[rhelv6-list] Opinions on multi-head

[Jussi Silvennoinen]

>> > > > >  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 at 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 at 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.


-- 

   Jussi