Dash (no blur) renders black stripes while scrolling

[Sam_]

Reproducable on laptop (radeon mobility 4200) and pc (radeon hd 4350).
Select 'no blur' option for dash. (screenshot of ccsm)
Open dash - application lens, select to view all, start scrolling.
Result: dash renders black stripes. (video)

Second effect: No blur breaks panel transparency. bug 963649

~$ lspci -nnk | grep -i VGA -A2
01:05.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI RS880M [Mobility Radeon HD 4200 Series] [1002:9712]
 Subsystem: Hewlett-Packard Company Device [103c:1475]
 Kernel driver in use: radeon

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: unity 5.8.0-0ubuntu1
ProcVersionSignature: Ubuntu 3.2.0-20.32-generic 3.2.12
Uname: Linux 3.2.0-20-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 1.95-0ubuntu1
Architecture: amd64
CompizPlugins: [core,composite,opengl,compiztoolbox,decor,imgpng,obs,gnomecompat,snap,screenshot,regex,grid,workarounds,resize,move,expo,place,mousepoll,ezoom,session,winrules,wall,fade,scale,unityshell]
Date: Tue Mar 27 20:10:09 2012
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Alpha amd64 (20111129.1)
ProcEnviron:
 TERM=xterm
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

[Sam_ (and-sam)]

Video from pc there.
https://bugs.launchpad.net/ubuntu/+source/unity/+bug/964893/+attachment/2943875/+files/dash-scroll-black.ogv

~$ lspci -nnk | grep -i VGA -A2
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI RV710 [Radeon HD 4350] [1002:954f]
 Subsystem: PC Partner Limited Device [174b:174b]
 Kernel driver in use: radeon

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Bilal Akhtar (bilalakhtar)]

This appears to be driver-related, since with blur off I can't reproduce this.

We had similar issues with FGLRX back in the Natty cycle too.

[Sam_ (and-sam)]

Bilal, there is a misunderstanding, I can reproduce it only with 'no blur' option and I don't use proprietary drivers, please note lspci outputs.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Sam_ (and-sam)]

Unduped from bug 941066.
Reason:
- the issue hasn't be seen here before 5.8
- disagree with 'Desired resolution'

It is not desired to have a black aka tinted dash.
Expected is an option to disable the mourning dress.

IIRC there was the ability of dash to blur the background colour which disappeared, maybe it could be considered as a compromise option if transparency isn't desired by design.

[Doug McMahon (mc3man)]

Sam_ - this seems fixed in unity-5.10 - there is no more black on scrolling
Not to say you'll like it - the no-blur Dash is lightly tinted based on the average background color
I dislike it for the almost opposite reason - too much shows thru here & there is no way to adjust the opacity of the Dash separately like there is for the launcher & panel

[Sam_ (and-sam)]

Doug, thank you for the heads up.
I'll wait for 5.10 and if it's like your screenshot in #5 of bug 837401 it'll be fine.
I wouldn't have a problem with opacity, background colour or whatever option to adjust in order to finally achieve win-win.

[Adolfo Jayme Barrientos (fitojb)]

Duplicating again to bug 941066, as that report describes refers to the same than this one.

[Sam_ (and-sam)]

Well, #8 still stands.
Anyway, I like the fix allowing translucence of the background. Thank you.