# dpkg -i /var/cache/apt/archives/pve-firmware_1.0-14_all.deb (Reading database ... 39867 files and directories currently installed.) Unpacking pve-firmware (from .../pve-firmware_1.0-14_all.deb) ... dpkg: error processing /var/cache/apt/archives/pve-firmware_1.0-14_all.deb (--install): trying to overwrite '/lib/firmware/RTL8192SU/rtl8192sfw.bin', which is also in package firmware-realtek 0.28+squeeze1 dpkg-deb: subprocess paste killed by signal (Broken pipe) Errors were encountered while processing: /var/cache/apt/archives/pve-firmware_1.0-14_all.deb
The installation of Debian 6 (amd64) is clean. How to investigate the problem deeper?
Solved by removing package firmware-realtek.