nvidia304 hangs with fc23 kernel

[John Pilkington]

Yesterday I ran dnf system upgrade from fc22 to fc23.  It all seemed 
very smooth (4185 packages) until it rebooted to emergency mode.  After 
repairs by fsck it runs happily under 4.4.13-200.fc22 but just hangs 
with a black screen and a flashing cursor with 4.5.7-200.fc23

yumex-dnf seems inconsistent in reporting the state of the fc23 kernel, 
akmod-nvidia-304xx and kmod.  Now it is showing them as uninstalled, 
with 'Error(s) in search for dependencies' if I try to install the 
current 4.5.7-200.fc23

An attempt to install 4.2.3-300.fc23 is apparently seen as a downgrade 
of 4.4.12-200.fc22 (not the running kernel) and is then rejected as 
conflicting.

I suppose I can continue as is until the next kernel appears - but a fix 
would be better :-)

I was able to rpmbuild --rebuild the rpmfusion mythtv-0.28-3.fc24 srpm, 
and have it running now.  Strangely, an attempt to update my earlier 
fc22 build of mythtv master failed with qt5 problems.

John P