Yasu,
Quote:
Whats the common part ? did you use the same cable ? did you use the same gfx card ?
try using a different cable, see if there is a bendet pin, use a cable tester. (Multimeter)

Quote:

Whats between your mac and the computer screen (what kind of adapters)
You need a direct connection to reduce the posibilities for a fault.
There seems to be something weird, because it does work on Ubuntu and not on MacOS.

With VGA cable it should be pin 11 (afaik) try to bend it a little bit to get better connection
to the connector.

@defender

The common part is that I used the same monitor and the same cable(s) and VGA adaptors. The gfx card is also more or less the same (9600).

And when I use the same VGA cable on my Windows machine, I have no problems at all. Of course, my PC doesn't use a VGA adaptor.

So you've tried 2 different monitors over VGA and it seems bothe failed at DCC.

Does none of these monitors have a direct DVI connector ? If not they must be quite old....

@Kronos

They are. With my monitor Ubuntu PPC doesn't find any screen, but with my friends monitor it does, and it does show the correct screen mode. But not with MorphOS.

Good news! I've tried with my dad's old LG Flattron L192WS monitor and now MorphOS shows the correct screen again. I've used his VGA cable so I'm still not sure if it's the monitor that's broker or the cable, but I'm understandably not too keen to try it out with my maybe broken monitor in case something breaks again.

However, my Efika still shows the wrong screen so I have too check there. It might be because it uses MOS 3.3 and my G5 3,4. I don't know about that so maybe someone else does.

But this is a very good step forward after weeks of frustration! Maybe I can hope again

If those screens have the same resolution (say 1280x1024) you can trick MorphOS by renaming/copying the working monitors file in prefs/presets/monitors to the name generated for the non-working one.

Either that or open Prefs->System->Monitors and select one of the predefined monitors close to your specs.

I would, first of all exchange the cable. Thats cheap and most likely the reason for the fault.
After this I would try updating your Efika ppc to Mos3.4

greets

@Kronos

I did try that, but it didn't work. And there was no predefined monitor that fitted.

@defender

I did try exchanging the cable for the working one. When I used it in the non-working monitor I had the same problem as before. But when I changed it back, the new screen still worked. This means, it's something wrong with the monitor and I need to get a new one.

It took weeks of total frustration, but finally everything works! I have reinstalled MorphOS and used my backups to get my system back as it was before and it's now rocking! The only problem right now is lack of space for 2 monitors, but I gladly have this problem instead of unusable computers

Congratulations Yasu. :)

@Intuition

Thanks! I was just about to give up the whole MorphOS thing over this. I'm glad I found a solution. Less glad that it costed me another gfx card and a new G5, but glad nevertheless

Okey, so today I properly installed everything. Now I got 2 G5 with MorphOS installed and they work just fine with my new (old) temporary monitor. I'm a happy camper! My plan is to compare the two computers and see if I can downgrade to the 2 GHz version so I don't have to worry about the liquid cooling anymore.

However, the Efika 5200b (that I really don't use) refure to work. I reinstalled MorphOS to 3.4 with no effect. And when I look at prefs/presets/monitors my monitor isn't there, just like with the old monitor. It recognice only the standard 31 KHz monitor and the settings are wierd.

So my guess here is that something is twitching up the firmware. If so, what can I do to reset it?

Okey, the story hasn't ended yet. Today my new 24" Dell monitor arrived. Works fine with Windows of course via VGA. But when I tried with my MorphOS machine, the old problem came back. And to make matters worse, the monitor I have been using so far now had the same problem as well.

After some standard trying of changing settings, using the install CD, switching gfx cards between my 2 G5 machines I decided to try the DVI --> DVI cable that came with the monitor. Suddenly, it worked with my newer G5 (with a 9600 Pro 256 MB) perfectly, but not with the older G5. To make matters worse, suddenly it didn't show any screens at all. Just a big, gray screen on both my monitors.

The solution: changing the gfx card from my spare G5 system (with the better gfx card) with the system I use + using DVI --> DVI instead of VGA --> DVI adapter (remember that DVI --> HDMI broke it in the first place). Now everything works beautifully! I have no idea what has broken, but I suspect that the old gfx card indeed got a static shock and it passed through the VGA-adaptor and the computer screen, making everything less stable. Doesn't explain why it works with Windows though.

Anyway, Now I got a nice, working monitor for both my computer systems and I don't have to settle for "working well enough" anymore. Like I said, I don't know why everything acted up the way it did, but after several hours of hard work and dispair, I'm glad it works again.

If some developer whats to look at the card and see if he/she can learn anything from it I will ship it for free.

[ Edited by Yasu 27.01.2014 - 18:53 ]