server (the VGA console), and I can see all the BIOS and boot messages. The boot sequence goes through the motions, then tells me there is a corrupt filesystem and that's it. I am never presented with a prompt to log into the box, and the screen doesn't say anything about maintenance mode.
I finally connect to the host using the serial console, and I see the following prompt:
* An error occurred during the file system check. *** Dropping you to a shell; the system will reboot *** when you leave the shell. Give root password for maintenance (or type Control-D to continue):
- Why does this prompt for Single User mode appear on the Serial Console only?
- More importantly, can I get this to appear on both the Serial Console and on the attached Keyboard/Video/Monitor?
My Kernel commandline is this:
kernel /boot/vmlinuz-2.6.32-131.17.1.el6.x86_64 ro root=UUID=blah-blah-blah KEYBOARDTYPE=pc KEYTABLE=us console=tty0 crashkernel=auto console=ttyS2,115200n8r