Jack Luminous wrote: I was looking at the Philips Brilliance 298P4QJEB/00, 21/9 ratio with "multiview" functionality (basically two different video sources on screen side-by-side).
I have no experience at all with the DCD. Bought one last year and haven't connected it yet. Does the above sound like a feasible plan ?
What could go wrong ?
hamei wrote:What could go wrong ?
This is computing. Everything
hamei wrote:Otherwise, it's good. With a DCD you will get a parting line down the middle of the screen if you drag a window through it. That's because the dcd refreshes one half at a time, too fast to be seen but if you move something through it, you can see an edge. It's not really annoying.
I believe Mia is also running one of these, maybe he can chime in here about whether he has the same situation.
Not sure you can run 1280 x 1080 @ 70 though. You don't need 70, whatever is the lowest refresh the panel will sync will be fine. These are not crt's. Unless you are playing games, you cannot tell if the monitor is running at even 31 herz refresh. Even with movies.
hamei wrote:That's a pretty neat monitor. They should be curved, then you could watch Cinerama Holiday (if you don't mind an hour's worth of sailing ships making six knots. The tobaggan run was fun though.)What could go wrong ?
This is computing. Everything
jan-jaap wrote:I like the concept But not the 21:9 aspect ratio (and lack of vertical resolution) of this screen which is nice for films but not much else IMHO.
But there's this one: http://www.p4c.philips.com/cgi-bin/cpin ... 4QPJKEB/00 : a 27" 2560 x 1440 display, 16;9 aspect ratio. With MultiView capability. Oh, and since these monitors have dual HDMI ports, why not get a pair of DVI-HDMI cables and forget about a DP converter?
jan-jaap wrote:I wonder a bit how this works in the real world. Like, for example, will the monitor 'remember' to power up in PbP (picture-beside-picure?) mode or do you have to go into the on screen menus every time? That would tire quickly.
jan-jaap wrote:Also, there's no analog input *at all*. You could add a (pair of) VGA-to-DVI-D converters but I wonder how those things deal with oddball resolutions like 1280x1440.
Jack Luminous wrote:That's exactly what kinda worries me. From the monitor's manual :
Vertical refresh rate : 56 Hz - 75 Hz
Horizontal freq : 30 kHz - 90 kHz
It's not clear to me what is the exact vertical refresh rate outputted by the DCD with the 2@ res at each DVI output. It is the stated rate divided by two ? It is outputting twice the same image on one output at the normal rate ? Is it alternating both image at the nominal rate ? Etc...
I fear the monitor won't be able to sync properly if the DCD refresh rate is too low.
hamei wrote:res here is 2@1920x2400_31. The monitor reports 3840 x 2400 @ 31 Hz. So I am guessing that the VPro feeds the DCD at 62 hz, then the DCD splits it into two channels of half-speed. But the resolution and refresh you get is what you compile in, not half that. What limits what you can display is the limits of DVI, not the VPro - DCD circuitry.
But that's just a guess from observing the way the screen displays.
You're going to have to get recondas in on this - he's the Master of 2@ Video Resolutions.I fear the monitor won't be able to sync properly if the DCD refresh rate is too low.
Jack Luminous wrote:[There's a screenshot in the SGI DCD manual
recondas wrote:Nice monitor, but unless use with your Octane will be a secondary function I wouldn't recommend purchasing it without a liberal return policy.
Yours is the first mention of using connecting a monitor with a Display Port that I can recall. You'll have to decide if you want to assume the risk of being first.
recondas wrote:Potential pitfalls go beyond the Display Port conversion. The less risky method is to use a monitor someone else has reported working. There have been several mentions here of IRIX display formats that wouldn't work with one particular monitor when the same IRIX display format had previously worked other brands/models with the same native resolution and similar display requirements. I think it's possible some of the monitors (that couldn't be made to work correctly with IRIX) use a version of DDC / EDID released after IRIX became dormant.
recondas wrote:Last but not least, display formats for DCD-equipped VPro graphics adapters are notoriously hard to compile.
recondas wrote:I don't how (or even if) the above will apply to the Philips Brilliance 298P4QJEB/00, but it's not totally gloom-n-doom. If everything mentioned above works in your favor, a 2@1280x1080 display is within the capabilities of a DCD-equipped V12:
- A generic 1280x1080@60Hz mode line has a pixel clock of roughly 115MHz, comfortably with in the V12's 165MHz single-link DVI ceiling (2@ formats used by the VPro DCD typically increase the pixel clock by only a few megahertz);
- Your intended 2@1280x1080_60 format meets the compiler requirement that the horizontal aspect be a multiple of 64.
Indeed he did (I'll plead short-term memory loss ) - that's one potential pitfall out of the way.Jack Luminous wrote:Canavan reported previously that he used such adapter with success, connecting a Fuel with a Eizo S2243.
Be happy to offer help if needed, just didn't want give the impression that getting the monitor to work was a foregone conclusion.Jack Luminous wrote:I kinda counted on your help about that, just in case I can't manage it myself....
I've mentioned the x64 rule before, but not so long ago a member requesting I assist with creating a 2@ format. He wanted to connect a second 1440x900 panel he'd purchased for use with his equally new DCD. Understandably he was less than happy with the outcome......Jack Luminous wrote:That's good to know... Thanks a lot for the infos.
recondas wrote:I've mentioned the x64 rule before
Thankfully just the ActivePixelsPerLine / horizontal display resolution. Otherwise a lot of common resolutions like 2@1600x1200, 2@1920x1080 and less common stuff like Jack's goal of 2@1280x1080 wouldn't be possible.jan-jaap wrote:Does this apply to vertical resolution as well, or just ActivePixelsPerLine ? In that case the 2560 x 1440 display display I mentioned is out the window...
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