[CentOS] 8.2.2004 Latest yum update renders machine unbootable

Sun Aug 2 13:10:30 UTC 2020
Johnny Hughes <johnny at centos.org>

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. 
> 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.

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