** Also affects: ubutter
Importance: Undecided
Status: New
** Changed in: ubutter
Status: New => Fix Released
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https://bugs.launchpad.net/bugs/988079
Title:
Much slower OpenGL frame rates with unityshell loaded, than plain
compiz
Status in Ubutter: Making Ubuntu buttery smooth:
Fix Released
Status in Unity:
Fix Released
Status in Unity 5.0 series:
Triaged
Status in “unity” package in Ubuntu:
Fix Released
Status in “unity” source package in Precise:
Confirmed
Bug description:
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.
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