Hi Arnt,
Nouveau was installed by default when I installed 11.4 on the laptop, but gave
serious performance issues so I blacklisted it and installed the nvidia driver
(as I intended to). Kwin fx is the real performance killer - without that I
typically get >15fps, but with the minimum fps suffers down around 8-10.
kwin's compositing needs a total rewrite IMHO - it kills performance in OpenGL
apps like fg - as an example on my GTX560Ti glxgears consistently runs 16700
fps with effects off, but as soon as you turn them on it drops to around 5000
fps and is not as consistent - KDE devs have a sad habit of blaming nvidia's
binary blob, but I've seen plenty of evidence that people with ATI hardware,
and also intel hardware, also suffer the same performance problems as well -
kwin is the problem, not the proprietary drivers. My GTX560Ti can chew thru
Crysis/Crysis 2 at 2560x1440 at >30fps on max settings - there is *no* way some
lightweight desktop effects should hit it that badly...
Regards,
Chris Wilkinson, YBBN/BNE.
________________________________
From: Arnt Karlsen <a...@c2i.net>
To: flightgear-users@lists.sourceforge.net
Cc: Chris Wilkinson <blobster...@yahoo.com.au>
Sent: Friday, 3 June 2011 10:51 PM
Subject: ..ati and nvdiea performance, was: FGFS
On Wed, 1 Jun 2011 15:42:29 -0700 (PDT), Chris wrote in message
<682968.95714...@web161611.mail.bf1.yahoo.com>:
> Hi Donn,
>
>
> I'm running openSUSE 11.4 x64 and have a few days old GIT version of
> fg as well as fgdata - few minor bugs when I run fg (missing hud
> features, cannot manually set visibility distance with Z/z) but not
> like you describe. I can tell you that KDE4 kwin does not play nice
> with OpenGL apps, although usually it just causes jerky or slow
> performance in those apps (not
missing stuff).
>
> Depending on your hardware you might want to try disabling or
> suspending Kwin desktop effects before running fg. My laptop is a
> Dell with 1920x1200 panel and GeForce 8600M GT - to get good
> fullscreen performance I *have* to disable kwin fx.
..hum. My laptop also has a
1920x1200 panel, but with ATI's
M56GL [Mobility FireGL V5200] on Intel's 945GM/PM/GMS, 943/940GML
and 945GT Express PCI Express Root Port (rev 03) and Intel's
Core2 T7200, running KDE-4.6.3-1 on xorg1:7.6+6 on radeon1:6.14.2-1
from Debian Sid+Experimental, I just add --full-screen and fly.
..running FG windowed, cuts the framerate by about half,
but FG remains flyable at 3 to 5fps, full screen is 8-20.
..are you Chris getting similar performance?
Have you tried X.org's nouveau driver?
--
..med vennlig hilsen = with Kind Regards from Arnt Karlsen
...with a number of polar bear hunters in his ancestry...
Scenarios always come in sets of three:
best case, worst case, and just in case.
------------------------------------------------------------------------------
Simplify data backup and recovery for your virtual environment with vRanger.
Installation's a snap, and flexible recovery options mean your data is safe,
secure and there when you need it. Discover what all the cheering's about.
Get your free trial download today.
http://p.sf.net/sfu/quest-dev2dev2
_______________________________________________
Flightgear-users mailing list
Flightgear-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/flightgear-users
