Comment 35 for bug 1310316

Andreas Ritter (eddie8) wrote :

Also affected, mostly scaling factor goes up to 3, try to change with gnome-tweak-tool or unity-tweak-tool without any afford.

Ubuntu 14.04, beside Google Chrome no extra PPAs
MSI Adora22 (Intel Core i3 4100M, Intel HD-Grafik 4600)

Here you can find a workaround:
http://askubuntu.com/questions/469515/adjust-text-scaling-factor-for-all-users

But this is no solution at all, there must be a bug somewhere.