** Changed in: ubutter
Status: Fix Committed = Fix Released
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https://bugs.launchpad.net/bugs/1004251
Title:
Animations aren't smooth when sync to vblank is
This bug was fixed in the package compiz - 1:0.9.8.0-0ubuntu1
---
compiz (1:0.9.8.0-0ubuntu1) quantal-proposed; urgency=low
* debian/control, debian/rules:
- enable gles on armel and armhf
- use dh-translations rather than custom code
[ Sam Spilsbury ]
* Enable OpenGL
** Changed in: compiz
Status: Fix Committed = Fix Released
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https://bugs.launchpad.net/bugs/1004251
Title:
Animations aren't smooth when sync to vblank is enabled
Fix committed into lp:compiz at revision 3320
** Changed in: compiz
Status: In Progress = Fix Committed
** Changed in: ubutter
Status: In Progress = Fix Committed
** No longer affects: unity
** No longer affects: unity (Ubuntu)
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** Also affects: ubutter
Importance: Undecided
Status: New
** Changed in: ubutter
Status: New = Confirmed
** Branch linked: lp:~compiz-linaro-team/compiz/gles2
** Changed in: compiz
Assignee: Daniel van Vugt (vanvugt) = Compiz Linaro Team
(compiz-linaro-team)
** Changed
** Description changed:
- WORKAROUND:
+ WORKAROUND (PREFERRED):
1. Run ccsm
2. Go to Workarounds
3. Enable Force full screen redraws (buffer swap) on repaint
+
+ WORKAROUND (RELIABLE):
+ 1. Run ccsm
+ 2. Go to OpenGL
+ 3. Disable Sync To VBlank
ORIGINAL DESCRIPTION:
When Sync to
Maybe this is of interest for you.
I have noticed that suddenly compiz/unity is much smoother. My observation is
not about FPS but more about how frequent the frames make it on screen. Video
playback in xbmc is much smoother with 25FPS (monitor at 50Hz).
In the past I had every few seconds
Achim: you appear to be using the Ubuntu-X team ppa
(https://launchpad.net/~ubuntu-x-swat/+archive/x-updates), so you have
the 2.19 version of the intel driver instead of the 2.17 that comes with
precise. Also, you are using a newer kernel, with improved DRM code.
I, too, have this ppa enabled
Daniel, I tried the FPS counter, but I think there is something wrong
with it. It oscillates between 5 and 30 fps, most of the time staying
close to the low 10's even if the desktop is smooth.
For know I will re-enable sync to vblank with your workaround and test
it in the day to day usage. I
Nicolás, it is correct for the compiz frame rate to be low when the
desktop is not too busy. And even zero when idle. It's designed to only
render frames when something is changing.
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Daniel, I tried your workaround. It appears to work, approximately the
same as disabling sync to vblank, but I am not completely sure. It is
not easy to measure smoothness. Is there a way to quantify the
smoothness of the animations (something like a fps counter for example)?
However, even if it
Daniel, thanks for your answer.
I'll try the FPS counter when I have access to my Ubuntu laptop.
There is something I still don't fully understand though. Apparently, my
graphics drivers (Intel Ironhide) forces sync to vblank because, even
with it disabled in CCSM, glxgears maxes out at 60fps
Nicolás, there is a direct relationship between the application
(glxgears) and the driver too. So the application gets throttled by the
driver at 60Hz. And it *might* closely match the monitor vblank timing.
However in the end, compiz is responsible for rendering everything on
the screen. So you
Nicolás,
Yes, there is an FPS counter in the Benchmark plugin, which is part of package:
compiz-plugins-extra
Just install that package. Though you might need to change the key combination
for it (ccsm) before you can get it to appear.
The advantage of the workaround is that it uses a
This sounds like a regression of bug 930192. That bug is still fixed,
but overall rendering performance in Ubuntu 12.04 has regressed still
when using Unity. I believe this is a problem with the unityshell plugin
because performance becomes fast again if I (briefly) disable Unity.
In the mean
I think I forgot to mention, this bug would be totally fixed by a fix
for bug 901097, which I hope we will complete before 12.10.
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