On Thu, 04 Jan 2018 21:09:05 +0100
Martin Wagner <martin.wag...@mailbit.io> wrote:

> On Thu, 2018-01-04 at 13:06 +0100, Wolfgang Pfeiffer wrote:
> > Ah, I see: I missed that in your first message - sorry. But if dnf
> > upgrades work, your concerns about not being not be able to upgrade
> > to
> > the next major version of Fedora might be not necessary: there's some
> > upgrade version for dnf that worked for me upgrading from F24 -> F25  
> > ->F26. I've used this Fedora HowTo:  
> > 
> > https://fedoraproject.org/wiki/DNF_system_upgrade  
> 
> I borrowed a good camera from a friend and managed to actually capture
> the messages that the system writes when I try to do a Gnome Software
> restart & update routine. Right after it writes 'Installing updates;
> this could take a while...' it writes 
> 
> Command failed
> Kernel not configured for semaphores (System V IPC). Not using udev
> synchronization code.
> Device-mapper: remove ioctl on fedora-root failed: Device or resourcebusy 

Closed bug
https://bugzilla.redhat.com/show_bug.cgi?id=1359352
as  it is said to be a duplicate of
https://bugzilla.redhat.com/show_bug.cgi?id=1385432

On this latter page is a hint that the issue might be an LVM one,
i.e. LVM created during automatic partitioning at install time. Not
clear ...

Comment 143
"I then reinstalled without LVM using custom partioning, updated and
 now the problem is gone"
https://bugzilla.redhat.com/show_bug.cgi?id=1385432#c143

Seems to be serious, and an old bug, and unfixed.

Good luck!
Wolfgang
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