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Author Topic: Mac Mini G4 display compatibility  (Read 8438 times)

ssp3

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Re: Mac Mini G4 + display oddities
« Reply #40 on: May 30, 2024, 05:55:40 PM »

I can confirm that it works and I can select the 1920x1200x76Ghz resolution without any screen corruption.

1920x1200@76Hz ? This is very interesting!

Please confirm that you have:

* Real Mac Mini 1.5GHz (10,2), not overclocked 1.42GHz (10,1). Check with System Profiler, to be sure.
* Working with Dell (?) display that has 1920x1200 @60Hz (?) native resolution. Or should have, I'd say.
* And it is possible to set it to 76Hz and picture displays correctly?

A screenshot would be helpful too.

Thanks.
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fergycool

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Re: Mac Mini G4 display compatibility
« Reply #41 on: June 01, 2024, 03:53:55 AM »

I can confirm that it works and I can select the 1920x1200x76Ghz resolution without any screen corruption.
1920x1200@76Hz ? This is very interesting!
Sorry but it looks like I was wrong. But what happened is a little bizarre (at least to me!).
When I clicked on the 1920x1200x76Hz resolution the screen flashed then when it came back the Control Strip had moved up. I assumed (wrongly) 120pixels had been added below it (difference between 1080 and 1200!).
However, when I rebooted (after I had posted) and checked the resolution on the monitor it still says 1920x1080. I checked the Monitor and it seems that no matter which resolution I choose it stays on 1920x1080x60hz (see screenshots). I can select 640x480 and the screen flashes and goes to 1920x1080! I guess something about DVI>HDMI>DVI is the cause.

Anyway I think I'm done with messing with getting to 1920x1200 now and I'lll stick with 1920x1080.
Thanks!
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ssp3

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Re: Mac Mini G4 display compatibility
« Reply #42 on: June 01, 2024, 04:13:33 AM »

This is also very interesting.
Are you saying that your 1920x1200 Dell display, when set to 1920x1080, istead of stretching 1080 pixels to 1200, adds 120 pixels at the bottom and as a result of this displays all icons etc. correctly?

Dell U2412M (1920x1200), for example, stretches everything and is unusable.
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fergycool

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Re: Mac Mini G4 display compatibility
« Reply #43 on: June 01, 2024, 08:48:55 AM »

This is also very interesting.
Are you saying that your 1920x1200 Dell display, when set to 1920x1080, istead of stretching 1080 pixels to 1200, adds 120 pixels at the bottom and as a result of this displays all icons etc. correctly?

Dell U2412M (1920x1200), for example, stretches everything and is unusable.
I'd not thought about it before, but everything certainly looks fine and not stretched. You can see in the screenshot in my previous post.
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ssp3

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Odd behaviour of both ATI drivers with Fujitsu display
« Reply #44 on: June 04, 2024, 02:36:24 AM »

Tested another nice looking display today with both kind of Minis.

Fujitsu 22" B22W-6 LED

Native display resolution - 1680 x 1050 @60Hz (16:10)
TN type panel.
LED backlight.
VGA + DVI + Display Port inputs.
v8 ROM

1. DVI to VGA, ATI RockHopper2 Driver, both models - black screen.

2. DVI to VGA, ATI Via Driver, both models - max resolution, acceleration works.
Display is recognized correctly as B22W-6 LED





3. DVI to DVI, ATI Via Driver, both models. This is very strange!
Native resolution is displayed in Monitors control panel, but you either can not select it (I forgot which model it was), or, if you select it, you get garbled display.
If you select some other resolution, the display gets stretched.






4. DVI to DVI, ATI RockHopper2 Driver, 10,2 model - native resolution is not listed!
If you select any other resolution you get either garbled or stretched display.
(The screenshot looks ok because it is a screenshot. One has to photograph the screen to see the effect).




5. DVI to DVI, ATI RockHopper2 Driver, 10,1 model - black screen.


It's worth noting that this display has the same resolution as 20" Apple Cinema Display, but it seems that, as soon as we approach 22" and larger displays, all sorts of problems start to pop up.

In OSX Leopard both Mini models work fine with this display on any port.
« Last Edit: June 04, 2024, 06:46:43 AM by ssp3 »
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Slimes

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Re: Mac Mini G4 display compatibility HOW TO GET VIDEO
« Reply #45 on: June 04, 2024, 05:55:24 PM »

I have done expensive experimentation with many monitors and adapters and so forth.
I'll keep it simple:

WHAT WORKS
DVI-I Adapter -> VGA -> VGA Monitor port
DVI-I Adapter -> VGA -> VGA to HDMI -> HDMI Monitor port or KVM port

WHAT DOESN'T WORK
DVI-D direct cable
DVI-D any adapter

NOTES
DVI-I direct cable may work.
It appears the digital pins on the DVI port on the mini are not active hence the above methods working while DVI-D does not.

HDMI Solution
BENFEI VGA to HDMI Adapter, 1080P Converter with Audio from Computer/Laptop VGA Source to HDMI TV/Monitor
www.amazon.ca/gp/product/B07K14NR8P/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1
This works great with modern monitors, even works with my 4K monitor from several G4 towers and mini. No lag.
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ssp3

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Re: Mac Mini G4 display compatibility
« Reply #46 on: June 05, 2024, 07:26:02 AM »

Samsung 20" SyncMaster 203B

Native display resolution - 1400 x 1050 @60Hz
TN type panel.
CCFL backlight.
VGA + DVI inputs.

v8 ROM, 10,1 and 10,2 Minis.

1. DVI to VGA, ATI Via Driver, both models - max resolution, acceleration works.

2. DVI to DVI, ATI Via Driver, both models - max resolution, acceleration works.

3. DVI to VGA, ATI RockHopper2 Driver, both models - black screen.

4. DVI to DVI, ATI RockHopper2 Driver, 10,1 model - black screen.

5. DVI to DVI, ATI RockHopper2 Driver, 10,2 model - native resolution is not listed!
If you select any other resolution you get either garbled display or the display complains that the signal is "not optimum" and switches itself off.
Picture below taken shortly before that moment.




6. OSX Leopard - both Mini models work fine with this display on any port.
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davecom

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Re: Mac Mini G4 display compatibility
« Reply #47 on: June 05, 2024, 11:37:28 AM »

The garbled display you're seeing is what I have also been seeing on my Dell 4K. When you install the RockHopper driver which extensions on the base v9 image are you disabling (i.e. replacing)?
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Slartibartfast

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Re: Mac Mini G4 display compatibility
« Reply #48 on: June 22, 2024, 02:44:47 AM »

Is the garbled display you're referring to by any chance missing every other vertical line?
I have a 1.5GHz 64MB VRAM G4 Mac Mini with the v9 image installed on it connected via a DVI converter (passive) to HDMI to a 1440p Philips 246B1. If put to 1920x1080p60, I only see every other vertical line, which makes it difficult but not impossible to open the Display settings. When set to 1280x960p60 (if I recall correctly), all is absolutely fine and dandy.
I'm betting on the adapter to HDMI not playing ball, but I don't have any DVI displays around... (Why did I sell my DVI to ADC adapter???) Is it wise to look for VGA to HDMI (active) or maybe look for a compatible DVI adapter? I'm hoping to keep a dual boot with Tiger or Leopard working.
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ssp3

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Re: Mac Mini G4 display compatibility
« Reply #49 on: June 22, 2024, 06:52:54 AM »

No.
Example of garbled can be seen in attachment to this post:
http://macos9lives.com/smforum/index.php?topic=7048.msg55340#msg55340
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Slartibartfast

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Re: Mac Mini G4 display compatibility
« Reply #50 on: June 22, 2024, 10:07:08 AM »

No.
Example of garbled can be seen in attachment to this post:
http://macos9lives.com/smforum/index.php?topic=7048.msg55340#msg55340

Apologies, for some reason that hadn't registered with me. I have looked at the images, and it seems to me to be the same here. The horizontal lines all seem present for what I can see, it's an issue with the vertical ones. Maybe not every other vertical line, but sets of them.

What I've noticed now is that if I use two adapters (Mac Mini DVI > DVI/VGA Splitter > DVI/HDMI Converter) I get the garbled display. Just the converter, I get no display. Must be some part in that splitter then which the converter likes. I'll see if I can find some different adapters (passive and/or active) to test.
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