[CentOS] 8.2.2004 Latest yum update renders machine unbootable

Sun Aug 2 13:47:54 UTC 2020
david <david at daku.org>

At 06:37 AM 8/2/2020, Johnny Hughes wrote:
>On 8/2/20 8:30 AM, david wrote:
> > At 06:10 AM 8/2/2020, you wrote:
> >> On 8/2/20 8:04 AM, david wrote:
> >> >
> >> >> <snip>
> >> >
> >> >
> >> >
> >> >> > I'll post here again once we have pushed the EL8 and CentOS Stream
> >> >> updates.
> >> >>
> >> >> OK .. I have also now pushed the CentOS Linux 8 update .. you
> >> should see
> >> >> an update to SHIM .. the new versions are:
> >> >>
> >> >> PowerTools/x86_64/os/Packages/shim-unsigned-x64-15-8.el8.x86_64.rpm
> >> >> BaseOS/x86_64/os/Packages/shim-ia32-15-15.el8_2.x86_64.rpm
> >> >> BaseOS/x86_64/os/Packages/shim-x64-15-15.el8_2.x86_64.rpm
> >> >>
> >> >> For CentOS Linux 7 .. the new files are:
> >> >>
> >> >> x86_64/Packages/mokutil-15-8.el7.x86_64.rpm
> >> >> x86_64/Packages/shim-ia32-15-8.el7.x86_64.rpm
> >> >> x86_64/Packages/shim-unsigned-ia32-15-8.el7.x86_64.rpm
> >> >> x86_64/Packages/shim-unsigned-x64-15-8.el7.x86_64.rpm
> >> >> x86_64/Packages/shim-x64-15-8.el7.x86_64.rpm
> >> >>
> >> >> You need only replace the files you currently have installed, not
> >> >> install every file.
> >> >>
> >> >> Please report both positive and negative results.
> >> >>
> >> >> Thanks,
> >> >> Johnny Hughes
> >> >>
> >> > I updated my Centos 7, and it's awaiting a reboot.  The version of
> >> shim
> >> > says 15-7, which I presume is the bad one.
> >> >
> >> > What do I need to do?  Obviously, a reboot will encounter the
> >> failure.Â
> >> > Or, should I perform "yum update" periodically and wait for shim
> >> 15-8 to
> >> > appear, and only after that do the reboot?  Or is there some other
> >> remedy?
> >> >
> >> > And by the way, I'm amazed at the speed with which this problem was
> >> > addressed and a fix provided.  You guys work wonders.
> >> >
> >> > David
> >>
> >> It would be best IF the kernel and shim get installed at the same time
> >> if possible .. so I would install the kernel again (since it is not
> >> running yet) with the new shim.
> >>
> >> BTW .. it does not fail on every install .. so it might work w/o the new
> >> update.  However, no need to chance it at this point.  Wait until the
> >> new shim is there and install it and reinstall the kernel is my advise.
> >
> > Here's what I get...
> >
> > rpm -qa | grep shim
> > shim-x64-15-7.el7_9.x86_64
> >
> > yum update
> > Loaded plugins: fastestmirror, langpacks, priorities
> > Loading mirror speeds from cached hostfile
> > Â * base: mirror.fileplanet.com
> > Â * epel: mirror.prgmr.com
> > Â * extras: mirror.shastacoe.net
> > Â * remi-php73: mirror.sjc02.svwh.net
> > Â * remi-safe: mirror.sjc02.svwh.net
> > Â * updates: centos-distro.1gservers.com
> > 373 packages excluded due to repository priority protections
> > No packages marked for update
> >
> >
> >
> > Should I just wait for 15-8 to appear?
> >
> > David
> >
>
>Yes .. it should be on mirror.centos.org now .. you could change the
>repo where your updates come from.  OR .. wait for that mirror to get
>updated.


I just did
yum clean all
yum update

and 15-8 showed up.  Maybe the 'clean all' did it, or maybe just showed up.

I applied the update (yum update), rebooted and...
no boot.  Just a blank screen.

Hardware is a Mac-Mini :-(

This is not an essential machine, so I could 
re-install (from netinstall) if you think it's worth the effort.

Or what?

David