Question

How to remove or kill Xorg or make it behave!

Asked by: meverest

Hi all,

I have a redhat server running some network services (postgreSQL radius, etc) on which a wayward Xorg process intermittently hits 100% and stays there until a server reboot.  Sometimes it eventually causes the server to become unresponsive.

I have tried various suggested fixes found among online forums here and there, but nothing seems to have made much difference so far.

Since this is a server and I generally only need shell access, I figure that the Xwindows subsystem isn't needed - but not being overly familiar with redhat at all, I'm hoping someone can give me some hints as to what I need to do to get rid of Xorg completely.

Thanks in advance! :)

Mike.


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Asked On
2008-05-04 at 02:05:23ID23374671
Tags

linux

,

REDHAT

,

RedHat Linix Xorg 100% CPU problem

Topics

Red Hat Linux

,

Linux Administration

,

Linux

Participating Experts
5
Points
500
Comments
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Answers

 

by: illuzianPosted on 2008-05-04 at 02:51:41ID: 21495185

try moving/renaming gdm/kdm or xorg int /etc/init.d/

 

by: omarfaridPosted on 2008-05-04 at 02:52:02ID: 21495187

If you are looking for disabling the X windows, then look at /etc/inittab file and hash (put # at line beginning) the line:

x:5:respawn:/etc/X11/prefdm -nodaemon

 

by: meverestPosted on 2008-05-04 at 02:58:17ID: 21495200

Thanks illuzian - only thing that looks like any of those in init.d is "gpm".  There was a vncserver too, but I already removed that one.

omarfarid - I'll check that out.

Thanks.

 

by: meverestPosted on 2008-05-04 at 03:02:19ID: 21495204

In inittab there was this

x:5:once:/etc/X11/prefdm -nodaemon

looks close enough - I'll try commenting that out.

 

by: rindiPosted on 2008-05-04 at 04:59:55ID: 21495445

In /etc/inittab change the default runlevel to 3

id:3:initdefault:

and not

id:5:initdefault:

This will ensure you will not boot into X by default, and so X will also not be running. Once you are sure everything is running as it should you can always remove Xorg through Yum.

 

by: omarfaridPosted on 2008-05-04 at 05:21:43ID: 21495491

If you change your default run level from 5 to 3 (as recommended by rindi), make sure that all customized scripts to run your own services / applications are also copied / linked under /etc/rc3.d (which might be difficult to do).

 

by: duncan_roePosted on 2008-05-04 at 14:50:57ID: 21497077

I agree with rindi - runlevel 3 is the way to go. If you do have custom init.d scripts, you have presumably already followed the Red Hat guidelines and have a chkconfig comment near the front, e.g.:

07:47:04$ head iptables
#!/bin/sh
#
# iptables      Start iptables firewall
#
# chkconfig: 2345 08 92
# description:  Starts, stops and saves iptables firewall
#
# config: /etc/sysconfig/iptables
# config: /etc/sysconfig/iptables-config

The iptables script starts early (S08iptables), finishes late (K92iptables) and starts in runlevels 2, 3, 4 & 5.
The chkconfig utility makes all the right symbolic links, as long as you have that comment line (and the script is in /etc/rc.d/init.d)

 

by: meverestPosted on 2008-05-04 at 15:11:36ID: 21497132

Hi all,

This  is a very straightforward - base fedora core with freeradius and postgresql installed.  No other customisation done at all.  I normally use debian, but in this case I had to use redhat for support of the type of disk installed.

Therefore there are no other iniot.d scripts than those added by setup and by yum.

I don't know why Xorg should even be running, as I *never* use the console, only remote ssh.  I discover that something is wrong when the system becomes unresponsive, and then when I log in with ssh, I discover the Xorg running full blast.

So far I have just commented out that row in inittab, and the Xorg task has not appeared yet.  I tried using "yum remove Xorg" but it doesn't work - I assume because the package is not called 'Xorg' - how can I find out what it is called?

Cheers.

 

by: rindiPosted on 2008-05-04 at 15:19:25ID: 21497153

Try xorg all lowercase, or xorg-x11.

 

by: bpiriePosted on 2008-05-05 at 12:46:30ID: 21502461

The correct way to remove it is using yum's package group features.

#yum grouplist

This will return a list of all package groups.  Listed first are Installed group, followed by uninstalled (available) groups.  The group you want is "X Window System", so:

#yum groupremove "X Window System"

should remove xorg and all related components.

Do be sure, however, to follow the advice above regarding init scripts.  chkconfig --list will show you all services that are started at each runlevel.  Removing Xorg will likely change the default runlevel from 5 to 3 automatically, so be sure you make any necessary changes in advance.

 

by: meverestPosted on 2008-05-05 at 16:18:36ID: 21503750

Thanks everyone for your input.

I do not understand all this business about runlevel and init scripts.  I honestly cannot figure why Xorg is even run at all, as this is a headless server that runs even without a monitor attached.

Can someone explain how removing Xorg would cause any trouble at all?  Perhaps with an example of how it can all go belly-up?

Can anyone suggest how come Xorg even get's started up in this environment?

Regards,  Mike.

 

by: meverestPosted on 2008-05-05 at 16:20:39ID: 21503762

[mike@aussie ~]# chkconfig --list
NetworkManager  0:off   1:off   2:off   3:off   4:off   5:off   6:off
NetworkManagerDispatcher        0:off   1:off   2:off   3:off   4:off   5:off   6:off
acpid           0:off   1:off   2:off   3:on    4:on    5:on    6:off
anacron         0:off   1:off   2:on    3:on    4:on    5:on    6:off
apmd            0:off   1:off   2:on    3:on    4:on    5:on    6:off
atd             0:off   1:off   2:off   3:on    4:on    5:on    6:off
autofs          0:off   1:off   2:off   3:on    4:on    5:on    6:off
avahi-daemon    0:off   1:off   2:off   3:on    4:on    5:on    6:off
avahi-dnsconfd  0:off   1:off   2:off   3:off   4:off   5:off   6:off
bluetooth       0:off   1:off   2:on    3:on    4:on    5:on    6:off
cpuspeed        0:off   1:on    2:on    3:on    4:on    5:on    6:off
crond           0:off   1:off   2:on    3:on    4:on    5:on    6:off
cups            0:off   1:off   2:on    3:on    4:on    5:on    6:off
cups-config-daemon      0:off   1:off   2:off   3:on    4:on    5:on    6:off
dhcdbd          0:off   1:off   2:off   3:off   4:off   5:off   6:off
diskdump        0:off   1:off   2:off   3:off   4:off   5:off   6:off
firstboot       0:off   1:off   2:off   3:on    4:off   5:on    6:off
gpm             0:off   1:off   2:on    3:on    4:on    5:on    6:off
haldaemon       0:off   1:off   2:off   3:on    4:on    5:on    6:off
hidd            0:off   1:off   2:on    3:on    4:on    5:on    6:off
hplip           0:off   1:off   2:on    3:on    4:on    5:on    6:off
httpd           0:off   1:off   2:off   3:off   4:off   5:off   6:off
iptables        0:off   1:off   2:on    3:on    4:on    5:on    6:off
irda            0:off   1:off   2:off   3:off   4:off   5:off   6:off
irqbalance      0:off   1:off   2:on    3:on    4:on    5:on    6:off
isdn            0:off   1:off   2:on    3:on    4:on    5:on    6:off
kudzu           0:off   1:off   2:off   3:on    4:on    5:on    6:off
lm_sensors      0:off   1:off   2:on    3:on    4:on    5:on    6:off
mdmonitor       0:off   1:off   2:on    3:on    4:on    5:on    6:off
mdmpd           0:off   1:off   2:off   3:off   4:off   5:off   6:off
messagebus      0:off   1:off   2:off   3:on    4:on    5:on    6:off
named           0:off   1:off   2:off   3:off   4:off   5:off   6:off
netdump         0:off   1:off   2:off   3:off   4:off   5:off   6:off
netfs           0:off   1:off   2:off   3:on    4:on    5:on    6:off
netplugd        0:off   1:off   2:off   3:off   4:off   5:off   6:off
network         0:off   1:off   2:on    3:on    4:on    5:on    6:off
nfs             0:off   1:off   2:off   3:off   4:off   5:off   6:off
nfslock         0:off   1:off   2:off   3:on    4:on    5:on    6:off
nscd            0:off   1:off   2:off   3:off   4:off   5:off   6:off
ntpd            0:off   1:off   2:off   3:off   4:off   5:off   6:off
portmap         0:off   1:off   2:off   3:on    4:on    5:on    6:off
postgresql      0:off   1:off   2:off   3:off   4:off   5:on    6:off
psacct          0:off   1:off   2:off   3:off   4:off   5:off   6:off
radiusd         0:off   1:off   2:off   3:off   4:off   5:on    6:off
rdisc           0:off   1:off   2:off   3:off   4:off   5:on    6:off
readahead       0:off   1:off   2:off   3:off   4:off   5:on    6:off
readahead_early 0:off   1:off   2:on    3:on    4:on    5:on    6:off
rpcgssd         0:off   1:off   2:off   3:on    4:on    5:on    6:off
rpcidmapd       0:off   1:off   2:off   3:on    4:on    5:on    6:off
rpcsvcgssd      0:off   1:off   2:off   3:off   4:off   5:off   6:off
saslauthd       0:off   1:off   2:off   3:off   4:off   5:off   6:off
sendmail        0:off   1:off   2:on    3:on    4:on    5:on    6:off
smartd          0:off   1:off   2:on    3:on    4:on    5:on    6:off
smb             0:off   1:off   2:off   3:off   4:off   5:off   6:off
snmpd           0:off   1:off   2:off   3:off   4:off   5:off   6:off
snmptrapd       0:off   1:off   2:off   3:off   4:off   5:off   6:off
spamassassin    0:off   1:off   2:off   3:off   4:off   5:off   6:off
sshd            0:off   1:off   2:on    3:on    4:on    5:on    6:off
syslog          0:off   1:off   2:on    3:on    4:on    5:on    6:off
winbind         0:off   1:off   2:off   3:off   4:off   5:off   6:off
wpa_supplicant  0:off   1:off   2:off   3:off   4:off   5:off   6:off
xfs             0:off   1:off   2:on    3:on    4:on    5:on    6:off
ypbind          0:off   1:off   2:off   3:off   4:off   5:off   6:off
yum             0:off   1:off   2:off   3:off   4:off   5:off   6:off
[mike@aussie ~]#
                                              
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by: rindiPosted on 2008-05-05 at 23:33:51ID: 21505132

Many Linux setups will install X and also run in runlevel 5 by default. Runlevels are how PC startup. Runlevel 3 is the standard, multiuser, networking mode that doesn't start X, and runlevel 5 is the same but with X. So if you make sure your server starts into runlevel 3 and not 5, it won't be using X, and if it runs OK in that runlevel I'd leave it that way, or you could uninstall X later.

 

by: duncan_roePosted on 2008-05-06 at 03:54:13ID: 21506149

Just follow rindi's instructions earlier at http://www.experts-exchange.com/OS/Linux/Distributions/Red_Hat/Q_23374671.html#a21495445
You *could* comment out the line "x:5:respawn:/etc/X11/prefdm -nodaemon" as you posted earlier but that would have the downside that you'd likely end up with a single login console while runlevel 3 will give you 6 (usually, but always depending on the distribution).

 

by: omarfaridPosted on 2008-05-06 at 07:50:03ID: 21507743

You may hash the entry and hence it will not run.

 

by: meverestPosted on 2008-05-06 at 18:04:09ID: 31454867

Although I split the points to those comments that I actually ended up implementing, many thanks for ALL comments.

20120131-EE-VQP-002

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