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тАО01-05-2009 07:01 PM
тАО01-05-2009 07:01 PM
downgrading of kernel
i am facing a problem here.
recently i installed RedHat Enterprise 4.6 64bit OS with kernel version 2.6.9-67. I wanted to upgrade the kernel to the latest version in order to install some qlogic drivers.
However i upgraded the kernel using the wrong procedure by doing "rpm -U". Now i am noticing some things that are not right such as only 1 processor showing in /proc/cpuinfo while there are supposed to be 2 x quadcore.
My question is what is the proper procedure to downgrade back to my old kernel 2.6.9-67? Thanks for the help.
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тАО01-05-2009 10:05 PM
тАО01-05-2009 10:05 PM
Re: downgrading of kernel
upgrading kernel sometimes caused severe hassle to your existing environment or applications.
So, my suggestions is just install the kernel and point it from your grub.conf file.
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тАО01-05-2009 10:09 PM
тАО01-05-2009 10:09 PM
Re: downgrading of kernel
the point is not a reward, just to respect the person who answered u and make your problem resolved. and also sometimes it will help others to find the solution.
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тАО01-05-2009 11:01 PM
тАО01-05-2009 11:01 PM
Re: downgrading of kernel
i managed to install the older kernel and used /etc/grub.conf to point and boot from it. It boots ok but during the boot process gave some warning about unable to load modules and using compatible ones.
I booted to the older kernel version but still not able to see the processors that should be showing in /proc/cpuinfo.
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тАО01-06-2009 01:50 AM
тАО01-06-2009 01:50 AM
Re: downgrading of kernel
Did you install a SMP kernel?
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тАО01-06-2009 02:29 AM
тАО01-06-2009 02:29 AM
Re: downgrading of kernel
Yes i installed a SMP kernel. Somehow somewhere during the upgrade/downgrade of the kernel some procedures were missed.
I followed the following guide and upgraded my kernel to the latest version. everything is fine now :)
http://www.redhat.com/support/resources/howto/kernel-upgrade/index.html
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тАО01-06-2009 11:35 PM
тАО01-06-2009 11:35 PM
Re: downgrading of kernel
http://forums13.itrc.hp.com/service/forums/helptips.do?#33