remove libxrender1 libgnomecups1.0-1 gnome-system-tools xlibmesa-dri kpercentage 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: pm-dev 4.3.0.dfsg.1-14sarge7 depends on 'xfree86-common' -> no solutions x11-common 1:7.1.0-19 conflicts with 'xfree86-common' -> removed xfree86-common xutils-dev 1:7.1.ds-6 pre-depends on 'x11-common (>= 1:7.0.0)' -> installed x11-common 1:7.1.0-19 xutils 1:7.1.ds.3-1 depends on 'xutils-dev' -> installed xutils-dev 1:7.1.ds-6 xorg 1:7.1.0-19 depends on 'xutils (>= 1:1.0.1-1)' -> installed xutils 1:7.1.ds.3-1 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 'xlibmesa-dri' -> installed x-window-system-core 1:7.1.0-19 xlibs-dev 4.3.0.dfsg.1-14sarge7 depends on 'pm-dev' -> installed pm-dev 4.3.0.dfsg.1-14sarge7 tk8.4-dev 8.4.9-1sarge2 depends on 'libxt-dev | xlibs-dev' -> installed xlibs-dev 4.3.0.dfsg.1-14sarge7 libxt-dev 4.3.0.dfsg.1-14sarge7 depends on 'libxt6 (= 4.3.0.dfsg.1-14sarge7)' -> removed libxt-dev libxt6 4.3.0.dfsg.1-14sarge7 depends on 'xfree86-common' -> installed libxt6 1:1.0.2-2 x11-common 1:7.1.0-19 conflicts with 'xfree86-common' -> removed xfree86-common xutils-dev 1:7.1.ds-6 pre-depends on 'x11-common (>= 1:7.0.0)' -> installed x11-common 1:7.1.0-19 xutils 1:7.1.ds.3-1 depends on 'xutils-dev' -> installed xutils-dev 1:7.1.ds-6 xorg 1:7.1.0-19 depends on 'xutils (>= 1:1.0.1-1)' -> installed xutils 1:7.1.ds.3-1 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 'xlibmesa-dri' -> installed x-window-system-core 1:7.1.0-19 libxt-dev 1:1.0.2-2 depends on 'libxt6 (= 1:1.0.2-2)' -> no solutions libxt6 4.3.0.dfsg.1-14sarge7 depends on 'xfree86-common' -> removed libxt6 x11-common 1:7.1.0-19 conflicts with 'xfree86-common' -> removed xfree86-common xutils-dev 1:7.1.ds-6 pre-depends on 'x11-common (>= 1:7.0.0)' -> installed x11-common 1:7.1.0-19 xutils 1:7.1.ds.3-1 depends on 'xutils-dev' -> installed xutils-dev 1:7.1.ds-6 xorg 1:7.1.0-19 depends on 'xutils (>= 1:1.0.1-1)' -> installed xutils 1:7.1.ds.3-1 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 'xlibmesa-dri' -> installed x-window-system-core 1:7.1.0-19 libxt-dev 4.3.0.dfsg.1-14sarge7 depends on 'libxt6 (= 4.3.0.dfsg.1-14sarge7)' -> installed libxt-dev 1:1.0.2-2 libxt6 4.3.0.dfsg.1-14sarge7 depends on 'xfree86-common' -> removed libxt6 x11-common 1:7.1.0-19 conflicts with 'xfree86-common' -> removed xfree86-common xutils-dev 1:7.1.ds-6 pre-depends on 'x11-common (>= 1:7.0.0)' -> installed x11-common 1:7.1.0-19 xutils 1:7.1.ds.3-1 depends on 'xutils-dev' -> installed xutils-dev 1:7.1.ds-6 xorg 1:7.1.0-19 depends on 'xutils (>= 1:1.0.1-1)' -> installed xutils 1:7.1.ds.3-1 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 'xlibmesa-dri' -> installed x-window-system-core 1:7.1.0-19 E: error performing the command 'remove'