since last update system does not boot any more

[mike cloaked]

On Fri, Apr 1, 2011 at 7:58 PM, Adam Williamson <awilliam at redhat.com> wrote:

> systemd's native concept is 'targets'; graphical.target is roughly
> equivalent to runlevel 5 and multi-user.target is roughly equivalent to
> runlevel 3. rescue.target is roughly equal to runlevel 1, and there's
> emergency.target that's more or less what it sounds like. IIRC, the
> 'native' kernel parameter you can use to specify a particular target is
> systemd.default , so you could try:
>
> systemd.default=emergency.target
>
> or
>
> systemd.default=rescue.target
>
> as kernel parameters and see if those work.

It is also useful to know how to rescue a failed X session after
booting and in the middle of a graphical problem once logged in.

On the old (current!) days you could switch also to a non-graphical VT
and enter telinit 3 to go into runlevel 3 during a normal session or
if X broke, and then reenable runlevel 5 by telinit 5. Is there going
to remain an equivalent after f15 release - i.e. will switching to say
VT 3 using the standard shortcut still be possible - and then I guess
login as root and do systemctl stop prefdm.service and then systemctl
start prefdm.service to reenable the graphical screen?

-- 
mike c