On 30 Jul 2015, at 21:06, Radek Holy <rholy(a)redhat.com> wrote:
----- Original Message -----
> From: bugzilla(a)redhat.com
> Subject: Why akmod fails on F22 for nvidia (and possible other uses)
> I did some investigation as to why akmod will fail to install a
> the nvidia dirver when a new kernel turns up.
> The problem is that dnf-makecache.service runs at the same time
> as akmods.service. DNF locks the RPM data base which prevents
> akmods from installing the RPM's it built.
> Here is a extract from 346.72-2.1-for-4.0.8-300.fc22.x86_64.failed.log
> Running transaction
> RPMDB already locked by 2285
> The application with PID 2285 is: dnf
> Memory : 116 M RSS (677 MB VSZ)
> Started: Sat Jul 18 12:09:56 2015 - 06:20 ago
> State : Sleeping
> 2015/07/18 12:16:16 akmods: Could not install newly built RPMs. You can
> find them and the logfile 2015/07/18 12:16:16 akmods:
> in /var/cache/akmods/nvidia/ Looking in the journal shows dnf-makecache
> running at the time that akmods.service need RPMDB access.
> I ended up working around the issue with:
> systemctl disable dnf-makecache.service
> systemctl disable dnf-makecache.timer
> I'm not sure what the right systemd unit change will be to have a
> reliable start up. How do you prevent dnf-makecache from running
> until after akmods.service has run given that started off a timer?
> At the next kernel release I'll know if this is successful.
Can akmods.service simply wait for the RPM lock to be released? Sorry, if the question is
stupid, I am not familiar with akmod system.
I am assuming that the normal running of a Fedora system it is odd to have updates
happening as part of a boot up. The exception to this rule is akmods that handles
the problem of updating kernel modules after a new kernel is installed.
If this assumption is reasonable, at least for now, then fixing dnf-makecache
to use cron and to be off by default will make the world a happy and reliable place
If my assumptions are wrong and dnf folks manage to keep their dnf-makecache in the
Then akmods would be forced to work with this in the system.
Associate Software Engineer
Software Management Team
Red Hat Czech