Created attachment 1037368 [details]
Full data on run with --debugsolver

With dnf-1.0.0-1.fc22.noarch I tried to install an older kernel from files I manually downloaded, because I need to run a kernel module not available for the latest kernel yet:

beland@localhost ~]$ sudo dnf install ./kernel-4.0.2-300.fc22.x86_64.rpm ./kernel-modules-4.0.2-300.fc22.x86_64.rpm ./kernel-core-4.0.2-300.fc22.x86_64.rpm 
Last metadata expiration check performed 2:03:17 ago on Wed Jun 10 10:55:20 2015.
Error: conflicting requests.
conflicting requests

The message "conflicting requests" does not provide enough information for me to solve the problem.  What is conflicting with what?

I currently have the following installed:

kernel-4.0.4-303.fc22.x86_64
kernel-core-4.0.3-300.fc22.x86_64
kernel-core-4.0.4-301.fc22.x86_64
kernel-core-4.0.4-303.fc22.x86_64
kernel-debug-devel-4.0.4-303.fc22.x86_64
kernel-headers-4.0.4-303.fc22.x86_64
kernel-modules-4.0.3-300.fc22.x86_64
kernel-modules-4.0.4-301.fc22.x86_64
kernel-modules-4.0.4-303.fc22.x86_64

When I re-ran with --debugsolver, I got the following in solver.result:

install kernel-4.0.2-300.fc22.x86_64@@commandline
install kernel-core-4.0.2-300.fc22.x86_64@@commandline
install kernel-modules-4.0.2-300.fc22.x86_64@@commandline
problem 3e63cf64 info conflicting requests
problem 3e63cf64 solution 685d72df deljob erase pkg kernel-core-4.0.2-300.fc22.x86_64@@commandline
problem 3e63cf64 solution ef4b0625 deljob install pkg kernel-4.0.2-300.fc22.x86_64@@commandline
problem 3e63cf64 solution ef4b0625 deljob install pkg kernel-core-4.0.2-300.fc22.x86_64@@commandline
problem d9841380 info conflicting requests
problem d9841380 solution 34974340 deljob erase pkg kernel-modules-4.0.2-300.fc22.x86_64@@commandline
problem d9841380 solution b7b737c4 deljob install pkg kernel-4.0.2-300.fc22.x86_64@@commandline
problem d9841380 solution b7b737c4 deljob install pkg kernel-modules-4.0.2-300.fc22.x86_64@@commandline