Jaunty and Compiz

[Dougal]

It's that old resizing bug which I have posted a request to be fixed over on the Compiz forum. Just thjought you guys n' gals would like to read my little investigation into what I found.
I have done some experimenting to narrow down the possibilities of the problem to - one.
As far as I can tell the problem is with Compiz and Ubuntu version 9.04 as follows;
I installed Ubuntu 8.10 onto a blank laptop (Dell Studio 1537 with an ATI HD 3450 graphics card with 256 Mb video ram, the laptop has a 2.53 GHz dual core chip and 4Gb RAM, so plenty of power).
The Ubuntu 8.10 install went without a hitch. I installed EnvyNG-QT to take care of installing the ATI driver suggested. All went well. I invoked the 'Extra' Visual Effects and tested X using the Sky Rocket screensaver which ran smoothly. I installed Compiz and set the Settings Manager to my preferred options. I tested the opening, minimizing, resizing and maximizing of several differnt program windows without any faults showing. The environment ran very smoothly. I installed my prefered window dressing package - Ubuntu SE. Again everything ran without fault.
I cleared the laptop and installed Ubuntu 9.04 and installed the graphics card driver as before and set the 'Extra' Visual Settings. Compiz is installed by default and I did notice straightaway that there was a lag on resizing any window.
NOTE: it would appear the bigger the window the longer the lag!!!
I uninstalled all Compiz parts and rebooted. I then ran several programs performing window resizing as before. All ran very smoothly and fast. I reinstalled Compiz and the Settings Manager and Hey Presto the resizing lag is back. So that leaves me with two choices; run Ubuntu with or without Compiz. At the moment I am running WITH because I find working with the effects very pleasing. It makes me feel like I am actually using a futuristic computing environment. The resizing bug is like having - well... a bug!! Hope you enjoyed reading my report.

[D-cat]

It sounds like the current compiz is re-introducing an older bug where the 3D desktop locked in all the acceleration resources and didn't give any to the programs. Did you try any other gl programs under 9.04 with compiz running (like certain screensavers, games or even just glxgears)? The problem may extend beyond resizing/redraw.

Disclaimer: I don't run compiz as of current and am not a dev, so my knowledge is not current on this topic. I simply want to throw ideas at possibly narrowing down the cause.