Apologies if this has been discussed; it seems to affect a lot of my systems so I'm surprised if it hasn't, but I haven't found an effective solution looking through the list.
Various PowerEdge 1950s/2950s without DRAC exhibit this symptom running RHEL 5. There is a multiline warning banner in /etc/issue. Console redirection is enabled, and the following form of kernel line is used in /boot/grub/menu.lst: timeout=5 serial --unit=1 --speed=57600 terminal --timeout=5 serial console title Red Hat Enterprise Linux Server (2.6.18-164.2.1.el5) root (hd0,1) kernel /boot/vmlinuz-2.6.18-164.2.1.el5 ro root=LABEL=/ console=tty0 console=ttyS1,57600 rhgb initrd /boot/initrd-2.6.18-164.2.1.el5.img The following is in /etc/inittab: co:2345:respawn:/sbin/agetty -h ttyS1 57600 vt100-nav (The agetty -h option doesn't seem to matter.) Boot is fine; I have access to the console over IPMI/SOL during boot, all the way to getting an agetty login banner and prompt. But once I disconnect my IPMI/SOL session, after some delay, the BMC enters a kind of feedback loop where the banner text is fed back into agetty. agetty then logs a lot of failed login attempts, and eventually init pauses spawning agetty for 5 minutes because of excessive restarts. This looks like this in /var/log/secure (over and over again): Oct 23 21:03:15 foo login: FAILED LOGIN 1 FROM (null) FOR warning**warning**warning**warning**warning**warning**warning, User not known to the underlying authentication module Oct 23 21:03:17 foo login: pam_unix(login:auth): bad username [] Oct 23 21:03:17 foo login: pam_succeed_if(login:auth): error retrieving information about user Oct 23 21:03:17 foo login: FAILED LOGIN 2 FROM (null) FOR , User not known to the underlying authentication module Oct 23 21:03:18 foo login: pam_unix(login:auth): bad username [] Oct 23 21:03:18 foo login: pam_succeed_if(login:auth): error retrieving information about user Oct 23 21:03:18 foo login: FAILED LOGIN 3 FROM (null) FOR , User not known to the underlying authentication module Oct 23 21:03:20 foo login: pam_unix(login:auth): bad username [] Oct 23 21:03:20 foo login: pam_succeed_if(login:auth): error retrieving information about user Oct 23 21:03:20 foo login: FAILED LOGIN SESSION FROM (null) FOR , User not known to the underlying authentication module And in /var/log/messages: Oct 23 21:03:20 hobo init: Id "co" respawning too fast: disabled for 5 minutes If I reconnect to the SOL console using IPMI, everything's fine (assuming init hasn't disabled agetty at the time I connect). Once I disconnect, the same thing starts again (again after some delay). I haven't found any options to agetty that alter this behavior, and the BIOS "Redirection after boot" option doesn't alter it either. It's a problem because init makes agetty unavailable for 5 minutes at a time, and it also causes lots of noise in /var/log/secure. Does anyone know what I'm missing? I would appreciate any help on this. _______________________________________________ Linux-PowerEdge mailing list Linux-PowerEdge@dell.com https://lists.us.dell.com/mailman/listinfo/linux-poweredge Please read the FAQ at http://lists.us.dell.com/faq