How to restart the CDE without rebooting the server

[Lorenzo Meneguzzi]

Hi,
we have a HP9000 Class L2000 server running on HP-UX 11.00.
A screen, a keyboard, a mouse are connected to this server and we use them to manage the server through CDE. The screen is connected to an internal electonic board. The mouse and the keyboard are connected to an another internal electronic board(USB).
If the mouse or the keyboard are accidentally disconnected, they become unavailable and we need to reboot the server.
Is there a way to restart this USB card or CDE without rebooting ?
Thanks for your help.
Laurent.

[Lorenzo Meneguzzi]

I've already tried : dtlogin start|stop|reset but it didn't work

[Robert-Jan Goossens]

Hi Laurent,

/sbin/init.d/dtlogin.rc stop

/sbin/init.d/dtlogin.rc start

Regards,
Robert-Jan.

[Stefan Farrelly]

find the process dtsession and kill it, then cde login will respawn (if the sbin/init.d script didnt work).

[T G Manikandan]

/sbin/init.d/dtlogin.rc stop
/sbin/init.d/dtlogin.rc start

[Lorenzo Meneguzzi]

Lauching the dtlogin.rc start, the following error appears in the Xerrors file :
ERROR pid 1871 : hung in xopen display HAC031 attempt #1 aborting
ERROR pid 1871 : server open attempt #1 failed for HAC01:0, giving up.

Any Ideas ?

Thanks.

[Alex Glennie]

check hostname resolution is resolving correctly, ps -ef ¦ grep dtlogin ? What do you see on the actual graphics console

[Pete Randall]

Laurent.,

You could try dropping a run level: "init 2"


Pete

[Alex Glennie]

try /sbin/init 2
then a /usr/bin/X11/X :0

use ctrl shift break to kill it ...any errors ?
also check in /var/dt/Xerrors and /var/X11/Xserver/logs/X0.log

[Brian Lee_4]

You can bring down system to run level 2 and then bring it back to level 3 with "init" command to restart CDE daemons.

[Lorenzo Meneguzzi]

I've tried all the commands you suggested but
it's still not working. I think, in this case, the electronic board has to be resetted (reboot).
Thanks anyway for your help.

[Rick Beldin]

Generally, if you do disconnect the mouse or the keyboard, the Xserver (/usr/bin/X11/X) cannot talk to the device again until it is restarted.
A reboot is generally not necesary. USB devices support a kind of limited hot-plugging that depends on the hubd daemon to notice that the device has been removed or added. PHCO_26447 added this functionality to 11.00, which did not originally have this feature.

Also, in general to stop CDE temporarily, the previous posts are correct:

/sbin/init.d/dtlogin.rc stop

will stop CDE and

/sbin/init.d/dtlogin.rc start

will start it back up.

If you want to disable it across reboots, you can simply do:

/usr/dt/bin/dtconfig -d

This has the effect of modifying the /etc/rc.config.d/desktop file to prevent dtlogin from starting.

You can do:

/usr/dt/bin/dtconfig -e

to enable it again.

dtconfig -kill can also be used to kill the daemon. It performs the same as dtlogin.rc stop