Comment 20 for bug 1402551

I must correct my comment#14, because with downgrading only the xorg-server-core package, the problem persists.
You have to downgrade all xorg* relevant packages to a version before the security updates of the last weeks, as Francis Brown mentioned.

Furthermore I have tested the open-source driver nouevau. There is no memory leak, all is normal.
But with this driver the KDE effects are very slow and window moving is terribly slow, etc.

So I have to stick with the nvidia driver.