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Since your freeze-ups happen after an all-night rendering session, I suspect the problem may be an overheating card. Leopard offloads much more work to the GPU than Tiger ever did, so it's natural to expect that any problems with the X1900 would increase in frequency after upgrading to Leopard.

There's an interesting thread about freeze-ups (and graphics corruption) with overheating X1900's on the Apple discussion boards here:

http://discussions.apple.com/thread.jspa?threadID=1235605&tstart=0

It mentions in particular differences between X1900 revision numbers, and the suggestion to check the LED lights on the card that light up when it overheats.

In general, for Leopard + X1900 issues, you can refer to:
http://discussions.apple.com/forum.jspa?forumID=1128&start=0
 
I'm afraid not.

OS X doesn't like downgrades.

You can downgrade say from 10.4.11 to 10.4.10 by running the 10.4.10 updater.

Can't downgrade 10.5 to 10.4 though. You can try installing 10.4 on another drive, and see if you can use migration assistant (although it's unlikely that it's set up to transfer data from 10.5 -> 10.4)
 
Ok it didn't crash yesterday, came back and it was all ok.

One thing I did different was leave the networked computer on, so I am pinpointing to the network. I am not using a router, but rather a direct gigabit connection (much faster).
 
MacPRO freezes randomly running on Leopard

Hi there!

I have macs for several years.
I´ve just bought my dream machine - a Quad Core MacPRO.

Well, i see now i made a really great mistake by installing Leopard on my new machine!!!:eek:
It frozes not often but randomly letting me no other option than make a hard reset.
It was running Hardware Monitor ( latest version ) during all the incidents, so i´m going to stop using it for a while and see what happens...

At least i know, by your sad experience that this is not a specific problem with my machine.:rolleyes:

I´ll keep in touch.


Quad Core Xeon MacPRO @ 3.0Ghz|2GB Ram|ATI X1900|Mac OS X 10.5.1
 
Hi there!

I have macs for several years.
I´ve just bought my dream machine - a Quad Core MacPRO.

Well, i see now i made a really great mistake by installing Leopard on my new machine!!!:eek:
It frozes not often but randomly letting me no other option than make a hard reset.
It was running Hardware Monitor ( latest version ) during all the incidents, so i´m going to stop using it for a while and see what happens...

At least i know, by your sad experience that this is not a specific problem with my machine.:rolleyes:

I´ll keep in touch.


Quad Core Xeon MacPRO @ 3.0Ghz|2GB Ram|ATI X1900|Mac OS X 10.5.1

I see you also have the X1900. I don't think freeze-ups that we've all been having have anything at all to do with Hardware Monitor. It is far more likely an issue between Leopard's imaging layers (core image/core video, quartz 2D, etc.) and the graphics card.
 
I see you also have the X1900. I don't think freeze-ups that we've all been having have anything at all to do with Hardware Monitor. It is far more likely an issue between Leopard's imaging layers (core image/core video, quartz 2D, etc.) and the graphics card.

Well hardware monitor does poll the graphics card driver so it could trigger something with the graphics drivers.
 
Well hardware monitor does poll the graphics card driver so it could trigger something with the graphics drivers.

Ah, so it does. I'll see if I can get my Mac Pro to freeze while running iTunes visualizer, which according to HM taxes the graphics card to ~80%. If it does and I can repeat the feat, I'll try the same experiment w/o polling by HM.
 
Ah, so it does. I'll see if I can get my Mac Pro to freeze while running iTunes visualizer, which according to HM taxes the graphics card to ~80%. If it does and I can repeat the feat, I'll try the same experiment w/o polling by HM.

Ok. First night running and rendering without Hardware Monitor.
Until now everything is fine. No freezes.:confused:

I´m keeping the Mac processing and running itunes w/ visualizer to see what happens.
 
Still running(fingers crossed)

Ok. First night running and rendering without Hardware Monitor.
Until now everything is fine. No freezes.:confused:

I´m keeping the Mac processing and running itunes w/ visualizer to see what happens.

Well...several tests and still runnin' without Hardware Monitor.
But i´ll keep my fingers crossed.

Lets see if 10.5.2 that will be released at mid January will solve our problems.
 
I haven't had a single freeze since I got the machine over a year ago. But I don't run Hardware Monitor and I updated to Leopard just a couple of weeks ago. And I removed the heat sink off the x1900XT and applied Arctic Silver as soon as I got the machine. It's running ~10 C cooler when idle and ~20 C when under load on the loud stock cooler (I'd like to get the Thermaltake TMG AT1 but I don't like the power cord arrangement).
 
I have the same problem in Tiger!

I've been looking for answers as to why my G4 MDD dual 1.0 Ghz running 10.4.11 (previously 10.4.10 with the same problems) would exhibit the exact symptoms you've been describing. Freezing, music looping on last note etc. I thought temperature was the problem cause it does run hot and I thought the processor may have been bad.
I replaced the processor with a Sonnet 1.8 dual replaced all my ram (I did find one occasionally bad stick) I replaced the front panel board from another G4 MDD, downloaded CHUD 3.5.2 to enable nap mode (that made a big difference in temperature) replaced a cable I thought might be bad, have taken it apart and reassembled a half dozen times and replaced all the fans with much quieter fans that move 4 times the air. I swapped out my video card with a lesser card from one of my other boxes. Installed Hardware Monitor and network monitoring and virus software.
And after all that (or any combination of the above) I now know that my temperature spikes at around 145°F every 2 hours or so for no apparent reason and runs around 105°F the rest of the time unless I'm doing processor intensive work like LiveType.
I'm thinking I need a new Mother Board.
But if all you guys are having roughly the same symptoms with such different platforms, maybe not.
Of course all this would happen at Christmas when I'm on deadline and nobody's around to offer any real support.
Just my thoughts if they can help solve this problem.
At least for me it's not Leopard. Maybe it's the NSA.

Mick
 
Nope. Hardware Monitor has nothing to do with it.

I had 2 freeze-ups today without running HM. One where the desktop froze up after using expose´, the other with the one-note loop symptom.
 
I have been dealing with this problem since we got our new Mac Pro a little over a month ago.

The three times that I have paid attention to the time on the machine, I have noticed that it had frozen at 10:00 PM the previous night. I don't have any scheduled processes that would cause this. Has anybody noticed a regular freeze time?

I have been reading a lot of speculation that the ATI x1900 is the culprit.

For now I'm downgrading to Tiger.

-Lonny

Quad Core Xeon MacPRO @ 3.0Ghz|8GB Ram|ATI X1900|Mac OS X 10.5.1
 
Interesting, I have been running without HWM for the last week or so and have stopped having the overnight freezes.

I'll continue doing so and report back if i get one without HWM running.


Nope. Hardware Monitor has nothing to do with it.

I had 2 freeze-ups today without running HM. One where the desktop froze up after using expose´, the other with the one-note loop symptom.
 
Nope. Hardware Monitor has nothing to do with it.

I had 2 freeze-ups today without running HM. One where the desktop froze up after using expose´, the other with the one-note loop symptom.

Well it could be something else triggered the same problem that Hardware monitor triggered?
 
Well I finally got my very first overnight freeze since i disabled HWM. Thats been 3 weeks or so.

So, it would appear that HWM might cause an increase in the rate of these overnight freezes but on its own is not the cause of them.

Just for grins i'm going to enable HWM again and see if there is an increase in the rate of freezes as the above statement would suggest.

Hmmm i did have that big update from apple yesterday (itunes imovie etc etc)
 
Two weeks ago, I cleaned out my X1900. I blasted the dust out of the air intake and fan assembly and I applied Arctic Silver compound to the GPU and heatsink.

I also don't run HM continuously in the background anymore.

I was getting a desktop or system freeze-up once every two days or so, and haven't had any since. The above steps could just be coincidental. I need another machine I can shell into my MP from to really know anything more.
 
sorry to bring this thread back, but some new knews from the guys making hardware monitor, confirming what i suspected.

Dear Mr ******,

you are receiving this e-mail because you have submitted a problem
report for Hardware Monitor some time ago.

After considerable research, we could identify a defect in the Leopard
version of the graphics drivers for the ATI Radeon X1000 GPU series as
trigger of this issue.

Although Hardware Monitor is not the actual cause of the problem, its
continuous requests for updated readings from the graphics processor
load sensor increase the likelihood that the problem in the graphics driver
occurs. Certain parts of the driver are stressed more than usual, and
the driver may crash, causing the screen content to freeze.

A new version of Hardware Monitor (4.5) has been released today. This
version will try to avoid too much stress on the X1000 Radeon driver, so
the likelihood for the error to occur should be reduced to a "normal"
level. You can download the new version from its official web site:
http://www.bresink.com/osx/216202/download.html

We have made Apple aware of this problem. Because it constitutes a
security hole in Mac OS X Leopard, we hope that Apple will fix it
with high priority, typically in less than six months.

I hope this information is helpful to you. If I can be of further
assistance, please let me know.

Best regards,
Marcel Bresink


Also it mentions it on the site http://www.bresink.com/osx/216202/history.html
hopefully apple will fix this issue.
 
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