Morning list! I have a situation that was brought about by a system crash during a yum update. The motherboard suffered a catastrophic failure due to busted CAPS. Lucky for me (or so I thought at the time), I had a spare, identical motherboard as the one that failed. I replaced the dud board and rebooted. This machine runs headless and is my primary (personal/home) mail server. I normally access the booting console via hyper terminal when I need to change boot parameters or just watch the system boot up! Getting to the point, nothing comes up at all on the terminal screen. So I hooked up a monitor and keyboard (even a mouse) to check what was going on. What I noticed immediately was that the kernel screen selection screen did not appear! Instead, I just got a message at the bottom on the screen stating "Grub Loading Stage 2" or something to that effect. Straight from there, was the usual scrolling text up to the point where SELinux starts. Then nothing displays at all until the final login screen. Not even the "Nash" screen that prompts one to enter "I" for interactive start-up appeared! Could someone enlighten me on what I could check? I have reinstalling all packages that were installed just before and after the system crash to no avail. This is a system that was running CentOS 5.3 final and I was updating several packages including upgrading the kernel from 2.6.18-128.1.6.el5 to 2.6.18-128.1.10.el5. Cheers, tkb.
Anthony Kamau wrote:> Morning list! > > I have a situation that was brought about by a system crash during a yum > update. The motherboard suffered a catastrophic failure due to busted > CAPS. Lucky for me (or so I thought at the time), I had a spare, > identical motherboard as the one that failed. I replaced the dud board > and rebooted. This machine runs headless and is my primary > (personal/home) mail server. I normally access the booting console via > hyper terminal when I need to change boot parameters or just watch the > system boot up! > > Getting to the point, nothing comes up at all on the terminal screen. > So I hooked up a monitor and keyboard (even a mouse) to check what was > going on. What I noticed immediately was that the kernel screen > selection screen did not appear! Instead, I just got a message at the > bottom on the screen stating "Grub Loading Stage 2" or something to that > effect. Straight from there, was the usual scrolling text up to the > point where SELinux starts. Then nothing displays at all until the > final login screen. Not even the "Nash" screen that prompts one to > enter "I" for interactive start-up appeared!Sounds like you have a serial console configured. Look in your grub.conf for the serial settings, disable them if your not using a serial console and want to see those messages. I believe you can also add another option to the kernel to show the messages in both locations though I don't recall the syntax off hand, it's been a long time since I did that. console=tty0 or something similar. nate
Here's some additional info to the problem:
I created a VM to watch it boot up so I could see what was happening
where. Well, the first step where the scrolling text stops is as shown
below:
SELinux: Disabled at runtime.
Type=1404 audit(1242405997.079:2): selinux=0 auid=4294967295
ses=4294967295
On my main server, nothing else appears here until I get the login
prompt.
On the VM I see right after the SELinux stuff above the following:
INIT: version 2.86 booting
Welcome.....
So what would cause messages spewed by INIT not show up and also the
lack of the kernel selection screen and also kill output to the serial
console?
Tia,
tkb.