On 06/04/2012 03:01 PM, Jussi Silvennoinen wrote:
> > > > three. It's the configuration I am running right now.
> > > > I wound up going with the ATI FirePro v4900 for triple head on
> > RHEL6.
> > > I am using the DVI port, and two DisplayPort to DVI cables to
drive
> > > three monitors.
> > > > An interesting note... The AMD binary driver locked up the >
> > > machine.
> > > Using the native RHEL driver, all three screens work, and I get
> > > accelerated X and compiz works great.
> > > > Out of curiosity, what kind of performance do you get? In
something
> > rudimentary like glxgears.
> > Sorry for the delay in answering, I was travelling all week. It's
not
> spectacular, but certainly usable for my purposes. Like I said, I am
> not a gamer, all I wanted was compiz to work on three heads. I just
got:
> > [tcameron@case ~]$ glxgears
> Running synchronized to the vertical refresh. The framerate should be
> approximately the same as the monitor refresh rate.
> 298 frames in 5.0 seconds = 59.561 FPS
> 300 frames in 5.0 seconds = 59.903 FPS
Hum, how about 'export vblank_mode=0 ; glxgears'? Gaming aside, 2500fps
from a Nvidia NVS290 wasn't enough to run compiz on a 3200x1200 dualhead
smoothly enóugh for my taste. 9000fps from a Quadro 600 did the trick.
Both using Nvidia's proprietary driver.
I'm running at 4320x900, or one desktop across three 1440x900 screens.
Compiz works just fine to my eye.
To use the Quadro 600 for three monitors, I would have had to buy two
of them, instead of the one V4900. Essentially that would double my
cost, and add the hassle of proprietary drivers. Also, I MASSIVELY
prefer to use OSS instead of closed source.
Anyway, I ran your command, and I got an average of about 4000fps.
Plenty snappy for my use.
[tcameron@case Desktop]$ export vblank_mode=0 ; glxgears
ATTENTION: default value of option vblank_mode overridden by environment.
ATTENTION: default value of option vblank_mode overridden by environment.
17754 frames in 5.0 seconds = 3550.749 FPS
17699 frames in 5.0 seconds = 3539.472 FPS
Wonderful. Do you use xinerama?
I cannot get xinerama to work properly with any newish Nvidia driver and
RHEL6.2's X.org, window borders go AWOL.
Weird, I used Xinerama all the time with my GeForce 7300 GT in dual-head
mode, and never had an issue with my borders. Same now that it's the
v4900... No issues at all.
--
Thomas Cameron, RHCA, RHCSS, RHCDS, RHCVA, RHCX
Chief Architect, Canada and Central US
512-241-0774 office / 512-585-5631 cell
http://people.redhat.com/tcameron/
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