[rhelv6-list] Opinions on multi-head

thomas at redhat.com thomas at redhat.com
Sat Jun 2 16:38:52 UTC 2012

On 05/31/2012 12:43 AM, Jussi Silvennoinen wrote:
>>> > As far as I know, ATI cards can only drive more than two displays if
>>> > you're using pure DisplayPort protocol. Using passive DP->DVI adapters
>>> > you can only drive two monitors.
>>> ATI cards (in my case a 5770) are fine driving one monitor via an active
>>> DisplayPort->DVI adapter and two more by DVI directly for a total of
>>> 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

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