[napoleon981]

I have recently been receiving random Kernel Panics on the average of 1 per day on my PB G4 with 10.4.2. A month ago I had an average of 3 Panics a day, that was the Lookupd issue with the OS and installing the unlockupd patch fixed that error with no issues.

Recently the panics happen at random, sometimes listen to itunes, other times I am web surfing, or just playing a game on the system. It is a 50/50 split between receiving a Kernel Panic Window or the entire system locking up. The only peripherals are a USB mouse which I had removed to see if it was the issue, it was not. Clearing the PRAM and NVRAM did nothing, Applejack has not solved the issue either. All hardware is Apple Factory installed when I purchased the PB 5 months ago. Hardware test shows no issues. One major thing to note, I am currently in the UK and the PB is American, the Power Adapter is an Apple World Travel Adapter, which should be fine to change 240 to 110 output, or so the documentation claims. My Internet here is through a Proxy which could or could not be doing unknown things in the background. I am running the Apple Firewall under stealth mode and the log has several denied UDP connection attempts on ports 67 and 2222 every day... it *looks like* it might be coming from the ISP but I have little experience with Proxies here.

Looking at my system logs at the times of crashes reveals NO error messages, the system simply crashes... quite perplexing. The latest crash did leave the following in the system log: (Queen-Mary being the PBs name, she is royal to me you know)
Oct 5 08:55:01 Queen-Mary mDNSResponder: -1: DNSServiceRegister("iTunes_Ctrl_46D4FD8E0C5A60D7", "_dacp._tcp.", "local.", 3689) failed: Client id -1 invalid (-65549)

Below is the latest crash log... any thoughts???

Thanks!
~Greg

# ********

Wed Oct 5 12:13:58 2005

Unresolved kernel trap(cpu 0): 0x400 - Inst access DAR=0x00000000007A1E10 PC=0x00000000419E0078
Latest crash info for cpu 0:
Exception state (sv=0x2E233280)
PC=0x419E0078; MSR=0x40009030; DAR=0x007A1E10; DSISR=0x40000000; LR=0x000A9694; R1=0x1784BE90; XCP=0x00000010 (0x400 - Inst access)
Backtrace:
0x000A9694
Proceeding back via exception chain:
Exception state (sv=0x2E233280)
previously dumped as "Latest" state. skipping...
Exception state (sv=0x2DB5E500)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)

Kernel version:
Darwin Kernel Version 8.2.0: Fri Jun 24 17:46:54 PDT 2005; root:xnu-792.2.4.obj~3/RELEASE_PPC
panic(cpu 0 caller 0xFFFF0004): 0x400 - Inst access
Latest stack backtrace for cpu 0:
Backtrace:
0x00095544 0x00095A5C 0x0002683C 0x000A819C 0x000ABB00
Proceeding back via exception chain:
Exception state (sv=0x2E233280)
PC=0x419E0078; MSR=0x40009030; DAR=0x007A1E10; DSISR=0x40000000; LR=0x000A9694; R1=0x1784BE90; XCP=0x00000010 (0x400 - Inst access)
Backtrace:
0x000A9694
Exception state (sv=0x2DB5E500)
PC=0x00000000; MSR=0x0000D030; DAR=0x00000000; DSISR=0x00000000; LR=0x00000000; R1=0x00000000; XCP=0x00000000 (Unknown)

Kernel version:
Darwin Kernel Version 8.2.0: Fri Jun 24 17:46:54 PDT 2005; root:xnu-792.2.4.obj~3/RELEASE_PPC

# ********

[napoleon981]

forgot to mention, I am seeing this often in the windowserver log:
Oct 05 12:13:56 [63] kCGErrorIllegalArgument: CGXSetWindowListTags: Operation on a window 0x1 not owned by caller SecurityAgent
Oct 05 12:13:57 [63] kCGErrorIllegalArgument: CGXOrderWindow: Operation on a window 0x1 not owned by caller SecurityAgent

[chris v]

If it's random, and not related to peripherals, it's most likely RAM. If you've got more than one RAM chip, pull them out one at a time & see if it stops.

[Ω]

This is all I could find:

Exhibit One
Exhibit Two
Exhibit Three

The first one looks like the most relevant, but three might have something.

If you are wondering what I went looking for it was this line "panic(cpu 0 caller 0xFFFF0004): 0x400 - Inst access"

Hope it helps