Bug#834431: xdm: slow rendering of username/password window, the window is drawed from top to bottom

[Yegor Derevenets <yegor.derevenets@gmail.com>]

Hi,

I observed exactly the same problem. It seems that it was caused by X.org using
modesetting driver instead of intel (that it must have been using until
recently). Adding

Section "Device"
        Identifier  "Intel Graphics"
        Driver      "intel"
EndSection

to Xorg.conf has solved the problem.

-- 
Yegor Derevenets