сравните 2.6.18 для M40:

"""
 This package contains the Linux kernel that is used to boot and run
 your system.
 
 Most hardware drivers for this kernel are built as modules.  Some of
 these drivers are built separately from the kernel; they are available
 in separate packages (kernel-modules-*-std-pae).
 
 The "std" variant of kernel packages is a generic 2.6.x kernel which
 should support wide range of hardware, but does not contain patches
 which are useful only for some special applications (and may have
 undesirable side effects in other cases).  This is the default 2.6.x
 kernel variant for ALT Linux distributions.
 
 The "std-pae" variant supports SMP systems, but should also work on
 uniprocessor systems without noticeable overhead (the SMP alternatives
 code automatically removes most of the SMP overhead if an uniprocessor
 system is detected).
 
 This kernel is configured for i686 (Intel Pentium Pro or higher)
 processors and supports up to 64 GB physical RAM using PAE mode.
 WARNING: This kernel will not boot on processors without PAE support
 (this includes old Pentium-class processors and first variants of
 Intel Pentium M); use the "std-smp" kernel variant on such systems.
 
 You may also want to use the "std-smp" kernel even if your processor
 supports PAE, but you have 4 GB or less physical RAM - in this case
 using PAE is not required, but PAE introduces some overhead in memory
 management and is incompatible with the Software Suspend support.
"""

и 2.6.25 для M41:
"""
 This package contains the Linux kernel that is used to boot and run
 your system.
 
 Most hardware drivers for this kernel are built as modules.  Some of
 these drivers are built separately from the kernel; they are available
 in separate packages (kernel-modules-*-std-pae).
 
 The "std" variant of kernel packages is a generic 2.6.x kernel which
 should support wide range of hardware, but does not contain patches
 which are useful only for some special applications (and may have
 undesirable side effects in other cases).  This is the default 2.6.x
 kernel variant for ALT Linux distributions.
 
 This kernel build for PAE systems. If you have more then 2Gb of memory use
 this kernel.
"""