remove libstartup-notification0 libxi6 libgtkhtml3.2-11 kspaceduel libice-dev Building the package cache... Initializing package resolver and worker... E: invalid version string '0.78_02-1' W: error while parsing a version for the package 'perl-modules' Scheduling requested actions... Resolving possible unmet dependencies... W: version string 'M17-1': first upstream character 'M' is not a digit W: version string 'M17-1': first upstream character 'M' is not a digit W: some solutions were dropped, you may want to increase the value of the 'cupt::resolver::max-solution-count' option E: unable to resolve dependencies, because of: xserver-xorg 1:7.1.0-19 depends on 'xbase-clients' -> no solutions xbase-clients 4.3.0.dfsg.1-14sarge7 depends on 'libxi6 | xlibs (>> 4.1.0)' -> removed xbase-clients xlibs 4.3.0.dfsg.1-14sarge7 depends on 'libxi6' -> removed xlibs xorg 1:7.1.0-19 depends on 'xserver-xorg' -> installed xserver-xorg 1:7.1.0-19 x-window-system-core 1:7.1.0-19 depends on 'xorg' -> installed xorg 1:7.1.0-19 x-window-system-core 4.3.0.dfsg.1-14sarge7 depends on 'xbase-clients' -> installed x-window-system-core 1:7.1.0-19 xbase-clients 4.3.0.dfsg.1-14sarge7 depends on 'libxi6 | xlibs (>> 4.1.0)' -> removed xbase-clients xlibs 4.3.0.dfsg.1-14sarge7 depends on 'libxi6' -> removed xlibs E: error performing the command 'remove'