[Lenovo E450] ([Radeon R7 M260] [1002:6900]) [Lenovo E550] ([Radeon R7 M265] [1002:6604]) Display abnormally on both screen under extend mode.

[Gabriel Zhi Chen]

CID : 201411-16166 Lenovo E450 (I+A) with 14.04.2 (utopic)
CID : 201411-16167 Lenovo E550 (I+A) with 14.04.2 (utopic)

Steps:
1. Install 14.04.2 on E450.
2. Log in system and install fglrx.
3. Reboot system.
4. Connect HDMI cable.
5. Switch internal, external, mirror and extend modes by display key.

Expected result:
The 4 modes show normally.

Actual result:
Display abnormally on both screen under extendl mode. Please refer to picture.jpg

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.16.0-30-generic 3.16.0-30.40~14.04.1 [modified: boot/vmlinuz-3.16.0-30-generic]
ProcVersionSignature: Ubuntu 3.16.0-30.40~14.04.1-generic 3.16.7-ckt3
Uname: Linux 3.16.0-30-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.7
Architecture: amd64
CurrentDesktop: Unity
Date: Thu Mar 19 02:42:21 2015
InstallationDate: Installed on 2015-03-16 (2 days ago)
InstallationMedia: Ubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: linux-lts-utopic
UpgradeStatus: No upgrade log present (probably fresh install)

[Gabriel Zhi Chen (gabrielzchen)]

The bug can be reproduced on 201411-16167 Lenovo E550

[Gabriel Zhi Chen (gabrielzchen)]

On I+A platforms, the issue only reproduced on discrete card, it can not repro under integrated display card working.

[Keng-Yu Lin (lexical)]

need `lspci -vnnn`

[Gabriel Zhi Chen (gabrielzchen)]

@Keng-Yu, please refer to lscpi-vnnn.log in attachments. Thanks.

[Keng-Yu Lin (lexical)]

00:02.0 VGA compatible controller [0300]: Intel Corporation Broadwell-U Integrated Graphics [8086:1616] (rev 09) (prog-if 00 [VGA controller])

[Keng-Yu Lin (lexical)]

05:00.0 Display controller [0380]: Advanced Micro Devices, Inc. [AMD/ATI] Opal XT [Radeon R7 M265] [1002:6604] (rev ff) (prog-if ff)
 !!! Unknown header type 7f

[penalvch (penalvch)]

Gabriel Zhi Chen, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1433920

[Launchpad Janitor (janitor)]

[Expired for linux (Ubuntu) because there has been no activity for 60 days.]