Visible banding in gradients even without screen calibration, none on Windows 8.1

[Nikolaus Waxweiler]

I recently bought a new monitor that shows no banding when looking at gradients in Windows 8.1 (even after calibration) and under fluxbox but does in Unity. It's not 16-bit-level-banding but definitively visible and exaggerated after screen calibration. Not nice when you want to do graphical work or are anal about display quality like me ;)

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.2.2+14.04.20140714-0ubuntu1.1
Uname: Linux 3.16.0-031600-generic x86_64
.tmp.unity.support.test.0:

ApportVersion: 2.14.1-0ubuntu3.3
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,vpswitch,snap,mousepoll,resize,place,move,wall,grid,regex,imgpng,session,gnomecompat,animation,fade,unitymtgrabhandles,workarounds,scale,expo,ezoom,unityshell]
CompositorRunning: compiz
CompositorUnredirectDriverBlacklist: '(nouveau|Intel).*Mesa 8.0'
CompositorUnredirectFSW: true
CurrentDesktop: Unity
Date: Sun Aug 10 16:46:03 2014
DistUpgraded: Fresh install
DistroCodename: trusty
DistroVariant: ubuntu
GraphicsCard:
 Advanced Micro Devices, Inc. [AMD/ATI] Cypress XT [Radeon HD 5870] [1002:6898] (prog-if 00 [VGA controller])
   Subsystem: PC Partner Limited / Sapphire Technology Device [174b:e140]
InstallationDate: Installed on 2014-03-28 (135 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Daily amd64 (20140328)
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-031600-generic root=UUID=9c15e448-c9f4-4058-9797-caf721af4d10 ro quiet splash vt.handoff=7
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 06/15/2012
dmi.bios.vendor: Intel Corp.
dmi.bios.version: BLH6710H.86A.0156.2012.0615.1908
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: DH67CL
dmi.board.vendor: Intel Corporation
dmi.board.version: AAG10212-204
dmi.chassis.type: 3
dmi.modalias: dmi:bvnIntelCorp.:bvrBLH6710H.86A.0156.2012.0615.1908:bd06/15/2012:svn:pn:pvr:rvnIntelCorporation:rnDH67CL:rvrAAG10212-204:cvn:ct3:cvr:
version.compiz: compiz 1:0.9.11.2+14.04.20140714-0ubuntu1
version.ia32-libs: ia32-libs N/A
version.libdrm2: libdrm2 2.4.52-1
version.libgl1-mesa-dri: libgl1-mesa-dri 10.1.3-0ubuntu0.1
version.libgl1-mesa-dri-experimental: libgl1-mesa-dri-experimental N/A
version.libgl1-mesa-glx: libgl1-mesa-glx 10.1.3-0ubuntu0.1
version.xserver-xorg-core: xserver-xorg-core 2:1.15.1-0ubuntu2
version.xserver-xorg-input-evdev: xserver-xorg-input-evdev 1:2.8.2-1ubuntu2
version.xserver-xorg-video-ati: xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1
version.xserver-xorg-video-intel: xserver-xorg-video-intel 2:2.99.910-0ubuntu1
version.xserver-xorg-video-nouveau: xserver-xorg-video-nouveau 1:1.0.10-1ubuntu2
xserver.bootTime: Sun Aug 10 16:06:11 2014
xserver.configfile: default
xserver.devices:
 input Power Button KEYBOARD, id 6
 input Power Button KEYBOARD, id 7
 input HID 046a:0011 KEYBOARD, id 8
 input Logitech USB-PS/2 Optical Mouse MOUSE, id 9
 input Binary Audio UAC1 DAC KEYBOARD, id 10
xserver.errors:

xserver.logfile: /var/log/Xorg.0.log
xserver.version: 2:1.15.1-0ubuntu2
xserver.video_driver: radeon

[Jaime Pérez (jaime-91)]

Seems a radeon driver issue

[Launchpad Janitor (janitor)]

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