Hi,
I have a login problem for all users. I installed 14.0 recently. Not only did the screen freeze so many times, but now all users can not login:

"A critical error is occurred. Please looks at KDM's logfile(s) for more
information or contact your system administrator."

1. Where is the KDM's logfile(s)?
2. How can I fix it?

Thanks for your help in advance.

Best,

KDM log file is in /var/log, there may also bo something useful in /var/log/syslog, post the contents.

Thanks for the reply. The file is large so I only copy the first "few" lines:
********************************************************************************
Note that your system uses syslog. All of kdm's internally generated messages
(i.e., not from libraries and external programs/scripts it uses) go to the
daemon.* syslog facility; check your syslog configuration to find out to which
file(s) it is logged.
********************************************************************************

resize called 1680 1050
klauncher(1925) kdemain: No DBUS session-bus found. Check if you have started the DBUS server.
kdeinit4: Communication error with launcher. Exiting!
kdmgreet(1919)/kdecore (K*TimeZone*): KSystemTimeZones: ktimezoned initialize() D-Bus call failed: "Not connected to D-Bus server"

kdmgreet(1919)/kdecore (K*TimeZone*): No time zone information obtained from ktimezoned
[mi] EQ overflowing. Additional events will be discarded until existing events are processed.

Backtrace:
0: /usr/bin/X (xorg_backtrace+0x49) [0x81b54b9]
1: /usr/bin/X (mieqEnqueue+0x22b) [0x819400b]
2: /usr/bin/X (0x8048000+0x44a05) [0x808ca05]
3: /usr/bin/X (xf86PostMotionEventM+0x24b) [0x80c64ab]
4: /usr/lib/xorg/modules/input/evdev_drv.so (0xb5fae000+0x3d1d) [0xb5fb1d1d]
5: /usr/lib/xorg/modules/input/evdev_drv.so (0xb5fae000+0x53c6) [0xb5fb33c6]
6: /usr/bin/X (0x8048000+0x6dd11) [0x80b5d11]
7: /usr/bin/X (0x8048000+0x9355a) [0x80db55a]
8: linux-gate.so.1 (__kernel_sigreturn+0x0) [0xffffe400]
9: /lib/libc.so.6 (ioctl+0x14) [0xb73eed24]
10: /usr/lib/libdrm.so.2 (drmIoctl+0x34) [0xb720aa74]
11: /usr/lib/libdrm.so.2 (drmCommandWrite+0x3c) [0xb720d63c]
12: /usr/lib/libdrm_nouveau.so.1 (0xb7233000+0x2d6f) [0xb7235d6f]
13: /usr/lib/libdrm_nouveau.so.1 (nouveau_bo_map_range+0x11e) [0xb723647e]
14: /usr/lib/libdrm_nouveau.so.1 (nouveau_bo_map+0x32) [0xb7236562]
15: /usr/lib/xorg/modules/drivers/nouveau_drv.so (0xb71d3000+0x442f) [0xb71d742f]
16: /usr/lib/xorg/modules/libexa.so (0xb7215000+0x884a) [0xb721d84a]
17: /usr/bin/X (0x8048000+0xfa254) [0x8142254]
18: /usr/bin/X (0x8048000+0x2c25f) [0x807425f]
19: /usr/bin/X (0x8048000+0x2fad5) [0x8077ad5]
20: /usr/bin/X (0x8048000+0x1d765) [0x8065765]
21: /lib/libc.so.6 (__libc_start_main+0xf5) [0xb732a5a5]
22: /usr/bin/X (0x8048000+0x1daa9) [0x8065aa9]

[mi] These backtraces from mieqEnqueue may point to a culprit higher up the stack.
[mi] mieq is *NOT* the cause. It is a victim.
[mi] EQ overflow continuing. 100 events have been dropped.


I hope it helps.

Best

Have you tried logging in to another desktop like Fluxbox to see if it would load?

If neither work you could try whats suggested here

http://slackware.com/config/x.php

You could even try the vesa driver to see if the noueau driver is causing the issue.

These are lines from syslog:
Jul 15 09:59:44 nmr last message repeated 3 times
Jul 15 09:59:47 nmr hp-systray: hp-systray[2034]: warning: hp-systray should not be run as root/superuser.
Jul 15 09:59:47 nmr hp-systray: hp-systray[2034]: error: hp-systray cannot be run as root. Exiting.
Jul 15 10:04:07 nmr console-kit-daemon[1796]: GLib-GObject-CRITICAL: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Jul 15 10:04:07 nmr console-kit-daemon[1796]: GLib-GObject-CRITICAL: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Jul 15 10:04:10 nmr kdm_greet[2091]: Cannot load /usr/share/apps/kdm/faces/.default.face.icon: Permission denied
Jul 15 10:04:24 nmr kdm: :0 '[2109]: Session "/usr/share/config/kdm/Xsession" execution failed: Permission denied
Jul 15 10:04:24 nmr kdm: :0 '[2109]: Failsafe client "/usr/bin/xterm" execution failed: Permission denied
Jul 15 10:04:33 nmr kdm_greet[2123]: Cannot load /usr/share/apps/kdm/faces/.default.face.icon: Permission denied
Jul 15 10:05:22 nmr console-kit-daemon[1796]: GLib-GObject-CRITICAL: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Jul 15 10:05:22 nmr last message repeated 3 times
Jul 15 10:05:23 nmr hp-systray: hp-systray[2207]: warning: hp-systray should not be run as root/superuser.
Jul 15 10:05:23 nmr hp-systray: hp-systray[2207]: error: hp-systray cannot be run as root. Exiting.
Jul 15 10:08:38 nmr console-kit-daemon[1796]: GLib-GObject-CRITICAL: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Jul 15 10:08:38 nmr console-kit-daemon[1796]: GLib-GObject-CRITICAL: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Jul 15 10:08:41 nmr kdm_greet[2381]: Cannot load /usr/share/apps/kdm/faces/.default.face.icon: Permission denied
Jul 15 10:08:54 nmr kdm: :0 '[2399]: Session "/usr/share/config/kdm/Xsession" execution failed: Permission denied
Jul 15 10:08:54 nmr kdm: :0 '[2399]: Failsafe client "/usr/bin/xterm" execution failed: Permission denied
Jul 15 10:09:01 nmr kdm_greet[2413]: Cannot load /usr/share/apps/kdm/faces/.default.face.icon: Permission denied
Jul 15 10:09:55 nmr console-kit-daemon[1796]: GLib-GObject-CRITICAL: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Jul 15 10:09:55 nmr last message repeated 3 times
Jul 15 10:09:56 nmr hp-systray: hp-systray[2497]: warning: hp-systray should not be run as root/superuser.
Jul 15 10:09:56 nmr hp-systray: hp-systray[2497]: error: hp-systray cannot be run as root. Exiting.
Jul 15 10:12:53 nmr console-kit-daemon[1796]: GLib-GObject-CRITICAL: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Jul 15 10:12:53 nmr console-kit-daemon[1796]: GLib-GObject-CRITICAL: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Jul 15 10:12:57 nmr kdm_greet[2712]: Cannot load /usr/share/apps/kdm/faces/.default.face.icon: Permission denied
Jul 15 10:13:11 nmr kdm: :0 '[2730]: Session "/usr/share/config/kdm/Xsession" execution failed: Permission denied
Jul 15 10:13:11 nmr kdm: :0 '[2730]: Failsafe client "/usr/bin/xterm" execution failed: Permission denied
Jul 15 10:13:29 nmr kdm_greet[2744]: Cannot load /usr/share/apps/kdm/faces/.default.face.icon: Permission denied
Jul 15 11:35:46 nmr kdm: :0 '[2769]: Session "/usr/share/config/kdm/Xsession" execution failed: Permission denied
Jul 15 11:35:46 nmr kdm: :0 '[2769]: Failsafe client "/usr/bin/xterm" execution failed: Permission denied
Jul 15 11:36:32 nmr kdm_greet[2784]: Cannot load /usr/share/apps/kdm/faces/.default.face.icon: Permission denied
Jul 15 11:36:43 nmr console-kit-daemon[1796]: GLib-GObject-CRITICAL: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Jul 15 11:36:44 nmr last message repeated 3 times
Jul 15 11:36:45 nmr hp-systray: hp-systray[2868]: warning: hp-systray should not be run as root/superuser.
Jul 15 11:36:45 nmr hp-systray: hp-systray[2868]: error: hp-systray cannot be run as root. Exiting.

Bad filesystem permissions, somehow? You might try: chmod 755 /

I just had a thought, you said you recently installed Slackware 14 and have experienced freezes and such since.

What was installed before? Did you try and upgrade from an earlier version of Slackware or replace another distro?

Also If you had a different distro before did you format your home partition as well as your root partition during the install?

The previous version of 13.1 and was installed few years ago.
I reinstalled everything. The previous version did not have any screen freeze problem.
I have tried to use startx in one of my user account, and it could not start anything.

The root does not have any problem, but all the user accounts have the same problem.

I will try chmod 755 /

Thanks for the suggestions.

If the chmod command doesn't work just remove all config files from your users directories. It sounds like a damaged or conflicting config file/files there may possibly be your culprit.

I asked about formatting because sometimes when people keep their old home partition for a new install they end up with problems like the permission issue you have. I've only heard of it when people install a different distro but it can't hurt to remove the old config files as when you reboot into that user the system will create new ones for you.

I have deleted all the stuff in .config directory and tried chmod 755 /, but still does not work.

run as root rm -Rf /home/"user"/.*

Replacing "user" with the name of your user.

Or if you'd rather in gui as root simply delete all directories and files in /home/"user"/ that have a . in front of them.

I have deleted all the .* files, and could not login.
Well, I am going to reinstall the software.

So you did a full install of 14.0? Did you retain any partitions from your previous system? I had some odd dbus messages from KDM at first too, but I don't recall now what I did to resolve them. I think I may have renamed the .kde folder in my home directory and let it create a new one, then merged in stuff I wanted to keep, like Kjots, Kalendar, and Kontact data.

You might consider just doing another full install, paying careful attention to the instructions in the Slackware-HOWTO file that is on the DVD / first CD.

Yes, I did a full install at the first time. Thanks for all your helps.

Best,

Sorry we weren't more helpful.