Comment 22 for bug 947664

I can confirm this bug.

The following operations took about 15 minutes.

sudo apt-get install linux-generic linux-headers-generic linux-headers-generic-lts-quantal linux-image-generic linux-image-generic-lts-quantal linux-tools linux-tools-lts-quantal
[...]
Unpacking linux-headers-3.2.0-53 (from .../linux-headers-3.2.0-53_3.2.0-53.81_all.deb) ...
Unpacking linux-headers-3.2.0-53-generic (from .../linux-headers-3.2.0-53-generic_3.2.0-53.81_amd64.deb) ...

Unpacking linux-headers-3.5.0-40 (from .../linux-headers-3.5.0-40_3.5.0-40.62~precise1_all.deb) ...
Unpacking linux-headers-3.5.0-40-generic (from .../linux-headers-3.5.0-40-generic_3.5.0-40.62~precise1_amd64.deb) ...
[...]

Meanwhile:

:~$ sudo ps aux | grep 'dpkg'
root 1243 1.0 1.2 119988 96836 pts/6 Ds+ 11:56 0:04 /usr/bin/dpkg --status-fd 71 --unpack --auto-deconfigure /var/cache/apt/archives/linux-image-3.2.0-53-generic_3.2.0-53.81_amd64.deb /var/cache/apt/archives/linux-image-3.5.0-40-generic_3.5.0-40.62~precise1_amd64.deb /var/cache/apt/archives/linux-generic_3.2.0.53.63_amd64.deb /var/cache/apt/archives/linux-image-generic_3.2.0.53.63_amd64.deb /var/cache/apt/archives/linux-headers-3.2.0-53_3.2.0-53.81_all.deb /var/cache/apt/archives/linux-headers-3.2.0-53-generic_3.2.0-53.81_amd64.deb /var/cache/apt/archives/linux-headers-generic_3.2.0.53.63_amd64.deb /var/cache/apt/archives/linux-headers-3.5.0-40_3.5.0-40.62~precise1_all.deb /var/cache/apt/archives/linux-headers-3.5.0-40-generic_3.5.0-40.62~precise1_amd64.deb /var/cache/apt/archives/linux-headers-generic-lts-quantal_3.5.0.40.46_amd64.deb /var/cache/apt/archives/linux-image-generic-lts-quantal_3.5.0.40.46_amd64.deb /var/cache/apt/archives/linux-tools-3.2.0-53_3.2.0-53.81_amd64.deb /var/cache/apt/archives/linux-tools_3.2.0.53.63_amd64.deb /var/cache/apt/archives/linux-tools-3.5.0-40_3.5.0-40.62~precise1_amd64.deb /var/cache/apt/archives/linux-tools-lts-quantal_3.5.0.40.46_amd64.deb