Re: [CentOS] Centos 7 shim fix failed

[david]

At 05:01 PM 8/4/2020, you wrote:

Am 05.08.20 um 01:27 schrieb david:

At 04:18 PM 8/4/2020, you wrote:

Am 05.08.20 um 01:09 schrieb david:

At 01:54 PM 8/4/2020, you wrote:

On Tue, 04 Aug 2020 13:44:05 -0700
david wrote:

> After all the updates, the system was NOT bootable.

How long did you wait for it to boot, and what did it do when it failed to boot? What text messages showed up on the console? Any reported errors when you ran the update or when you rebooted the computer? If so, what did the say?

I personally haven't had any issues updating any of my computers (using a mix of Centos 6, 7 and 8) but maybe they're all too old to for the issue to show up.

--

How long did I wait:  5 minutes
What on the console:  nothing, just a dull gray color
Errors on update:  none
---------------------
But when I blocked the update, it booted within a minute, and ran.

Can you boot the system with all updates and secureboot=off?
(Just to be sure; I imply that you use UEFI, right?)

--
Leon
____________

I'm not sure how to turn 'secure boot' off or if it exists.
(MacMini5.2).  I presume it uses UEFI, but not sure how to answer that.

Oh, an apple device. AFAIK the openfirmware of such hardware have also a legacy mode. So first check if it uses the UEFI mode at all by checking

if this directory exists (in the working/bootable system):

# ls -la /sys/firmware/efi

if so test the secure boot state with

# mokutil --sb-state

Boot failure only occurs when the grub2/shim/mokutil updates are applied.

[root@xxx -]ls -la /sys/firmware/efi
total 0
drwxr-xr-x  5 root root    0 Aug  4 17:12 .
drwxr-xr-x  7 root root    0 Aug  4 14:30 ..
-r--r--r--  1 root root 4096 Aug  4 17:12 config_table
drwxr-xr-x  2 root root    0 Aug  4 14:30 efivars
-r--r--r--  1 root root 4096 Aug  4 17:12 fw_platform_size
-r--r--r--  1 root root 4096 Aug  4 17:12 fw_vendor
-r--r--r--  1 root root 4096 Aug  4 17:12 runtime
drwxr-xr-x 10 root root    0 Aug  4 17:12 runtime-map
-r--------  1 root root 4096 Aug  4 14:31 systab
drwxr-xr-x 23 root root    0 Aug  4 17:12 vars
[root@xxx ~]# mokutil --sb-state
This system doesn't support Secure Boot
[root@xxx ~]#



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