After the upgrade from 11.10 to 12.04, the desktop was painfully slow, the lightdm process took 100% on a single core. Applying the workaround from bug #1005642 fixed the problem for me. Still, a very serious issue!
My hardware: HP xv6200 workstation with 4x Xeon 2.8 GHz, NVIDIA graphics.
After the upgrade from 11.10 to 12.04, the desktop was painfully slow, the lightdm process took 100% on a single core. Applying the workaround from bug #1005642 fixed the problem for me. Still, a very serious issue!
My hardware: HP xv6200 workstation with 4x Xeon 2.8 GHz, NVIDIA graphics.