почему в конфигурации dpkg не хватает места в Ubuntu 10.04, когда есть свободное место?

У меня есть 7Gb, но ...

~ # dpkg --configure -a
Setting up linux-image-2.6.32-31-generic-pae (2.6.32-31.61) ...
Running depmod.
update-initramfs: Generating /boot/initrd.img-2.6.32-31-generic-pae

gzip: stdout: No space left on device
update-initramfs: failed for /boot/initrd.img-2.6.32-31-generic-pae
Failed to create initrd image.
dpkg: error processing linux-image-2.6.32-31-generic-pae (--configure):
 subprocess installed post-installation script returned error exit status 2
dpkg: dependency problems prevent configuration of linux-image-generic-pae:
 linux-image-generic-pae depends on linux-image-2.6.32-31-generic-pae; however:
  Package linux-image-2.6.32-31-generic-pae is not configured yet.
dpkg: error processing linux-image-generic-pae (--configure):
 dependency problems - leaving unconfigured
dpkg: dependency problems prevent configuration of linux-generic-pae:
 linux-generic-pae depends on linux-image-generic-pae (= 2.6.32.31.37); however:
  Package linux-image-generic-pae is not configured yet.
dpkg: error processing linux-generic-pae (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 linux-image-2.6.32-31-generic-pae
 linux-image-generic-pae
 linux-generic-pae
~ # df
Filesystem           1K-blocks Used Available Use% Mounted on
/dev/sda3             18577148  10255512   7377972  59% /
none                   1026416       164   1026252   1% /dev
none                   1030624         0   1030624   0% /dev/shm
none                   1030624       100   1030524   1% /var/run
none                   1030624         4   1030620   1% /var/lock
none                   1030624         0   1030624   0% /lib/init/rw
/dev/sda1                93207     87960       435 100% /boot
~ # lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 10.04.2 LTS
Release:    10.04
Codename:   lucid

Есть идеи, почему это не удается?