nvidia 3D/compiz performance is greatly reduced with each release
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
nvidia-graphics-drivers-173 (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned | ||
nvidia-graphics-drivers-180 (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
Binary package hint: compiz
glxgears shows the following fps on my Nvidia 8600GT card when compiz is running:
173.14.12 driver:
Hardy, 32 bit: 4900 fps
Hardy, 64 bit: 5000 fps
Intrepid, 32 bit: 4200 fps
177.80 driver:
Intrepid, 32 bit: 3000 fps
ie there is a massive 40% in performance between Hardy using the old and Intrepid using the new driver and a 15% drop if both use the old driver.
With compiz disabled, all combinations of O/S and driver show around 5800 fps.
So with the new 177.80 driver, compiz is reducing glxgear performance by close to 50%.
Version info:
Ubuntu 8.10, kernel 2.6.27-7-generic vs Ubuntu 8.04, kernel 2.6.24-21-generic
nvidia 173.14.12 and 177.80
compiz (Intrepid) 1:0.7.8-0ubuntu4.1
[lspci]
00:00.0 Host bridge [0600]: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub [8086:2a00] (rev 0c)
Subsystem: Dell Device [1028:022e]
01:00.0 VGA compatible controller [0300]: nVidia Corporation GeForce 8600M GT [10de:0407] (rev a1)
Subsystem: Dell Device [1028:022e]
description: | updated |
tags: | added: intrepid |
summary: |
- nvidia 3D/compiz performance is greatly reduced in Intrepid + nvidia 3D/compiz performance is greatly reduced with each release |
tags: | added: hardy |
tags: | added: jaunty |
status incomplete
glxgears is worthless as a benchmark; it doesn't exercise the same paths
as essentially any other 3d app. If you can reproduce this with a
worthwhile benchmark there may be something to fix - Phoronix apparently
has a benchmark suite, OpenArena has a benchmark mode, etc.