On 10/27/2018 07:08 PM, Orion Poplawski wrote:
> On 10/27/18 10:42 AM, Yasha Karant wrote:
>> Using yumex, rather than doing a full update to SL 7.5 production, I
>> attempted to update over the network the kernel, firmware, and libgcc,
>> allowing yumex (essentially yum) to establish the needed dependencies
>> (other applications, etc., that also needed to be updated).  The
>> resulting kernel will not boot, but merely hangs.  If one waits long
>> enough, the "progress bar" at the bottom of the screen does show the
>> typical blue/white progression, but that is all.  When I reboot and
>> manually select the previous kernel, the system reboots.  I am using
>> MATE for a "control" GUI, although as the system never gets to the login
>> screen, MATE should not be "active".   It appears that yumex (yum) does
>> not fully resolve all required dependencies.  What other components must
>> I update?
>
> Pressing <ESC> should get you the text boot messages which hopefully 
> should point you towards what is going wrong - or remove rhgb from the 
> kernel command line.
>
>
Following your suggestion, I pressed <ESC> .  Ultimately, the boot hung 
at "Waiting for Plymouth boot screen to quit ..."

Was something misconfigured/misinstalled by the yumex update of the kernel?

I did note from the text messages that "Starting Gnome Display Manager" 
appeared at multiple steps.