Unity

Visible tearing at pixel column where Launcher would be

Bug #775829 reported by Marcus Zuber on 2011-05-02

92

This bug affects 21 people

Affects		Status	Importance	Assigned to	Milestone
	Unity	Expired	Medium	Unassigned
	unity (Ubuntu)	Expired	Medium	Unassigned

Bug Description

This happens in many applications, the easiest to reproduce is under Firefox;

  1. Load Firefox
  2. Maximise Firefox (Launcher will hide if not already hidden)
  3. Open a tall page in Firefox (eg. http://lwn.net/daily )
  4. Scroll the page vertically

What happens:

5. There is a visible tearing a where the right-hand edge of the Launcher would be if it had not been hidden.

What should happen:

6. Ideally a hidden Launcher should not cause glitches in application windows that it is (not) covering.

=======Original Report=========

When I scroll in a program (tested with firefox 4.0.1 and nautilus) the left part of the screen (the part where the "unity launcher" shows up) scrolls a bit delayed, which creates a tearing effect. I use the newest ccc ati driver.

See original description

Revision history for this message

Omer Akram (om26er) wrote on 2011-05-02:

#1

could you please attach a video to show the problem?

Changed in unity:
status:	New → Incomplete
Changed in unity (Ubuntu):
status:	New → Incomplete

Revision history for this message

Marcus Zuber (marcuszuber) wrote on 2011-05-04:

#2

out.ogv Edit (3.0 MiB, video/ogg)

Video:

Marco Biscaro (marcobiscaro2112) on 2011-05-04

Changed in unity:
status:	Incomplete → New
Changed in unity (Ubuntu):
status:	Incomplete → New

Revision history for this message

Pako (elektrobank01) wrote on 2011-05-06:

#3

I can confirm the same on nVidia card. It happens only with proprietary driver.

Revision history for this message

Jared Davenport (jared-davenport1) wrote on 2011-05-15:

#4

This affects me also on both of my computers with ATI and Intel graphics.

Revision history for this message

robin0800 (robin-linux-hotmail) wrote on 2011-05-21:

#5

Mostly on web pages using Gallium 0.4 on ATI RV350.
This I think is a Gallium driver problem as before release I could blacklist this driver and the tearing stopped.
( just as a note, since release, I cannot find a way to blacklist this driver.)

Revision history for this message

Omer Akram (om26er) wrote on 2011-05-21:

#6

are you sure this does not happen in Ubuntu Classic session with compiz as the window manager?

Changed in unity:
status:	New → Incomplete
Changed in unity (Ubuntu):
status:	New → Incomplete

Revision history for this message

Ek123 (ekillick) wrote on 2011-05-21:

#7

I have an ATI Radeon HD4890 and am also having the same problem. It doesn't happen in an Ubuntu Classic session; I am fairly certain that it is somehow caused by Unity's launcher since the area affected seems to be the same size as the launcher. If I scroll using the scrollbar or even by click-dragging the mousewheel there doesn't seem to be a problem.
While it has been most noticeable in Firefox, I have tried it in other applications and it seems to happen to a lesser extent in some of them.

Ek123 (ekillick) on 2011-05-21

description:

updated

Revision history for this message

Hans Bronk (h-c-bronk) wrote on 2011-05-31:

#8

This also happens for me, in firefox and gedit, but only when i use the mouse scroll wheel.

Omer Akram (om26er) on 2011-08-24

description:	updated
Changed in unity:
importance:	Undecided → Medium
Changed in unity (Ubuntu):
importance:	Undecided → Medium
Changed in unity:
status:	Incomplete → Confirmed
Changed in unity (Ubuntu):
status:	Incomplete → Confirmed
summary:	- Tearing when scrolling + Visible tearing at pixel column where Launcher would be

Revision history for this message

Jim (jimvernon) wrote on 2011-09-12:

#9

I've been having this problem too. Disabling vsync and auto detect refresh rate, then bumping the refresh rate to 60 in the Compiz Config seems to have solved it for me.

Revision history for this message

Florentin (elmophp) wrote on 2011-10-21:

#10

Hi, I have the same issue, I'm using an Nvidia card. It happens in both Natty and Oneiric.
Disabling OpenGL > Sync to VBlank in CCSM makes the videos tearing.
The launcher tearing doesn't happen in Ubuntu-2d.

Revision history for this message

maxpagels (max-pagels1) wrote on 2012-01-01:

#11

I'm also having this issue (Nvidia card, GTX 470). The same effect also happens when playing a flash video or other hardware accelerated video behind the foreground window.

Interestingly, the same also happens in Windows 7, which makes me suspect that this is a proprietary driver issue or hardware overlay issue.

Revision history for this message

Omer Akram (om26er) wrote on 2012-07-17:

#12

is that still an issue in Ubuntu 12.04?

Changed in unity:
status:	Confirmed → Incomplete
Changed in unity (Ubuntu):
status:	Confirmed → Incomplete

Revision history for this message

Launchpad Janitor (janitor) wrote on 2012-09-16:

#13

[Expired for Unity because there has been no activity for 60 days.]

Changed in unity:
status:	Incomplete → Expired

Revision history for this message

Launchpad Janitor (janitor) wrote on 2012-09-16:

#14

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

Changed in unity (Ubuntu):
status:	Incomplete → Expired

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