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Powerbook freezes or kernel panics on battery ONLY

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This was happening in Tiger right before I installed Leopard. Still happening in Leo. The PB is fine on AC power, but the moment I pull the cord, or start it up on battery it either panics or freezes about one minute after log in. Here is the crash report:

 

Tue Nov 13 23:12:18 2007

 

Unresolved kernel trap(cpu 0): 0x300 - Data access DAR=0x0000000055602290 PC=0x00000000000AA738

Latest crash info for cpu 0:

Exception state (sv=0x3680b280)

PC=0x000AA738; MSR=0x00001030; DAR=0x55602290; DSISR=0x40000000; LR=0x000AA684; R1=0x2CF7BE80; XCP=0x0000000C (0x300 - Data access)

Backtrace:

0x00024A84 0x000B264C 0x65676572

Proceeding back via exception chain:

Exception state (sv=0x3680b280)

previously dumped as "Latest" state. skipping...

Exception state (sv=0x36814280)

PC=0x959EB9D8; MSR=0x0000D030; DAR=0x000FF000; DSISR=0x42000000; LR=0x959F2900; R1=0xBFFFD050; XCP=0x00000030 (0xC00 - System call)

 

BSD process name corresponding to current thread: loginwindow

 

Mac OS version:

9A581

 

Kernel version:

Darwin Kernel Version 9.0.0: Tue Oct 9 21:37:58 PDT 2007; root:xnu-1228~1/RELEASE_PPC

panic(cpu 0 caller 0xFFFF0003): 0x300 - Data access

Latest stack backtrace for cpu 0:

Backtrace:

0x0009AD18 0x0009B6BC 0x00029DC4 0x000AEA90 0x000B22F8

Proceeding back via exception chain:

Exception state (sv=0x3680b280)

PC=0x000AA738; MSR=0x00001030; DAR=0x55602290; DSISR=0x40000000; LR=0x000AA684; R1=0x2CF7BE80; XCP=0x0000000C (0x300 - Data access)

Backtrace:

0x00024A84 0x000B264C 0x65676572

Exception state (sv=0x36814280)

PC=0x959EB9D8; MSR=0x0000D030; DAR=0x000FF000; DSISR=0x42000000; LR=0x959F2900; R1=0xBFFFD050; XCP=0x00000030 (0xC00 - System call)

 

BSD process name corresponding to current thread: loginwindow

 

Anyone can help decipher this? Do I need a new battery? RAM issue? Help! =)

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If guess you don't have AppleCare on that Powerbook 17" 1.33Ghz, 1GB RAM, anymore. Nevertheless, I still think it is a possible hardware issue. But you already guessed that yourself.

 

BTW These kind of error messages are often pretty useless, so it wouldn't surprise me that you'll never get an answer to your question what this error message exactly means.

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