An update: we tried upgrading the graphics card in the affected
workstation from a Quadro FX 380 to a Quadro 600. This worked around the
performance problems. With the new card, glmark2 runs smoothly within
Unity, and Chrome runs well; it claims 60 FPS with the WebGL Aquarium
demo running nearly
@Kenneth: when you say gnome-shell and compiz, do you really mean
gnome-shell or do you mean gnome-classic (i.e gnome-panel), they are
different session, gnome-shell is not using compiz (and not sure it
can work with it since some of their feature are integrated in their
windows manager)
I
** Attachment added: glxinfo from affected machine
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/988079/+attachment/3178543/+files/glxinfo.txt
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** Attachment added: First few scenes from glmark2 run under GNOME Classic (No
Effects)
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/988079/+attachment/3178544/+files/glmark2-gnome-classic-no-effects.txt
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** Attachment added: First few scenes from glmark2 run under GNOME Classic
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/988079/+attachment/3178545/+files/glmark2-gnome-classic.txt
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** Attachment added: First few scenes from glmark2 run under GNOME Classic
with Force full screen redraws enabled in CCSM
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/988079/+attachment/3178546/+files/glmark2-gnome-classic-ccsm-full-screen-redraw.txt
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** Attachment added: First few scenes from glmark2 run under Unity
https://bugs.launchpad.net/ubuntu/+source/compiz/+bug/988079/+attachment/3178547/+files/glmark2-unity.txt
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glxinfo output attached.
xrandr was reporting a 50 Hz refresh rate. I disabled Detect Refresh
Rate in CCSM - Composite, forced the refresh rate to 60 Hz, logged
out, logged back in, confirmed the settings stuck, and re-tested
glxgears and glmark2. No significant difference.
I installed glmark2
While I agree that Unity is the largest problem, I do not agree that it
is the only problem. Compiz is definitely imposing overhead, and causing
incorrect reporting of OpenGL applications' performance. With gnome-
shell+compiz, glmark2 thinks it is running at 170 FPS, but it is
definitely dropping
Sam,
I re-verified that Sync to VBlank was set in nvidia-settings and the
OpenGL panel of CCSM, and that Force full screen redraws was set in
the Workarounds panel of CCSM.
glxgears claims to be synced to the vertical refresh, and doesn't claim
to be running faster than 60 FPS. However, when
With the Unity WM, I enabled Sync to VBlank in nvidia-settings, logged
out and back in, and made sure the setting stuck.
I then opened CCSM, made sure Sync To VBlank was set in the OpenGL
section and that Force full screen redraws was set in the Workarounds
section, and logged out and back in
Hi Daniel,
Here are the results:
1. Enable both:
Workarounds Force full screen redraws (buffer swap) on repaint
OpenGL Sync To VBlank (it should be enabled already)
Result: WebGL Aquarium runs (i.e., desktop doesn't lock up), but at ~2
FPS
2. Disable both:
Workarounds Force full
Sebastien: yes, GNOME=gnome-shell. The three desktops I listed above are
the names of the login menu options.
unity-2d is currently broken in our modified Precise distribution so I
haven't been able to test with it.
The problem is not isolated to Unity. The new gnome-shell desktop with
all of
The problem appears to be caused by the window manager or compositor. On
request from NVIDIA, I disabled the window manager on the affected
machine and ran a raw X server:
sudo service lightdm stop
sudo Xorg
xlogo
and then ran glxgears full-screen:
glxgears -geometry 2400x1900+10+10
This
Installed GNOME. GNOME Classic without effects runs Chrome properly.
Details:
GNOME: fails to run WebGL Aquarium
GNOME Classic: runs WebGL Aquarium at 20 FPS full-screen
GNOME Classic (No effects): runs WebGL Aquarium at 30 FPS full-screen (this
appears to be the maximum this card supports at
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