Author Topic: Someone tried OS/2 with 3840x2160 Display?  (Read 1061 times)

Andi B.

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Someone tried OS/2 with 3840x2160 Display?
« on: April 03, 2020, 08:25:04 pm »
Until a few months ago I though my two 24" 1920x1200 monitors give me the maximum display size I can use with OS/2. And this only when I can use a graphic card which SNAP can drive in multi-head mode. Then I bought a used Thinkpad T540p with a 2880x1620 panel. Surprisingly this resolution works with panorama. But of course the display is much to small. Notebooks are only toys for me. For real work I need more than 24".

Now I've the opportunity to lend a 27" Eizo with 2560x1440 resolution. As the motherboard on one of my systems does have a DisplayPort I tested this monitor with OS/2 and it works. Now as I know that Intel processor integrated graphic chip can drive more than 1920x1200 via DP I wonder if it would be possible to drive even bigger displays. The motherboard specification says max. resolution 4096 x 2160 @ 24 Hz / 3840 x 2160 @ 60 Hz. Now I wonder if something like the DELL P4317Q Ultra HD IPS 42,5" which can do 3840x2160 will work with this board. Anyone tested such high resolutions with any motherboard?

Neil Waldhauer

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Re: Someone tried OS/2 with 3840x2160 Display?
« Reply #1 on: April 04, 2020, 04:57:38 pm »
I haven't tested, but this is an Intel system like you describe. Based on the hardware documentation, we ought to be able to see resolutions up to 4096 x 2304. Panorama works well on this system.

http://www.blondeguy.com/computer/humbopeep.html

It's a Lenovo ThinkCentre M720s with a PCIe card for USB support and USB Audio device for audio support. I'm interested in testing this out. I like monitors that have good quality while still be a good value. I've been using the same Dell 24 inch for years. If I want to move to higher resolutions, what monitors should I try?
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Dariusz Piatkowski

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Re: Someone tried OS/2 with 3840x2160 Display?
« Reply #2 on: April 04, 2020, 05:26:35 pm »
Hi Andi,

I'm thinking that in a SNAP driver configuration this would be entirely driven by what resolution the video chipset supports, provided of course that the monitor can do that resoluiton. Therefore, in your case I would think that should work.

Now, I am still getting my kicks out of finally having a working 1920x1200 dual-head setup here. The 6-bit panel on the Dell U2412M (LG panel actually) plain sucks over VGA connector (the 2nd display is VGA connector only with SNAP on my ATI X850 XT video card) in terms of colour reproduction. There are certain shades of various colours that simply will NOT show over the VGA connector while they show just fine through DVI. I tried multiple U2412M displays, they all suck in the same way. I am attributing this to the mix of VGA signal processing and the way the 6-bit panel uses FRC (Frame Rate Control) to fake the equivalent of 8-bit panel capability in order to give you the 16.7 million colours. Anyways, I digress, different topic altogether.

So look, I've got a Samsung S32D850T here that's hooked up to the kid's PC. That's a WQHD display which does 2560x1440 resolution, but I've never tried it on my OS/2 box.

For what its worth, if you decide to run SNAP I can certainly re-wire my setup to plug in the big 32" Samsung and see if the max of my ATI X850 XT is supported, that would be QXGA which is 2048x1536. Since the video card won't support higher resolution I won't be able to drive the bit panel with it's native resolution.

Andi B.

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Re: Someone tried OS/2 with 3840x2160 Display?
« Reply #3 on: April 04, 2020, 06:01:00 pm »
I don't think SNAP supports more than 1920x1200 for 16x10 aspect ration and 2048x1536 for 4:3. Maybe in VESA mode but pretty sure not with dedicated drivers. For now I think we've to stick with Panorama.

I've no clue which monitor would be a good choice. But for me it has to be one in the range of 95 - 110 DPI (24" 1920x1200 = 94 DPI, 27" 2560x1440 = 109 DPI). Standard fonts are big enough and readable in this DPI range for me. So the biggest display which may work for me is 42.5/43" with 3840x2160 (104 DPI). A quick search for a cheap one gave me the DELL I mentioned. I usually do not buy DELL. If I would know for sure this resolution works, I would look for Eizo, Samsung or HP and maybe Lenovo models. Usually the Eizos are to expensive for me. Number and type of interfaces are important for me too. 2 DP, 1 DVI and VGA would be nice too. The mentioned DELL does have even VGA. I don't care about HDMI or speakers or USB hubs build in or other gimmicks. But these are my preferences. I really want to know if 3840x2160 works for someone with Panorama before I buy such thing. Of course you need DisplayPort connection for that.

Eugene Gorbunoff

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Re: Someone tried OS/2 with 3840x2160 Display?
« Reply #4 on: April 04, 2020, 10:19:10 pm »
« Last Edit: April 04, 2020, 10:23:33 pm by Eugene Gorbunoff »

Dariusz Piatkowski

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Re: Someone tried OS/2 with 3840x2160 Display?
« Reply #5 on: April 05, 2020, 02:19:57 am »
Hi Eugene,

We have tested in 2018:
http://os2.guru/commentnews.php?id=2531

Nice, that's pretty awesome to know and it pretty much answers Andi's question. But you are right, yikes, talk about tiny itsy bits fonts eh?

Andi B.

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Re: Someone tried OS/2 with 3840x2160 Display?
« Reply #6 on: April 05, 2020, 11:48:06 am »
Okay seems the probability that it works for me is high. Now found the following types -
- Acer EB490QK, 48.5", 705€, 91 DPI, DP, VGA, 3xHDMI
- iiyama X4372UHSU-B1, 42.5", 524€, 103,7 DPI, 2xDPv1.2, 2xHDMI, matte/anti-glare
- HP Z43, 42.5", 767€, 103,7 DPI, DP, mDP, HDMI, anti-glare

Advantage of the Acer is it's size. With 91 DPI our usual fonts should be very good readable even a bit bigger than on the 24" 1920x1200 with 94 DPI. And VGA. But not sure if it's really anti-glare/matte.

iiyamas plus is the price.

Dariusz Piatkowski

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Re: Someone tried OS/2 with 3840x2160 Display?
« Reply #7 on: April 05, 2020, 10:46:05 pm »
Andi,

The 32" Samsung 850 I have here sure feels pretty "huge" when placed in a corner unit of a desk (L-shaped office desk setup). Honestly, I can't even imagine going to anything bigger...

If you are going to go even bigger make sure you have the room for it.

Andi B.

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Re: Someone tried OS/2 with 3840x2160 Display?
« Reply #8 on: April 15, 2020, 10:28:12 am »
Now I had a chance to test a ~32" 3840x2160 monitor. Unfortunately it did not work for me. No clue if it's cause of my old Panorama. I think I use something like 1.07. Every OS/2 installation I tried came up with standard VGA 640x480 resolution without any chance to change it to another setting. Tried PanUtil without success. Guess Panorama couldn't read or interpret EDID information correctly.

Of course the same setup worked with Win in 3840x2160.

Martin Iturbide

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Re: Someone tried OS/2 with 3840x2160 Display?
« Reply #9 on: April 16, 2020, 07:37:42 pm »
Hi Andi B.

I don't remember if you are using ArcaOS, but the latest version of the driver on AN is "panorama-1.15.exe". If you can update it , it will be good at least to know that you are at the latest level.

Can you please tell us to the motherboard model, GPU and Monitor you are using to try to get "3840x2160" ?

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Andi B.

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Re: Someone tried OS/2 with 3840x2160 Display?
« Reply #10 on: April 17, 2020, 01:35:31 pm »
All my ArcaOS subscriptions has expired since a while so I'm not on current level. I have Panorama 1.06 or 07 or something like that which worked well for systems which are not supported by SNAP until now. I've bought more than one ArcaOS license in case someone wonders.

I'm testing on my Asus H87-Pro which offers 3 digital monitor interfaces. These 3 digital interfaces where one of the main reasons I bought this board a few years ago. At that time I planned to use 2 or 3 1920x1200 monitors digitally connected to this board. Unfortunately SNAP still does not support the Haswell integrated Intel HD4600 graphic. So I've to use Panorama with this system.

Now other possibilities than MultiMonitor setups are came to mind. With a big monitor and 3840x2160 resolution (max. on this board with 60Hz) I could replace 2 of the 24" 1920x1200 monitors. Of course this only works with DisplayPort.

As the 27" Eizo runs fine with 2560x1440 resolution I was confident 3840x2160 would work to. But then I tested my sons Samsung with 3840x2160 and that did not work. I don't know if it's a problem with Panorama or maybe this is another Samsung model with crippled/wrong EDID information like one of Dariusz Samsung. Should have checked that while testing...