Re: [gdm-list] GDM problem with login screen

[Cosmin Neagu <cosmin neagu omnilogic ro>]

Hello again.


I serach on different forums, but i could'n find a solution until now.
What i did was a purge o all nvidia driver, and do a fresh reinstall. 
After that, i noticed 2 things happening:
1. If i enter: #startx, the X server starts without asking me for 
user/pass but it sais somthing about a strange user (see attach).
2. If i enter: #sudo /etc/init.d/gdm start - then the same problem whit 
flashing login screen apear.
   Since i'n no linux guru, have no ideea what's with this behavior.

I'm stil waiting for someone who can help me get back my login screen.


Cosmin Neagu wrote:
> Hello everybody,
> This is my first email here, so don't judge me or my problem to harsh.
> For about 2 weeks i'm having some problems with my laptop and the 
> login screen. How the problem apeared:
>
> I was using Ubuntu 8.10, when someday, when I restarted the laptop the 
> login screen was flushing continuously and i wasn't able to login 
> because no login screen apeared. Only with CTRL+ALT+F1 i could get 
> into the sistem. Since anyway i was planning to upgrade to 9.04, i 
> didn't bother to see what was happend.
>
> Then i run 9.04 for a few days when the same problem occured. That was 
> very ugly, i belived it was because of some bugs in Ubuntu 
> distributions or caused by my hardware since it happend on two 
> diferent version.
>
> I heard of Linux Mint, so i have installed it, and after a while the 
> same problem, login screen does not load, keeps flushing and playing 
> the welcome sound in backgroud continuously - now am writing from an 
> ugly windows XP.
> Since it apear that it is doing something in the backgroud like it was 
> tring to show the login screen i get into console and i looked at some 
> logs.
> tail -f /var/log/syslog
>
> May 15 13:00:45 Dell gdmgreeter[8399]: GdkPixbuf-CRITICAL: 
> gdk_pixbuf_get_width: assertion `GDK_IS_PIXBUF (pixbuf)' failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GdkPixbuf-CRITICAL: 
> gdk_pixbuf_get_height: assertion `GDK_IS_PIXBUF (pixbuf)' failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GLib-GObject-CRITICAL: 
> g_object_unref: assertion `G_IS_OBJECT (object)' failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GdkPixbuf-CRITICAL: 
> gdk_pixbuf_get_width: assertion `GDK_IS_PIXBUF (pixbuf)' failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GdkPixbuf-CRITICAL: 
> gdk_pixbuf_get_height: assertion `GDK_IS_PIXBUF (pixbuf)' failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GLib-GObject-CRITICAL: 
> g_object_unref: assertion `G_IS_OBJECT (object)' failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GLib-GObject-WARNING: invalid 
> (NULL) pointer instance
> May 15 13:00:45 Dell gdmgreeter[8399]: GLib-GObject-CRITICAL: 
> g_signal_connect_data: assertion `G_TYPE_CHECK_INSTANCE (instance)' 
> failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GdkPixbuf-CRITICAL: 
> gdk_pixbuf_get_width: assertion `GDK_IS_PIXBUF (pixbuf)' failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GdkPixbuf-CRITICAL: 
> gdk_pixbuf_get_height: assertion `GDK_IS_PIXBUF (pixbuf)' failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GLib-GObject-CRITICAL: 
> g_object_unref: assertion `G_IS_OBJECT (object)' failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GdkPixbuf-CRITICAL: 
> gdk_pixbuf_get_width: assertion `GDK_IS_PIXBUF (pixbuf)' failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GdkPixbuf-CRITICAL: 
> gdk_pixbuf_get_height: assertion `GDK_IS_PIXBUF (pixbuf)' failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GLib-GObject-CRITICAL: 
> g_object_unref: assertion `G_IS_OBJECT (object)' failed
> May 15 13:00:45 Dell gdmgreeter[8399]: GLib-GObject-WARNING: invalid 
> (NULL) pointer instance
>
> Spend a few hours on google, and the problem seemed to be with my 
> graphin nvidia card. Finally i have installed the drivers version 
> 180.51 and everything was ok.
> #glxinfo reported everything right.
> But today (with Ubuntu 9.04, nvidia 180.51 and all updates done) the 
> same problem reapeared.
>
> OK, the logs say like this while the login screen keeps flashing:
> - From syslog:
> May 19 09:45:45 Dell gdm[2885]: WARNING: Couldn't authenticate user
> May 19 09:45:47 Dell gdm[2885]: WARNING: Couldn't authenticate user
> May 19 09:45:50 Dell gdm[2885]: WARNING: Couldn't authenticate user
> May 19 09:45:52 Dell gdm[2885]: WARNING: Couldn't authenticate user
> May 19 09:45:56 Dell gdm[2885]: WARNING: Couldn't authenticate user
> May 19 09:45:59 Dell gdm[2885]: WARNING: Couldn't authenticate user
> May 19 09:46:00 Dell gdm[2885]: WARNING: Couldn't authenticate user
> May 19 09:46:03 Dell gdm[2885]: WARNING: Couldn't authenticate user
> May 19 09:46:05 Dell gdm[2885]: WARNING: Couldn't authenticate user
> May 19 09:46:07 Dell gdm[2885]: WARNING: Couldn't authenticate user
>
> - From auth.log:
> May 19 09:46:01 Dell gdm[2885]: pam_nologin(gdm:auth): cannot 
> determine username
> May 19 09:46:02 Dell gdm[2885]: pam_nologin(gdm:auth): cannot 
> determine username
> May 19 09:46:03 Dell gdm[2885]: pam_nologin(gdm:auth): cannot 
> determine username
> May 19 09:46:04 Dell gdm[2885]: pam_nologin(gdm:auth): cannot 
> determine username
> May 19 09:46:05 Dell gdm[2885]: pam_nologin(gdm:auth): cannot 
> determine username
> May 19 09:46:06 Dell gdm[2885]: pam_nologin(gdm:auth): cannot 
> determine username
> May 19 09:46:07 Dell gdm[2885]: pam_nologin(gdm:auth): cannot 
> determine username
>
> The config files:
> /etc/pam.d/gdm
> #%PAM-1.0
> auth    requisite       pam_nologin.so
> auth    required        pam_env.so readenv=1
> auth    required        pam_env.so readenv=1 envfile=/etc/default/locale
> @include common-auth
> auth    optional        pam_gnome_keyring.so
> @include common-account
> session required        pam_limits.so
> @include common-session
> session optional        pam_gnome_keyring.so auto_start
> @include common-password
>
> /etc/pam.d/gdm-autologin
> #%PAM-1.0
> auth    requisite       pam_nologin.so
> auth    required        pam_env.so readenv=1
> auth    required        pam_env.so readenv=1 envfile=/etc/default/locale
> auth    required        pam_permit.so
> @include common-account
> session required        pam_limits.so
> @include common-session
> @include common-password
>
> One more thing. Now, if i try glxinfo it says: Error: unable to open 
> display.
>
> So, can anyoane please help me with this problem? i realy like linux 
> for what it can do on the server side, but i cannot work without 
> graphic interface.
>
>
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