Upgraded to kde4.10 rc3 and white screen?

[liamdawe]

So I upgraded to kde 4.10 RC3 and now when i try to boot it gets to a white screen with a mouse pointer and i can't do anything?

[kubicle]

Does this happen before or after you log in?

In other words, do you get the white screen before the login screen appears (in which case it's likely to be a graphic driver, Xorg or lightdm/kdm issue)...or do you get the login screen, but the white screen comes after you try to log into kde (in which case it's likely to be kde/plasma config issue)

[james147]

Try running this:

sudo apt-get update
sudo apt-get dist-upgrade 
sudo apt-get install -f kubuntu-desktop

[bootkiller]

This happen to me, installed kdm and it was solved so I'm guessing it's a problem with lightdm.

[Notsonoble]

I'm having this problem on one machine but not the other: KDM works, but LightDM won't load.

Machine that works:
Kubuntu 12.10 64 with backports ppa
Core 2 Duo
evga Nvidia 8600 GT 512 DDR2

Machine that doesn't
Kubuntu 12.10 64 with backports ppa
First Gen (1156) i5 quad core
pny Nvidia 630 2gb ddr2

the i5 is a new build, the core 2 duo is a dell vostro I've been running kubuntu since 10.10 on (upgrades, no wipes)