According to this thread on Apple's PMG5 forums, people who have purchased a late 2004 single 1.8GHz PMG5 are having problems shutting down when the display is an ADC Apple Cinema display..

The problem happens as thus:

You shutdown from the Finder... your apps quit, your account is logged off, your desktop fades to blue with the rotating gear, your hard disks and fans spin down, but both the display and the PMG5 are still on.

The only way to shut it off at this point is to press and hold the power button or unplug the power cord to the G5.

This has happened to many people who all had the same G5 model and an ADC cinema display in that thread, including myself.

The current hypothesis is, the late 2004 SP 1.8GHz PMG5 has only a 350W PSU. The draw of power from the ADC Cinema Display must be too much for the system to manage during the shutdown state.

The current solution I've found is to use Apple's ~$90 ADC-to-DVI adapter box to essentially power the Cinema Display so your PMG5's PSU can focus on other items.

I didn't find this issue mentioned on G5 Support, so I figured I'd stop lurking and contribute.

I hope this helps someone out there.

I thought that converter was for people w/ dvi monitors to plug into adc video cards… I didn’t think the normal dvi port on a vid card would provide the power needed for adc monitors… you’ve tried this and it works?

They could be using the older ADC cards like the ATI 9600 or 9800 or Pro SE etc. which are still in major circulation. Even the new ATI X800 is Dual DVI/ADC.

DVI can hook to Dual DVI just fine.

ADC carries power, DVI and USB combined. A ADC video card carries all this.

So if one has a ADC display with a ADC video card they just hook it up.

Apple now sells video monitors and video cards with DVI/DVI (and for the 30" Dual DVI/Dual DVI)

Apple and Dr. Bott both sell a device that will take a DVI signal, add power from a brick, USB from a port and sent it to a ADC only monitor.

Apple also sells a adapter to put on a a ADC video card to block the power and USB, allowing only the DVI to come through. A ADC to DVI adapter.

So a combination of the devices will allow one to power their ADC display from a floor brick instead of from the ADC video card/PowerMac power supply thus alleviating the problem.

Interesting issues. I have an old Sony monitor, plugged into a Belkin USB KVM, which I share with my PC. The kvm is self-powered; I have the apple keyboard and MS mouse plugged directly into the G5. Maybe 1 out of 3 times I shutdown, the shutdown ends on the blue screen. Shutting it down with the power switch and restarting never seems to cause any permission or other disk problems.

Since I'm only using the PC as a backup machine for now, I think I'll connect the monitor directly to the G5, and see what happens. The KVM (which was allegedly designed for Mac's and PC's) did cause a bit of trouble with the keyboard / mouse sharing.

Well, connecting the monitor directly to the G5 had no effect; nor did unmounting and powering off my external firewire drive before trying to shut down. I do notice a message in the system log at these time that the system has halted, so I suspect that the OS has shut down, but just can't power off the computer. This all seems related to the many reported problems with sleeping the G5's; I could never get it to not hang, and ended up turning off the sleep option.

This is what warranties are for.

Is this the sort of issue a Power Management Unit reset might address?

Otherwise, with all of these issues, and the sleep issues, it does sound like a firmware problem. In the PC world, BIOS upgrades often address these issues.

I had exactly the same problem here : Single 1.8 Ghz received about 2 weeks ago. Randomly, it does not shutdown (the screen fades in blue, the wheel keeps spinning...).

In my case, I don't have an Apple Display ! Just an old CRT monitor that I used with my old PC...

same thing.. i dont use an adc monitor, but i still get these problems.. i dont think its the monitor, but i do think its a power issue.

>You shutdown from the Finder... your apps quit, your account is logged off, your desktop fades to blue with the rotating gear, your hard disks and fans spin down, but both the display and the PMG5 are still on.

up to here I sometimes have the same symptoms. But I have an CRT monitor, not from Apple). And there is no spinning wheel (as it was always with my G3 computers).

>The only way to shut it off at this point is to press and hold the power button or unplug the power cord to the G5.

Here I have to wait some minutes, finally the computer shuts down.


>This has happened to many people who all had the same G5 model and an ADC cinema display in that thread, including myself.

Yes, I also have this "cheap" G5 (G5 1.8 RevB), but - as I mentioned - a CRT.

yes i have just bought a G5 1.8 SP and the thing wont shut down at all....it's quite ridiculous....i could have upgraded my G4 to a dual 1.3 and filled it up with ram and still had change and would have been able to turn it off.....i'm not impressed....i don't have a fancy screen and i just don't know what to do....thoughts anyone?? so much technology and yet so sort of lame....

A note which I should probably post on the huge shutdown thread on the Apple PowerMac discussion forums:

I've found that if I manually unmount my external firewire drive (Maxtor 160 in a MacAlly enclosure) before shutting down, my G5 shuts down right away 100% of the time. If I leave it mounted, the shutdown process unmounts it right away, but the G5 might shut down immediately, or it might take as long as an hour and a half. As far as I've ever been able to tell, there are no programs but Finder touching the external drive at these times. I use it only for cloning my internal drive.

This behaviour is with my Epson scanner disconnected; I have a suspicion that might cause a problem too.

I have another firewire drive, connected to my XP SP2 PC. That box always shuts down promptly. The two machines are connected via my little internal network, but no other PC in the house accesses the G5's drives on a regular basis.

If I had thought of this before, it would have saved me a bit of annoyance.

I have the same shut down problem with my apple supplied refurb G5 using a Formac monitor - I don't think in my case it's anything to do with monitors - what's actually happening is that the Finder is freezing - you wouldn't even notice it had happened unless you quit all your applications before shutting down - Basically it behaves itself for an hour or so and then sooner or later the finder locks up - all applications continue to work fine but when you come to shut down- hey presto - the problem of the spinning beachball in the finder delivers a failure to shut down. It's been driving me bats for several weeks - I've tried all the recommended cures to no avail

Just found this forum. Looks really interesting.

But has anyone as yet found a solution to this shut downproblem?

Sure would like to get it resolved.

Thanks

I finally solved mine by throwing away the two RAM chips Apple supplied and inserting two bigger ones as replacements - the other thing I'd recommend is to set your processor Performance to highest in Energy Saver options and to run permissions repairs after any bad shut down - or application failure - sometimes it's worth just being a bit patient too - - the spinning ball does sometimes resolve itself

What comes in the SP 1.6 of late 2004? That's what mine is and my Cinema display seems to be working fine with it, just curious.