I can confirm the problem with the same graphics hardware. Extract from
lspci output:
00:02.0 VGA compatible controller: Intel Corporation 82Q35 Express
Integrated Graphics Controller (rev 02)
glxgears -fullscreen gives me 34 frames in 5.0 seconds = 6.773 FPS
glxgears (no fullscreen): 118 frames in 5.0 seconds = 23.595 FPS
The GUI is generally very sluggish, especially for any operation
involving 3D effects, e.g. the HUD, using the 3D windows switcher etc.
However, even in the GDM welcome screen, it takes a couple of seconds to
render the background image.
** Changed in: xserver-xorg-video-intel (Ubuntu)
Status: Incomplete => Confirmed
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https://bugs.launchpad.net/bugs/931122
Title:
3D performance is very bad
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