Lightdm login interface doesn't display

[Pedro Cardoso]

whenever I reboot the lightdm display the mouse cursor but it doesn't show the login form. However if I type my password I login into my account. This hapens since I've moved to kubuntu 15.04 (upgrade from kubuntu 14.10). I've reinstalled lightdm and it keeps doing the same thing. Any ideas? Thkx, Pedro.

[Valentin Quequet (valentin-quequet)]

Hello, all.

I'm stroke by this exact same bug.

I can add that, when logged to this non-visible graphical session (in fact the framebuffer displays stale boot sequence text), I can type my password to login cause the field for the last user logged remains focused.

Then, I can move the visible mouse cursor. I move it to upper-right corner and co a left click. This unrolls blindly the power menu (still not visible). I strike keyboard up arrow once to activate the "Shutdown..." menu item, and then I strike Return and the shutdown sequence begins, and eventually, the computer shuts down in a few seconds.

Note: the User Interface has both keyboard focus and mouse focus, while not showing on screen.

Alternatively to trying to log into a blind session, I can switch VT and login as root and restart lightdm service (service lightdm restart) to gain this time a functional (displayed on screen) graphical session.

In hope this helps.

Sincerely,
Valentin

[Valentin Quequet (valentin-quequet)]

Sorry, I forgot to attach a screenshot.

[Pedro Cardoso (pcardoso)]

Thank you for completing my description.

It has the exactly same behaviour. Rebooting lightdm (or after a logout) gives the graphical login interface.

Regards,
Pedro.