I've just purchased a Lenovo T540p and installed Ubuntu GNOME 14.10. So far, the performance of Gnome Shell has been very sub par. Animations like opening the activities overview or moving windows around from within the overview are choppy.
I have looked into various methods of resolving these issues like changing the
/etc/X11/xorg.conf.d/20-intel.conf, but nothing has changed the perfomance at all. I have also tried disabling vsync using
Most recently I tried using this ppa to update by drivers, but the lag still prevailed.
Currently everything is back to default. Any ideas on how to resolve this lag issue?
Turns out this lag issue is caused by the Intel HD 4600 Integrated Graphics not being fully supported in Ubuntu (Linux in general?). The graphics performance is fine when resolution is set to 1920x1080, but not when set to 2880x1620.