[Bug 53404] upgrading from 2.6.15-23 to 2.6.15-26 causes slowdown

[geos]

Public bug reported:

Binary package hint: linux-686-smp

I am running Dapper on a ThinkPad X60s. When I upgraded the kernel image
from the Live Install kernel which seems to be 2.6.15-23 to the latest
dapper-security 2.6.15-26 (for some reason the package says 2.6.15-24
but the kernel image file says 26) I experience significant system
slowdown.  There don't appear to be any rogue processes in 'top'

In addition, the slowdown is MUCH MUCH worse for the 2.6.15-26 686 SMP
kernel than the 386 kernel, to the point of making the system basically
unusable (you can't type without significant 'lag').

Going back to the   2.6.15-23 kernel seems to fix the slowdown.

** Affects: linux-meta (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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upgrading from 2.6.15-23 to 2.6.15-26 causes slowdown
https://launchpad.net/bugs/53404