The following packages will be REMOVED:
  xorg-driver-fglrx
0 upgraded, 0 newly installed, 1 to remove and 52 not upgraded.
1 not fully installed or removed.
Need to get 0B of archives.
After unpacking 32.1MB disk space will be freed.
Do you want to continue [Y/n]? y
(Reading database ... 111756 files and directories currently installed.)
Removing xorg-driver-fglrx ...
dpkg-divert: rename involves overwriting `/usr/lib/libGL.so.1' with
  different file `/usr/lib/fglrx/libGL.so.1.xlibmesa', not allowed
dpkg: error processing xorg-driver-fglrx (--remove):
 subprocess post-removal script returned error exit status 2
Errors were encountered while processing:
 xorg-driver-fglrx
E: Sub-process /usr/bin/dpkg returned an error code (1)