Kernel panic, two startup chimes..

[shinji]

Yesterday I had a kernel panic. When I turned the Mac Pro (~3 months old) on again, it chimed twice after the startup chime. I looked this up and it means incompatible RAM... http://docs.info.apple.com/article.html?artnum=58442

That is very strange since I have added no third-party RAM. The only RAM in here are the 2 gb that came with it from Apple.

This is only the second kernel panic I've had, in both cases they were when I had Parallels open.

Don't know if anyone can make sense of the panic.log but here are the tops of both them:

Fri May 18 00:30:27 2007
panic(cpu 0 caller 0x001A429B): Unresolved kernel trap (CPU 0, Type 14=page fault), registers:

this one ends with

Backtrace terminated-invalid frame pointer 0xbfff6638
Kernel loadable modules in backtrace (with dependencies):
com.apple.ATIRadeonX1000(4.5.2)@0x5ac000
dependency: com.apple.iokit.IOPCIFamily(2.2)@0x572000
dependency: com.apple.iokit.IOGraphicsFamily(1.4.5)@0x582000
dependency: com.apple.iokit.IONDRVSupport(1.4.5)@0x59d000

then the second one is

Tue May 22 03:07:56 2007
panic(cpu 1 caller 0x0019A566): interlock timeout for mutex 0x439a290
Backtrace, Format - Frame : Return Address (4 potential args on stack)

and it ends with

Backtrace terminated-invalid frame pointer 0x2532bf58

So what should I do? Should I reseat the RAM and run memtest? How could I be getting the "incompatible RAM" error if this is the RAM that came with it? There was no flashing LED either.

Also, that doc from Apple says that I shouldn't hear the normal startup chime...but I did hear it. And two sounds I heard weren't just beeps, they were chimes.

 

[mad jew]

There's mention of your GPU in there too... Did it start up normally after? Would you be confident opening it up and making sure the RAM and GPU are firmly in place? Is it chiming twice every time you (attempt to) boot up?

 

[shinji]

It did startup completely normally after, and no, it only made the two chime sound following the kernel panics. Though admittedly I leave it on pretty much 24/7, so there are only a limited number of times to go by.

I wouldn't have a problem opening it and making sure everything's firmly in place...if I do that and everything is ok though, then what? Run memtest?

 

[mad jew]

For something like this, I'd back everything up out of habit (although data loss and data access loss look extremely unlikely at this stage). Then I'd probably let it be until another symptom rocks up. If it's a one-off then there's probably not much point troubleshooting any more at this stage. Run Memtest if it makes you feel better though. Alternatively, run the Apple Hardware Test from the OSX discs. You'll need to boot with them in your optical drive, whilst holding D.

 

[shinji]

thanks- will do