** Description changed:
- On my Z600, with a fresh Precise installation, after installing the
- NVIDIA driver 295.40 (same version as in gPrecise), glxgears runs
- extremely slowly full-screen. When running on Precise, Chrome's GPU
- accelerated rendering path produces correct results, albeit extremely
- slowly.
+ The main problem is that OpenGL apps run slower with unityshell compared
+ to plain compiz (Gnome Classic).
+
+ In extreme cases, running glmark2 under Unity only achieves 0-3 FPS. Yet
+ on the same machine reports frame rates of several hundred FPS in Gnome
+ Classic. See comments #28-#30.
+
+ In other cases, game performance is OK but still visibly worse under
+ Unity. ioquake3 drops in frame rate by around 20% in Unity compared to
+ plain Compiz in Gnome Classic (see duplicate bug 1005074).
+
+ ORIGINAL DESCRIPTION:
+ On my Z600, with a fresh Precise installation, after installing the NVIDIA
driver 295.40 (same version as in gPrecise), glxgears runs extremely slowly
full-screen. When running on Precise, Chrome's GPU accelerated rendering path
produces correct results, albeit extremely slowly.
** Also affects: unity (Ubuntu)
Importance: Undecided
Status: New
** Changed in: unity (Ubuntu)
Status: New => In Progress
** Changed in: unity (Ubuntu)
Assignee: (unassigned) => Daniel van Vugt (vanvugt)
** Also affects: unity
Importance: Undecided
Status: New
** Changed in: unity
Status: New => Incomplete
** Changed in: unity
Status: Incomplete => In Progress
** Changed in: unity
Importance: Undecided => High
** Changed in: unity
Assignee: (unassigned) => Daniel van Vugt (vanvugt)
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https://bugs.launchpad.net/bugs/988079
Title:
Much slower OpenGL frame rates with unityshell loaded, than plain
compiz
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