I installed kernel* from updates-testing. Now I want to go back to distro-sync. Let's try it: sudo dnf distro-sync kernel* Error: problem with installed package kernel-3.17.7-300.local.fc21.x86_64. problem with installed package kernel-core-3.17.7-300.local.fc21.x86_64. problem with installed package kernel-doc-3.17.4-200.fc20.noarch. problem with installed package kernel-modules-3.17.7-300.local.fc21.x86_64. problem with installed package kernel-modules-extra-3.17.7-300.local.fc21.x86_64 that didn't work, and not very informative. How about? [nbecker@nbecker1 ~]$ sudo dnf downgrade kernel* Error: conflicting requests Another loser. OK, yum? sudo yum distro-sync kernel* Dependencies Resolved ================================================================================ Package Arch Version Repository Size ================================================================================ Installing: kernel-devel x86_64 3.17.8-300.fc21 updates 9.1 M Removing: kernel x86_64 3.18.3-201.fc21 installed 0.0 kernel-core x86_64 3.18.3-201.fc21 installed 41 M kernel-devel x86_64 3.18.3-201.fc21 installed 34 M kernel-modules x86_64 3.18.3-201.fc21 installed 17 M kernel-modules-extra x86_64 3.18.3-201.fc21 installed 2.1 M Downgrading: kernel-headers x86_64 3.17.8-300.fc21 updates 947 k kernel-tools x86_64 3.17.8-300.fc21 updates 126 k kernel-tools-libs x86_64 3.17.8-300.fc21 updates 50 k kernel-tools-libs-devel x86_64 3.17.8-300.fc21 updates 47 k Removing for dependencies: kmod-VirtualBox-3.18.3-201.fc21.x86_64 x86_64 4.3.20-2.fc21 @/kmod- VirtualBox-3.18.3-201.fc21.x86_64-4.3.20-2.fc21.x86_64 1.0 M kmod-nvidia-304xx-3.18.3-201.fc21.x86_64 x86_64 304.125-1.fc21.1 @/kmod- nvidia-304xx-3.18.3-201.fc21.x86_64-304.125-1.fc21.1.x86_64 15 M Total 1.7 MB/s | 10 MB 00:06 OK, that sounds about right. Let's try it: Running transaction check Running transaction test Transaction check error: package kernel-tools-libs-3.18.3-201.fc21.x86_64 (which is newer than kernel- tools-libs-3.17.8-300.fc21.x86_64) is already installed package kernel-tools-3.18.3-201.fc21.x86_64 (which is newer than kernel- tools-3.17.8-300.fc21.x86_64) is already installed package kernel-tools-libs-devel-3.18.3-201.fc21.x86_64 (which is newer than kernel-tools-libs-devel-3.17.8-300.fc21.x86_64) is already installed package kernel-headers-3.18.3-201.fc21.x86_64 (which is newer than kernel- headers-3.17.8-300.fc21.x86_64) is already installed package kernel-devel-3.18.3-201.fc21.x86_64 (which is newer than kernel- devel-3.17.8-300.fc21.x86_64) is already installed Error Summary ------------- OK, so maybe yum doesn't work either. -- -- Those who don't understand recursion are doomed to repeat it -- devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxxx https://admin.fedoraproject.org/mailman/listinfo/devel Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct