The Xorg process consumed more than 1GB after a few days of up-time, however, kwin process only used 60MB of memory, which could indicate it is different bug than the #1402551. Scrolling and switching between windows have become noticably slower. Probably this happened after I wrote and tested several Java GUI applications, but closing all of the GUI applications doesn't reduce the memory usage.
I am using the default intel graphics driver. I have nvidia but didn't use it.
lsb_release -rd
Description: Ubuntu 12.04.5 LTS
Release: 12.04
ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: xserver-xorg-core-lts-trusty 2:1.15.1-0ubuntu2~precise4
ProcVersionSignature: Ubuntu 3.13.0-40.69~precise1-generic 3.13.11.10
Uname: Linux 3.13.0-40-generic x86_64
ApportVersion: 2.0.1-0ubuntu17.8
Architecture: amd64
Date: Sun Dec 28 14:50:23 2014
ExecutablePath: /usr/bin/Xorg
InstallationMedia: Kubuntu 12.04.5 LTS "Precise Pangolin" - Release amd64 (20140807.1)
MarkForUpload: True
ProcEnviron:
TERM=linux
PATH=(custom, no user)
LANG=en_US.UTF-8
SourcePackage: xorg-server-lts-trusty
UpgradeStatus: No upgrade log present (probably fresh install)
rdbert, thank you for reporting this and helping make Ubuntu better.
Could you please run the following command once from a terminal by ensuring you have the package xdiagnose installed, and that you click the Yes button for attaching additional debugging information:
apport-collect -p xorg 1406057