|03 Nov 2009||#1|
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Stop 0x124 - what it means and what to try
A "stop 0x124" is fundamentally different to many other types of bluescreens because it stems from a hardware complaint. Stop 0x124 minidumps contain very little practical information, and it is therefore necessary to approach the problem as a case of hardware in an unknown state of distress.
Generic "Stop 0x124" Troubleshooting Strategy:
1) Ensure that none of the hardware components are overclocked. Hardware that is driven beyond its design specifications - by overclocking - can malfunction in unpredictable ways.If stop 0x124 errors persist despite the steps above, and the harware is under warranty, consider returning it and requesting a replacement which does not suffer periodic MCE events. Be aware that attempting the subsequent harware troubleshooting steps may, in some cases, void your warranty:
8) Clean and carefully remove any dust from the inside of the machine. Reseat all connectors and memory modules. Use a can of compressed air to clean out the RAM DIMM sockets as much as possible.Should you find yourself in the situation of having performed all of the steps above without a resolution of the symptom, unfortunately the most likely reason is because the error message is literally correct - something is fundamentally wrong with the machine's hardware.
Windows passes on the hardware error report in the form of a "stop 0x124" because it can't do anything else once the hardware has signalled an uncorrectable fault condition. In technical terms, the vast majority of stop 0x124 crashes correspond to "Machine Check Exceptions" (MCEs) issued by the processor to alert the software to the existence of a hardware problem. It's possible for drivers to indirectly induce hardware to register MCEs by "driving" in ways that are confusing to the hardware, but from a user's point of view that disctinction is so subtle as to be invisible.
It is important to note that there are many different possible MCE triggers, and one machine's stop 0x124 is likely to be entirely different to another's. Hence, it is best not to place too much emphasis on very specialised ways in which other individuals have resolved their own 0x124 problems - the more exotic the other machine's MCE solution, the less likely it is to apply to your own setup.
It is possible - but painful - to interpret the hardware's error report. It's passed along in the so-called "MCi_Status" register, the contents of which are generally visible as bugcheck parameters 3 and 4 on the BSOD screen, as well as in the corresponding minidump.
The trouble is that the hardware's complaints are almost never "practical", in the sense that they would explain what is wrong in layman's terms and include a recommendation for how to fix it. Instead, it's esoteric stuff which is intended for hardware specialists and driver developers.
Interpreting MCi_Status Contents:
This is not a viable troubleshooting methodology for most cases of stop 0x124 crashes, both because of the procedure's complexity and the impracticality of the resultant output. It is included here for the sake of completeness, and in case anyone should wish to go to the extreme in an attempt to understand recalcitrant stop 0x124 crashes on their machine.
Interpreting the numbers a matter of consulting information published by Intel and AMD. The MCi_Status register contents are a bitmask, and each individual bit has a very specific meaning. Reference:
Machine Check Exception - Wikipedia, the free encyclopedia
As an example, a hypothetical stop 0x124 crash may pass on an MCi_Status from the hardware whose contents are below:
Interpretation is performed based on the position of each significant bit, starting from "63" on the far left and ending with bit "0" on the far right:
63: VAL - MCi_STATUS register valid
61: UC - Error uncorrected
60: EN - Error enabled
57: PCC - Processor context corrupt
36: component has received a parity error on the RS[2:0]# pins for a response transaction.
27/26/25: Bus queue error type = "Response Parity Error" (011)
0000 1110 0000 1111
000F 1PPT RRRR IILL
F: "Normal" filtering (0)
PP: Generic (11)
T: Request did not time out (0)
RRRR: Generic Error (0000)
II: Other transaction (11)
LL: Memory hierarchy level "generic" (11)
|My System Specs|
|17 Aug 2010||#2|
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These Bugchecks also can be caused by hardware error, such as a machine check or a nonmaskable interrupt (NMI), occurs. This category also includes disk failures when the memory manager is attempting to read data to satisfy page faults
0x77 – KERNEL_STACK_INPAGE_ERROR
0x7A - KERNEL_DATA_INPAGE_ERROR
0x101 - CLOCK_WATCHDOG_TIMEOUT (Software bugs can cause these errors too,
but they are most common on over-clocked hardware systems.)
|My System Specs|
|12 Feb 2013||#3|
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IMO in case of Stop 0x9C, Machine Check Exception, it is to follow this method.
A Machine Check Exception is usually reported in Stop 0x124, in the first parameter...
WHEA_UNCORRECTABLE_ERROR (124) A fatal hardware error has occurred. Parameter 1 identifies the type of error source that reported the error. Parameter 2 holds the address of the WHEA_ERROR_RECORD structure that describes the error conditon. Arguments: Arg1: 0000000000000000, Machine Check Exception Arg2: fffffa800966f028, Address of the WHEA_ERROR_RECORD structure. Arg3: 00000000be000000, High order 32-bits of the MCi_STATUS value. Arg4: 0000000000800400, Low order 32-bits of the MCi_STATUS value. Debugging Details: ------------------
A machine check exception occurred.
These parameter descriptions apply if the processor is based on the x64 architecture, or the x86 architecture that has the MCA feature available (for example, Intel Pentium Pro, Pentium IV, or Xeon).
MACHINE_CHECK_EXCEPTION (9c) A fatal Machine Check Exception has occurred. KeBugCheckEx parameters; x86 Processors If the processor has ONLY MCE feature available (For example Intel Pentium), the parameters are: 1 - Low 32 bits of P5_MC_TYPE MSR 2 - Address of MCA_EXCEPTION structure 3 - High 32 bits of P5_MC_ADDR MSR 4 - Low 32 bits of P5_MC_ADDR MSR If the processor also has MCA feature available (For example Intel Pentium Pro), the parameters are: 1 - Bank number 2 - Address of MCA_EXCEPTION structure 3 - High 32 bits of MCi_STATUS MSR for the MCA bank that had the error 4 - Low 32 bits of MCi_STATUS MSR for the MCA bank that had the error IA64 Processors 1 - Bugcheck Type 1 - MCA_ASSERT 2 - MCA_GET_STATEINFO SAL returned an error for SAL_GET_STATEINFO while processing MCA. 3 - MCA_CLEAR_STATEINFO SAL returned an error for SAL_CLEAR_STATEINFO while processing MCA. 4 - MCA_FATAL FW reported a fatal MCA. 5 - MCA_NONFATAL SAL reported a recoverable MCA and we don't support currently support recovery or SAL generated an MCA and then couldn't produce an error record. 0xB - INIT_ASSERT 0xC - INIT_GET_STATEINFO SAL returned an error for SAL_GET_STATEINFO while processing INIT event. 0xD - INIT_CLEAR_STATEINFO SAL returned an error for SAL_CLEAR_STATEINFO while processing INIT event. 0xE - INIT_FATAL Not used. 2 - Address of log 3 - Size of log 4 - Error code in the case of x_GET_STATEINFO or x_CLEAR_STATEINFO AMD64 Processors 1 - Bank number 2 - Address of MCA_EXCEPTION structure 3 - High 32 bits of MCi_STATUS MSR for the MCA bank that had the error 4 - Low 32 bits of MCi_STATUS MSR for the MCA bank that had the error Arguments: Arg1: 0000000000000000 Arg2: fffff880009fbc70 Arg3: 0000000000000000 Arg4: 0000000000000000
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