Reversing a Kernel Upgrade (?)

[Shawn Coomey]

I've not done a kernel update via RPM before, but my guess is that it
would leave the original kernel stuff intact, install the new kernel and
remap to it.

Try this (but be careful by backing up /boot first):
As root:

1. Make sure that /boot/vmlinux and /boot/System.map are symlinks, and
not the actual files. If they are indeed symlinks, remove them.

2. ln -s /boot/vmlinux-2.2.19 /boot/vmlinux
   ln -s /boot/System.map-2.2.19 /boot/System.map

3. Reboot. This should effectively remap your system to use the original
kernel.

4. You MAY have to recompile/install the kernel modules, I'm not sure.

If anyone has corrections or additions, by all means add or fix.


Hope this helps!

Shawn










On Thu, 2002-04-04 at 21:46, Irena & Richard Jenkins wrote:
> Hi there!
> 
> My desktop machine is an iMac running YDL version 2.0.  It has given 
> me excellent service until I foolishly contemplated running the rpm 
> upgrade to install the alternative kernel 2.4.4.  You see I was 
> looking for increased USB support for a printer and a 'superdrive'.
> 
> The rpm upgrade went quite well after I manually setup the xwindow 
> configuration ... but now it's giving me error messages and refusing 
> to run kppp.  I am off the 'net on that machine!  Basically some of 
> my machine's software will have to be upgraded to work with a 2.4 
> kernel..
> 
> 
> My difficulty is in restoring/downgrading to the 2.2.19 kernel.  Is 
> there a way to acheive this without further damage to my system?  I 
> want to remove the 2.4.4 kernel, re-install the 2.2.19 kernel and 
> resume my working with the beast.  I don't want to lose all my emails 
> ... so a complete re-install is not the way forward.
> 
> Thinking about this in the bath the other day I reasoned that if I 
> remove the 2.4.4 kernel using rpm ... everything will come to a 
> complete halt.  Can I then use the install disk to re-insert the 
> wanted kernel??
> 
> Any suggestions?
> 
> Also any suggestions for using the 'superdrive' with 2.2.19?
> 
> 
> TIA
> 
> Richard
> -- 
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> Irena & Richard Jenkins                                      VK1NDV  &  VK1RJ
> Canberra,  AUSTRALIA
> +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
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