Comments on: Ubuntu Nvidia Compiz “Black Window Bug” Fix

By: an onymous

an onymous — Wed, 10 Mar 2010 22:19:51 +0000

I encountered this with a 256MB nvidia 6600GT AGP card when the 'AGP Aperture size' in the BIOS was set to a value lower than the amount of memory on the video card. After upping the value in the BIOS, the problem went away.

By: noob ubuntu

noob ubuntu — Tue, 02 Sep 2008 20:57:01 +0000

THANK YOU

By: noob ubuntu

noob ubuntu — Tue, 02 Sep 2008 16:57:01 +0000

THANK YOU

By: Luke Hoersten

Luke Hoersten — Mon, 10 Mar 2008 23:31:26 +0000

I’m no expert but this could be a result of using indirect rendering. Indirect rendering, if I recall correctly, means all the desktop rendering is done through the X server which then renders on the graphics card instead of rendering straight from compiz to the graphics card. Extra buffers are introduced in this case. If you are experiencing slowdowns when using indirect rendering, chances are the problem is somewhere in there. I’ll try to look into this more when I get a chance.

Looks like for now you unfortunately have either the direct rendering BWB or the indirect rendering desktop slowdown. Let me know if you can fix either of these problems. Hopefully an Nvidia fix to the direct rendering reaches stable distros soon.

By: Zeljko

Zeljko — Mon, 10 Mar 2008 23:23:23 +0000

Hi, you have solved bwb issue, but after applying this patch desktop environment is not as responsive as it used to be. Windows are 20-30% slower, even my coursor lags sometimes. Overall feeling in use is like I have downgraded my machine.. could you help me with this?

By: Luke Hoersten

Luke Hoersten — Fri, 07 Mar 2008 04:43:53 +0000

Thanks a lot! I’m just trying to help.

By: RobTaintor

RobTaintor — Fri, 07 Mar 2008 04:36:15 +0000

Thank you very much for this fix. It seems so far that it has been very effective. I will update if I run into another problem. Keep up the good work

By: Luke Hoersten

Luke Hoersten — Thu, 14 Feb 2008 02:37:53 +0000

It looks like you understand. If you’ve done everything correctly, you should never see any black windows as far as I know (I’m no expert though).

By: Chino

Chino — Thu, 14 Feb 2008 02:35:47 +0000

PSS: Wiat a moment… then “The second problem is that compiz has a bug where it doesnâ€™t read the setting that the former line is intended to direct. The file Iâ€™ve linked too is an official development version of the file that takes care of reading the indirect rendering setting. ” so when we moved this file to the /usr/bin/compiz we told the compiz-fusion to look for the other file we created afterwards…. Now it makes sense.

Thanks a lot, LukeHoersten. This is as you said a lot easier than othe fixes, even for me who is a newbie with linux, just a matter of understand some things. I’ll make sure to paste this link whenever I see the BWB mentioned . Awesome work, keep it up, regards.

By: Chino

Chino — Thu, 14 Feb 2008 02:26:36 +0000

PS. I mean I undesrtand that with indirect rendering the windows are painted in a different way, which is probably why it solves the BWB problem, but the reason why compiz nows it has to pickup that file that did not exist before intrigues me….