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E: Sub-process /usr/bin/dpkg returned an error code (1)

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linux-howto

http://www.linuxquestions.org – Hello, I'm new to Linux. Anyway, I'm trying to customize my BackTrack4 image so I can use the live disk with my ati graphic card. While trying to put the drivers with the apt-get install ati-driver command, I get the following message: Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: ati-driver 0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded. Need to get 0B/17.8MB of archives. After this operation, 86.0MB of additional disk space will be used. (Reading database ... 233992 files and directories currently installed.) Unpacking ati-driver (from .../ati-driver_9.5-bt2_i386.deb) ... Replacing files in old package libgl1-mesa-glx ... Replacing files in old package xserver-xorg-core ... dpkg: error processing /var/cache/apt/archives/ati-driver_9.5-bt2_i386.deb (--unpack): trying to overwrite `/usr/lib/libGL.so', which is also in package libgl1-mesa-dev Processing triggers for man-db ... Errors were encountered while processing: /var/cache/apt/archives/ati-driver_9.5-bt2_i386.deb E: Sub-process /usr/bin/dpkg returned an error code (1) I tried everything that I could find searching the net, but I couldn't solve the problem. Does anyone have an idea how to solve the problem? Thanks. (HowTos)