Dear Maintainer,
apt-get dist-upgrade removed xserver-xorg-video-intel from this Debian Sid system, resulting in X being a bit sluggish. re-installing fixes that.
quoting from /var/log/apt/history.log
Start-Date: 2015-05-06 07:37:55
Commandline: apt-get dist-upgrade
Install: libx265-43:i386 (1.5-1, automatic), libisl13:i386 (0.14-2, automatic), gcc-5-base:i386 (5.1.1-4, automatic), libgphoto2-po
rt12:i386 (2.5.7-5, automatic)
Upgrade: console-setup:i386 (1.124, 1.125), libcap-ng0:i386 (0.7.4-2, 0.7.4-3), xserver-xorg-video-tdfx:i386 (1.4.6-1, 1.4.6-1+b1),
slime:i386 (2.10.1-3, 2.13-1), xserver-xorg-video-vmware:i386 (13.1.0-1, 13.1.0-1+b1), gcj-4.9-jre:i386 (4.9.2-10, 4.9.2-16), node
js-dev:i386 (0.10.29~dfsg-2, 0.10.38~dfsg-1), libzvbi0:i386 (0.2.35-3, 0.2.35-6), libzvbi-common:i386 (0.2.35-3, 0.2.35-6), ftp:i38
6 (0.17-31, 0.17-33), libsane:i386 (1.0.24-9, 1.0.24-9+b1), libdjvulibre21:i386 (3.5.25.4-4+b1, 3.5.27.1-1), libcloog-isl4:i386 (0.
18.2-1+b2, 0.18.3-1), libatk1.0-data:i386 (2.14.0-1, 2.16.0-2), libfile-which-perl:i386 (1.17-1, 1.18-1), xserver-xorg-video-sisusb
:i386 (0.9.6-2+b2, 0.9.6-2+b3), keyboard-configuration:i386 (1.124, 1.125), vlc-plugin-samba:i386 (2.2.0-1, 2.2.1-1), xserver-xorg-
core:i386 (1.16.4-1, 1.17.1-2), libdjvulibre-text:i386 (3.5.25.4-4, 3.5.27.1-1), gcc-4.9-base:i386 (4.9.2-10, 4.9.2-16), xserver-xo
rg-video-mga:i386 (1.6.4-1, 1.6.4-1+b1), libgcc-4.8-dev:i386 (4.8.4-1, 4.8.4-2), libquadmath0:i386 (4.9.2-10, 5.1.1-4), console-set
up-linux:i386 (1.124, 1.125), gcc-4.8-base:i386 (4.8.4-1, 4.8.4-2), xserver-common:i386 (1.16.4-1, 1.17.1-2), g++-4.9:i386 (4.9.2-1
0, 4.9.2-16), libatomic1:i386 (4.9.2-10, 5.1.1-4), libgcc-4.9-dev:i386 (4.9.2-10, 4.9.2-16), libgcj15:i386 (4.9.2-10, 4.9.2-16), xs
erver-xorg-video-nouveau:i386 (1.0.11-1, 1.0.11-1+b1), xserver-xorg-video-openchrome:i386 (0.3.3-1+b2, 0.3.3-1+b3), libstdc++-4.9-d
ev:i386 (4.9.2-10, 4.9.2-16), libitm1:i386 (4.9.2-10, 5.1.1-4), libstdc++6:i386 (4.9.2-10, 5.1.1-4), cl-swank:i386 (2.10.1-3, 2.13-
1), gir1.2-atk-1.0:i386 (2.14.0-1, 2.16.0-2), libasan0:i386 (4.8.4-1, 4.8.4-2), libasan1:i386 (4.9.2-10, 4.9.2-16), libgphoto2-6:i3
86 (2.5.4-1.1+b2, 2.5.7-5), libtk8.6:i386 (8.6.2-1, 8.6.4+dfsg-2), vlc-plugin-notify:i386 (2.2.0-1, 2.2.1-1), telnet:i386 (0.17-36,
0.17-40), libatspi2.0-0:i386 (2.14.0-1, 2.16.0-1), libgomp1:i386 (4.9.2-10, 5.1.1-4), xserver-xorg-video-fbdev:i386 (0.4.4-1+b2, 0
.4.4-1+b3), nodejs:i386 (0.10.29~dfsg-2, 0.10.38~dfsg-1), tk8.6:i386 (8.6.2-1, 8.6.4+dfsg-2), libgfortran3:i386 (4.9.2-10, 5.1.1-4)
, gcj-4.9-jre-headless:i386 (4.9.2-10, 4.9.2-16), libtiff5:i386 (4.0.3-12.3, 4.0.3-13), xserver-xorg-video-radeon:i386 (7.5.0-1, 7.
5.0-1+b1), vlc:i386 (2.2.0-1, 2.2.1-1), libcilkrts5:i386 (4.9.2-10, 5.1.1-4), libio-socket-ssl-perl:i386 (2.013-1, 2.014-1), xserve
r-xorg-video-qxl:i386 (0.1.1-2+b1, 0.1.1-2+b2), xserver-xorg-video-vesa:i386 (2.3.3-1+b3, 2.3.3-1+b4), libatk1.0-0:i386 (2.14.0-1,
2.16.0-2), xserver-xorg-video-trident:i386 (1.3.7-1, 1.3.7-1+b1), liblexical-sealrequirehints-perl:i386 (0.007-1+b2, 0.009-1), libg
cc1:i386 (4.9.2-10, 5.1.1-4), libtcl8.6:i386 (8.6.2+dfsg-2, 8.6.4+dfsg-2), tcl8.6:i386 (8.6.2+dfsg-2, 8.6.4+dfsg-2), cpp-4.8:i386 (
4.8.4-1, 4.8.4-2), cpp-4.9:i386 (4.9.2-10, 4.9.2-16), gcc-4.8:i386 (4.8.4-1, 4.8.4-2), gcc-4.9:i386 (4.9.2-10, 4.9.2-16), libavcode
c56:i386 (11.3-1, 11.3-2), libubsan0:i386 (4.9.2-10, 5.1.1-4), libgcj15-awt:i386 (4.9.2-10, 4.9.2-16), at-spi2-core:i386 (2.14.0-1,
2.16.0-1), vlc-nox:i386 (2.2.0-1, 2.2.1-1)
Remove: xserver-xorg-video-savage:i386 (2.3.7-2+b2), xserver-xorg-video-r128:i386 (6.9.2-1+b2), xserver-xorg-video-geode:i386 (2.11.16-7), xserver-xorg-video-neomagic:i386 (1.2.8-1+b2), xserver-xorg-video-modesetting:i386 (0.9.0-1+b1), xserver-xorg-video-siliconmotion:i386 (1.7.7-2+b2), xserver-xorg-video-cirrus:i386 (1.5.2-2+b1), xserver-xorg-video-intel:i386 (2.21.15-2+b2), xserver-xorg-video-mach64:i386 (6.9.4-2), xserver-xorg-video-all:i386 (7.7+8), xserver-xorg-video-ati:i386 (7.5.0-1)
End-Date: 2015-05-06 07:38:28