compiling new kernel

I don't know if here is the rigth place do ask this question:

I've a Pavillon tx1420us with Debian Lenny and trying to upgrade to a new
kernel.
hp:/usr/src# uname -a
Linux hp 2.6.26-1-amd64 #1 SMP Sat Nov 8 18:25:23 UTC 2008 x86_64 GNU/Linux


I'had no problem till installing de *.deb package (sorry lhe language is
Portugues...):

hp:/usr/src# dpkg -i linux-image-2.6.27_custom.1.0_amd64.deb
Selecionando pacote previamente não selecionado linux-image-2.6.27.
(Lendo banco de dados ... 102681 arquivos e diretórios atualmente
instalados).
Desempacotando linux-image-2.6.27 (de
linux-image-2.6.27_custom.1.0_amd64.deb) ...
Done.
Configurando linux-image-2.6.27 (custom.1.0) ...
Running depmod.
Running postinst hook script update-grub.
Searching for GRUB installation directory ... found: /boot/grub
User postinst hook script [update-grub] exited with value 1
dpkg: erro processando linux-image-2.6.27 (--install):
sub-processo post-installation script retornou estado de saída de erro 1
Erros foram encontrados durante o processamento de:
linux-image-2.6.27
hp:/usr/src#

thanks for any help
Samuel MacDowell



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