Question

5

Cannot login via Unity login screen after upgrade to 12.04

rated 0 times [ 5] [ 0] / answers: 1 / hits: 21562 / 1 Year ago, thu, march 30, 2023, 10:44:11

Logging in via the shell accessed through Ctrl+Alt-F1 and logging in as guest via the graphical user interface work 0O

When I try to log into my standard user account via the graphical interface, the screen flashes to black for a couple of seconds and bumps me back to a pristine login screen. Entering a wrong password for my user account yields the standard error message - my user account and credential verification seem to be OK.

I suppose that my individual graphics configuration causes problems ... I'm not sure how to reset that. I've tried stopping the UI via

sudo service lightdm stop

executed

sudo nvidia-xconfig

and restarted the UI

sudo service lightdm start

to no avail.

My workstation has a Nvidia GeForce 560-448 graphics card. I've tried getting this fixed with the latest Nvidia 64-bit drivers (cURL'ed from the official website), that is 295.49 and the latest beta driver 302.07.

Anybody have an idea how to get this fixed? Your help is appreciated :)

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intssive

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3 Years ago

answered 1 Year ago peafowkes · Accepted Answer

I've changed the display manager from the default LightDM to GDM by installing latter via sudo apt-get install gdm. With GDM set as new display manager (execute sudo dpkg-reconfigure gdm if you couldn't set GDM as display manager during installation), I could log in via the old-school graphical login screen it presented me with after a reboot.

Once logged in, I reset my display manager to LightDM by executing sudo dpkg-reconfigure lightdm. After another reboot, things were back to normal: I can log in via the distribution's standard login UI, now.