from the logs:
Unpacking x11-common (from .../x11-common_7.5+5ubuntu1_all.deb) ... debconf: DbDriver "config": /var/cache/debconf/config.dat is locked by another process: Resource temporarily unavailable dpkg: error processing /cdrom//pool/main/x/xorg/x11-common_7.5+5ubuntu1_all.deb (--unpack): subprocess new pre-installation script returned error exit status 1
from the logs:
Unpacking x11-common (from .../x11- common_ 7.5+5ubuntu1_ all.deb) ... debconf/ config. dat is locked by another process: Resource temporarily unavailable /pool/main/ x/xorg/ x11-common_ 7.5+5ubuntu1_ all.deb (--unpack):
debconf: DbDriver "config": /var/cache/
dpkg: error processing /cdrom/
subprocess new pre-installation script returned error exit status 1