UHD 4k Resolution Unity DE bug window in Chrome(mium) and Steam

[Dmitry]

What steps will reproduce the problem?
1. Install chrome on ubuntu 14.10
2. Setup 4k resoltion
3. Work 10 minutes and see this

fglrx video

I don`t now how to reproduce this bug, but it's lagged when i hover on shared window panel
new video from smartphone

Most of all it bugged in Chrome and Chromium
http://www.youtube.com/watch?v=dQDtCMl5hrk

And sometimes after chrome.....
http://www.youtube.com/watch?v=aH6b3pdPlls&list=UUIhgsouueZpNRiva6y4oHhw

https://code.google.com/p/chromium/issues/detail?id=424927&can=4&colspec=ID%20Pri%20M%20Iteration%20ReleaseBlock%20Cr%20Status%20Owner%20Summary%20OS%20Modified

ovr@ovr-desktop:~$ lsb_release -rd
Description: Ubuntu 14.10
Release: 14.10

Package: fglrx
Versions:
2:14.201-0ubuntu2 (/var/lib/apt/lists/ru.archive.ubuntu.com_ubuntu_dists_utopic_restricted_binary-amd64_Packages) (/var/lib/dpkg/status)

ovr@ovr-desktop:~$ xdpyinfo | grep dimensions
  dimensions: 3840x2160 pixels (1016x572 millimeters)

ovr@ovr-desktop:~$ unity --version
unity 7.3.1

ProblemType: Bug
DistroRelease: Ubuntu 14.10
Package: chromium-browser 37.0.2062.94-0ubuntu1~pkg1065
ProcVersionSignature: Ubuntu 3.16.0-23.30-generic 3.16.4
Uname: Linux 3.16.0-23-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.7-0ubuntu7
Architecture: amd64
CurrentDesktop: Unity
Date: Tue Oct 21 21:09:05 2014
InstallationDate: Installed on 2014-10-05 (15 days ago)
InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Alpha amd64 (20140923)
SourcePackage: chromium-browser
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.default.chromium.browser: [deleted]

[Chad Miller (cmiller)]

Please attach output of "dmesg" command too.

$ dmesg > ~/dmesg-for-lp1383667

[Dmitry (talk-r)]

Any news on it?

[Chad Miller (cmiller)]

It has to be a problem in the video driver.