ubuntu-x-swat team mailing list archive

[DervishD <raul@xxxxxxxxxxxx>]

Public bug reported:

Binary package hint: xserver-xorg-video-intel

I know, glxgears is not a benchmark, but to me is strange that glxgears
runs at 1160 but using "Desktop wall", "Ring switcher" or "Desktop cube"
is intolerably slow as soon as more than three windows are on the
screen, specially when the plugin is started . For example, if I use the
Ring or Flip switchers, the first time the animation is jerky, VERY
jerky, and smooths a bit after that, but not much. Desktop wall is
almost unusable due to the jerkiness of the animation if the window
previews are active.

On the other hand, video works OK. Well, it flickers due to another
known problem with Intel cards, but compiz not only flickers, it is
jerky too.

This happens in an Acer Aspire 5735 laptop with 4GB of RAM and a T5800
CPU, using Jaunty amd64.

I would say that the problem is that the video card uses shared memory,
but currently 256M are assigned:

~$ sudo lspci -v -s 00:02.0
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)
	Subsystem: Acer Incorporated [ALI] Device 0176
	Flags: bus master, fast devsel, latency 0, IRQ 2295
	Memory at f8000000 (64-bit, non-prefetchable) [size=4M]
	Memory at d0000000 (64-bit, prefetchable) [size=256M]
	I/O ports at 1800 [size=8]
	Capabilities: [90] Message Signalled Interrupts: Mask- 64bit- Queue=0/0 Enable+
	Capabilities: [d0] Power Management version 3

Disabling "Sync to vblank" in compiz configuration doesn't help, and I
don't dare tweaking with driconf, at least as the first resort.

Is there anything I can tweak or test to improve compiz performance?
Currently I'm just disabling as many effects as possible.

ProblemType: Bug
Architecture: amd64
DistroRelease: Ubuntu 9.04
Package: xserver-xorg-video-intel 2:2.6.3-0ubuntu9.3
ProcVersion: Linux version 2.6.28-16-generic (buildd@crested) (gcc version 4.3.3 (Ubuntu 4.3.3-5ubuntu4) ) #55-Ubuntu SMP Tue Oct 20 19:48:32 UTC 2009
SourcePackage: xserver-xorg-video-intel
Uname: Linux 2.6.28-16-generic x86_64

** Affects: xserver-xorg-video-intel (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug

-- 
[GM45] Compiz is sluggish but glxgears runs at 1160 fps
https://bugs.launchpad.net/bugs/461044
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