Extreme lags in Hardy Heron

[Ryiden]

I have very frequently lags under Hardy Heron.
When such a lag comes up, my mouse moves like a dia show over the screen, sound hangs, and games are also like a dia show.

I have redirected the output of the applicatoin "top" into a text file by using the command
  "top -d 0.7 > ./top.txt"

In the next step I called the "glxgears" tool to track the next upcoming lag:
35085 frames in 5.0 seconds = 7016.815 FPS
35129 frames in 5.0 seconds = 7025.645 FPS
35117 frames in 5.0 seconds = 7023.373 FPS
35156 frames in 5.0 seconds = 7031.090 FPS
35036 frames in 5.0 seconds = 7007.101 FPS
35103 frames in 5.0 seconds = 7020.419 FPS
35123 frames in 5.0 seconds = 7024.408 FPS
35124 frames in 5.0 seconds = 7024.755 FPS
35123 frames in 5.0 seconds = 7024.414 FPS
35132 frames in 5.0 seconds = 7026.258 FPS
35119 frames in 5.0 seconds = 7023.774 FPS
27283 frames in 5.1 seconds = 5359.702 FPS
333 frames in 6.0 seconds = 55.369 FPS
35081 frames in 5.0 seconds = 7016.183 FPS
35121 frames in 5.0 seconds = 7024.186 FPS
35159 frames in 5.0 seconds = 7031.673 FPS
35134 frames in 5.0 seconds = 7026.629 FPS
35114 frames in 5.0 seconds = 7022.612 FPS
35131 frames in 5.0 seconds = 7026.113 FPS
35112 frames in 5.0 seconds = 7022.373 FPS

When the lag of 55.369 FPS came up, I have interrupted "top" with ctrl+c.
I think at line 208 in the top.txt file the lag came up, because the output is different to the other entries.

[Ryiden (hansgeorg-schwibbe-googlemail)]

Deactivating the function "Dim screen when inactive" helped to avoid this problem.

[Dereck Wonnacott (dereck)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please answer these questions:

* Is this reproducible?
* If so, what specific steps should we take to recreate this bug?

This will help us to find and resolve the problem.

[Ryiden (hansgeorg-schwibbe-googlemail)]

To reproduce:
1. Mark the checkbox as you can see it in the attachment
2. Install the nvidia binary driver
3. Run glxgears

[Ryiden (hansgeorg-schwibbe-googlemail)]

It is complete, because we figured out that the "Dim screen when inactive" function is doing something nasty with the system performance. I am using a german Desktop environment so the upper function is a free translation from the german language.

[Pedro Villavicencio (pedro)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. The issue that you reported is one that should be reproducible with the live environment of the Desktop CD of the development release - Intrepid Ibex. It would help us greatly if you could test with it so we can work on getting it fixed in the next release of Ubuntu. You can find out more about the development release at http://www.ubuntu.com/testing/ . Thanks again and we appreciate your help.

[Pedro Villavicencio (pedro)]

We are closing this bug report because it lacks the information we need to investigate the problem, as described in the previous comments. Please reopen it if you can give us the missing information, and don't hesitate to submit bug reports in the future. To reopen the bug report you can click on the current status, under the Status column, and change the Status back to New. Thanks again!.