AMD Radeon R7 M265 [1002:6604] Unable to resume from suspend with proprietary fglrx / fglrx-update driver

CID: 201410-15952 Dell Inspiron 7548

This system cannot resume from suspend with the proprietary driver, neither fglrx (2:13.350.1-0ubuntu2) nor fglrx-update (2:13.350.1-0ubuntu2)
But it works with the opensource one.

The discrete graphic card on this system is AMD Radeon R7 M265 [1002:6604].

Steps:
1. Install 14.04.1 + update + proprietary video driver and reboot
2. Suspend
3. Wake it up

Expected result:
* S3 works as expected.

Actual result:
* System hang after resume suspend.

This bug is simliar to bug 1308954, I will need to verify this with the driver from AMD later.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-43-generic 3.13.0-43.72
ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
Uname: Linux 3.13.0-43-generic x86_64
NonfreeKernelModules: fglrx
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: ubuntu 1781 F.... pulseaudio
 /dev/snd/controlC1: ubuntu 1781 F.... pulseaudio
CRDA:
 country TW:
  (2402 - 2472 @ 40), (3, 27)
  (5270 - 5330 @ 40), (3, 17), DFS
  (5735 - 5815 @ 40), (3, 30)
CurrentDesktop: Unity
Date: Mon Jan 5 21:58:12 2015
HibernationDevice: RESUME=UUID=3121f09d-4ad7-4946-b905-ee8e56a6d914
InstallationDate: Installed on 2015-01-05 (0 days ago)
InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
MachineType: Dell Inc. Inspiron 7548
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-generic.efi.signed root=UUID=57666a30-96f3-478b-b3c1-3879ce81c53f ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-43-generic N/A
 linux-backports-modules-3.13.0-43-generic N/A
 linux-firmware 1.127.10
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/19/2014
dmi.bios.vendor: Dell Inc.
dmi.bios.version: A00
dmi.board.name: BBE4C1
dmi.board.vendor: Dell Inc.
dmi.board.version: A00
dmi.chassis.type: 8
dmi.chassis.vendor: Dell Inc.
dmi.chassis.version: Not Specified
dmi.modalias: dmi:bvnDellInc.:bvrA00:bd11/19/2014:svnDellInc.:pnInspiron7548:pvrA00:rvnDellInc.:rnBBE4C1:rvrA00:cvnDellInc.:ct8:cvrNotSpecified:
dmi.product.name: Inspiron 7548
dmi.product.version: A00
dmi.sys.vendor: Dell Inc.