I've just built a clean lenny system from scratch using grml-debootstrap. I
found that neither linux-image-2.6.26-grml nor linux-image-2.6.28-grml has
proper alsa sound, as reported in this issue. 

The testing is done in vmware, which makes me believe that the issue is
universal, not just limited to my sound card. Thus, I raised the priority and
hope that we can have a working grml kernel for stable lenny soon. 

BTW, please also update the corresponding aufs-modules-2.6.2x-grml as well.

Thanks