KDM skips login screen and hangs while trying to load KDE

[Stéphane]

Binary package hint: kdebase

I use Kubuntu 9.10 (karmic) on a generic desktop computer with Intel Core2 Duo and nVidia graphic card (with the proprietary nVidia driver). I use all the last official available karmic updates (27.02.2010):

Linux generic PAE 2.6.31-19.56
nVidia 185.18.36-0ubuntu9
xserver-xorg 1:7.4+3ubuntu10
KDE 4:4.3.5-0ubuntu~karmic1

When I boot the login screen of KDM appears very shortly, doesn't wait for user name or password and skips directly to the next step. The progress dialog for KDE appears and hangs at the first step (the stylized HDD). Important: I don't (and I never did) use the auto login feature of KDE! I use the Oxygen-Air theme (standard in karmic) as login theme.

Workaround: I press Ctrl+Alt+F1, login in tty1 and type: sudo killall kdm.
After being terminated, kdm automatically restarts and shows the login screen. There I can normally enter my password and login to KDE (without hanging in the progess dialog). It works but it is very annoying.

Thanks in advance for any help on this!

[alessandro pasotti (apasotti)]

Same here, step to reproduce:

1 - enable CTRL+ALT+BACKSPACE to kill X
2 - login into KDE and press CTRL+ALT+BACKSPACE
3 - go to console mode
4 - reboot
5 - KDM hangs as described above

Step to cure:

1 - when KDM hangs, press CTRL+ALT+1 (go to console tty1)
2 - login as root
3 - apt-get install --reinstall --purge kdm

There must be something stale in kdm rc files.

[Goh Lip (gohlip)]

By any chance did you install plymouth? If yes, you may encounter problems. Refer
https://bugs.launchpad.net/bugs/538524.
If no, you may want to try out new nvidia driver 'nouveau'.

[Stéphane (stephane-treboux)]

Thanks for your comments :-)

> By any chance did you install plymouth? If yes, you may encounter problems.

No, I use the USplash boot screen (standard in Kubuntu 9.10).

> Step to cure:
> 1 - when KDM hangs, press CTRL+ALT+1 (go to console tty1)
> 2 - login as root
> 3 - apt-get install --reinstall --purge kdm

Does this remove the bug once for all or just for a few next logins?

[alessandro pasotti (apasotti)]

@Goh: no, I did'nt install plymouth

@Stèphane: I don't know, but my guess is no. My procedure simply reset KDM configuration to the default, this let me point my finger to KDM rc files, there is probably something wrong when you don't do a clean exit from KDE that messes up the config files.
BTW I did not experience the problem again after the "cure"

Of course this is just an hypothesis.

I would exclude that the graphic card is involved: I have an Intel G45 on a Dell latitude 4300.

[Jonathan Thomas (echidnaman)]

Is this still an issue with Kubuntu 10.04?

[Stéphane (stephane-treboux)]

At least it never happened again on my computer since I updated to Kubuntu 10.04.
I would say this not an issue anymore on Kubuntu 10.04.

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