When I reboot I get a fresh login screen for several seconds? before the reboot starts

[Robert Heller]

At Sun, 25 Aug 2024 13:44:49 +0200 "Ubuntu user technical support,? not for general discussions" <ubuntu-users at lists.ubuntu.com> wrote:

> 
> Hi!
> 
> Le dim. 25 août 2024 à 13:40, Chris Green <cl at isbd.net> a écrit :
> 
> > On Sun, Aug 25, 2024 at 10:55:25AM +0100, Chris Green wrote:
> > > When I reboot my system (running xubuntu 24.04) either from the menus
> > > or from the command line ('sudo reboot') the GUI shuts down and I get
> > > my standard GUI login prompt for several seconds before the reboot
> > > actually starts.
> >
> >
> You may be seeing an old memory page from the login screen which is not
> wiped by the reboot code... And then after some time gets replaced by
> whatever is being drawn on it.

Actually not. I've seen this on other Linux systems. What is happening is the
shutdown process stops/kills *user* processes, which means that a logged in
user is logged out, that causes the xdm-ish process puts up a login screen (or
for a non-gui system, the *getty process reverts to a console login prompt).
This was generally more appearent in the olden days with slower systems (that
took longer to complete the shutdown process).  As the op says, the login 
screen is quickly replaced with the shutdown/reboot process -- the xdm-ish 
or *getty process gets killed, etc.

This is harmless. The *first* thing (or nearly the first thing) in the
shutdown process is to disable logins. So any short lived login screen or
prompt will be ineffective. 

> 
> Gilles
> 

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