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CJL48

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Registered: 2021-07-06

Posts: 26

Kernal Panic due to Fatal exception in Interrupt during Memtest

MSI Alpha 17
When running memtest over 1024 Mb or more of memory, the screen will show corrupted graphics for a few seconds before going to a 'Kernal Panic' Screen indicating that there was a Fatal Exception in Interrupt. I'm trying to figure out whether this indicates that I need to replace hardware. I've also been having issues with the system freezing while running games such as Minecraft and ULTRAKILL.

Kernel Panic Link

seth

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Registered: 2012-09-03

Posts: 74,664

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

What kind of "memtest"?
See https://wiki.archlinux.org/title/Stress … Memtest86+ to check your RAM, you need to run this for very long (16h, "over night" is short) or until you hit errors for reliable results.

Panic'd on waking the iwlwifi NIC, but there's also a cpu idle (looks like ryzen) and you might also just have caused an OOM w/ the memory test?

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CJL48

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Registered: 2021-07-06

Posts: 26

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

So the bad news is that these kernel panics are now happening without running the memtest. The machine in question has 16GB of RAM, so a 1GB Memtest should not be running it out of memory? I've now had these kernel panics twice shortly after starting the machine, without the memtest running. Just after starting Thunderbird, then just after starting Firefox to check these forums. I'm now on my phone.
I'm running memtester from the Arch package of the same name. It's hitting these errors during the first loop of the test even when giving the test only 1 gig, which is a bad sign.

seth

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Registered: 2012-09-03

Posts: 74,664

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

Do you have more panic reports (for pattern spotting)?

The machine in question has 16GB of RAM, so a 1GB Memtest should not be running it out of memory?

What kind of "memtest"?

You can generally burn through 160GB RAM in a split second if you're trying and apparently not memtest86+

However

without the memtest running. Just after starting Thunderbird, then just after starting Firefox to check these forums

From the first panic the problem is iwlwifi or the CPU, can you use a wired network connection or https://wiki.archlinux.org/title/Tethering and "module_blacklist=iwlwifi", https://wiki.archlinux.org/title/Kernel_parameters ?

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CJL48

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Registered: 2021-07-06

Posts: 26

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

Guess who has two thumbs and another panic report?
This guy!
This time with iwlwifi blacklisted.
Kernel Panic Report 2: I think that my machine might be dying.

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 74,664

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

Page faults.
Make sure to not use anything like XMP, put the RAM into the most conservative timings and actually run memtest86+ over night.

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CJL48

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Registered: 2021-07-06

Posts: 26

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

Okay. So I checked decode-dimms, and it's only detecting one 8gb ram stick in bank 1. But task manager says I have 15 GB ram. Could the kernel panics be caused by this?

seth

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Registered: 2012-09-03

Posts: 74,664

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

dmidecode
cat /proc/meminfo

And

Make sure to not use anything like XMP, put the RAM into the most conservative timings and actually run memtest86+ over night.

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CJL48

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Registered: 2021-07-06

Posts: 26

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

Okay, so I pulled one of the ram modules, and I'm no longer getting kernel panics when I run memtest with 1024 mb of memory. Of course, now decode-dimms is now saying that I have no ram.
Give me a moment, and I'll see if I can pull dmidecode and cat /proc/meminfo for you guys?

EDIT: Okay, this is what I get as output:

MemTotal:        7498332 kB
MemFree:         2061648 kB
MemAvailable:    4388876 kB
Buffers:          169672 kB
Cached:          2031268 kB
SwapCached:            0 kB
Active:          2831116 kB
Inactive:        1371304 kB
Active(anon):    1699432 kB
Inactive(anon):        0 kB
Active(file):    1131684 kB
Inactive(file):  1371304 kB
Unevictable:        9424 kB
Mlocked:            9424 kB
SwapTotal:       3748860 kB
SwapFree:        3748860 kB
Zswap:                 0 kB
Zswapped:              0 kB
Dirty:              1052 kB
Writeback:             0 kB
AnonPages:       2009344 kB
Mapped:           845576 kB
Shmem:             66012 kB
KReclaimable:      88388 kB
Slab:             224212 kB
SReclaimable:      88388 kB
SUnreclaim:       135824 kB
KernelStack:       20432 kB
PageTables:        34764 kB
SecPageTables:      3168 kB
NFS_Unstable:          0 kB
Bounce:                0 kB
WritebackTmp:          0 kB
CommitLimit:     7498024 kB
Committed_AS:    7328848 kB
VmallocTotal:   34359738367 kB
VmallocUsed:      100656 kB
VmallocChunk:          0 kB
Percpu:            12864 kB
HardwareCorrupted:     0 kB
AnonHugePages:    106496 kB
ShmemHugePages:    45056 kB
ShmemPmdMapped:    45056 kB
FileHugePages:    333824 kB
FilePmdMapped:    235520 kB
CmaTotal:              0 kB
CmaFree:               0 kB
Unaccepted:            0 kB
Balloon:               0 kB
HugePages_Total:       0
HugePages_Free:        0
HugePages_Rsvd:        0
HugePages_Surp:        0
Hugepagesize:       2048 kB
Hugetlb:               0 kB
DirectMap4k:      743240 kB
DirectMap2M:     5965824 kB
DirectMap1G:     1048576 kB

# dmidecode 3.7
Getting SMBIOS data from sysfs.
SMBIOS 3.2.0 present.
Table at 0xAD017000.

Handle 0x0000, DMI type 11, 5 bytes
OEM Strings
    String 1:  
    String 2: $BIOSE1110000000000000200
    String 3:  
    String 4:  
    String 5:  

Handle 0x0001, DMI type 0, 26 bytes
Platform Firmware Information
    Vendor: American Megatrends Inc.
    Version: E17EKAMS.101
    Release Date: 10/26/2020
    Address: 0xF0000
    Runtime Size: 64 KiB
    ROM Size: 16 MiB
    Characteristics:
        PCI is supported
        Firmware is upgradeable
        Firmware shadowing is allowed
        Boot from CD is supported
        Selectable boot is supported
        EDD is supported
        5.25"/1.2 MB floppy services are supported (int 13h)
        3.5"/720 kB floppy services are supported (int 13h)
        3.5"/2.88 MB floppy services are supported (int 13h)
        Print screen service is supported (int 5h)
        8042 keyboard services are supported (int 9h)
        Serial services are supported (int 14h)
        Printer services are supported (int 17h)
        ACPI is supported
        USB legacy is supported
        BIOS boot specification is supported
        Targeted content distribution is supported
        UEFI is supported
    Platform Firmware Revision: 1.1

Handle 0x0002, DMI type 1, 27 bytes
System Information
    Manufacturer: Micro-Star International Co., Ltd.
    Product Name: Alpha 17 A4DEK
    Version: REV:1.0
    Serial Number: K2101N0085455
    UUID: 49c15b31-4b91-a54f-8116-80d258f47a71
    Wake-up Type: Power Switch
    SKU Number: 17EK.1
    Family: Al

Handle 0x0003, DMI type 2, 15 bytes
Base Board Information
    Manufacturer: Micro-Star International Co., Ltd.
    Product Name: MS-17EK
    Version: REV:1.0
    Serial Number: BSS-0123456789
    Asset Tag: Default string
    Features:
        Board is a hosting board
        Board is replaceable
    Location In Chassis: Default string
    Chassis Handle: 0x0004
    Type: Motherboard
    Contained Object Handles: 0

Handle 0x0004, DMI type 3, 22 bytes
Chassis Information
    Manufacturer: Micro-Star International Co., Ltd.
    Type: Notebook
    Lock: Not Present
    Version: Default string
    Serial Number: 20PN108394
    Asset Tag: Default string
    Boot-up State: Safe
    Power Supply State: Safe
    Thermal State: Safe
    Security Status: None
    OEM Information: 0x00000000
    Height: Unspecified
    Number Of Power Cords: 1
    Contained Elements: 0
    SKU Number: Default string

Handle 0x0005, DMI type 10, 6 bytes
On Board Device Information
    Type: Video
    Status: Enabled
    Description:    To Be Filled By O.E.M.

Handle 0x0006, DMI type 12, 5 bytes
System Configuration Options
    Option 1: Default string

Handle 0x0007, DMI type 32, 20 bytes
System Boot Information
    Status: No errors detected

Handle 0x0008, DMI type 248, 12 bytes
OEM-specific Type
    Header and Data:
        F8 0C 08 00 01 4C E0 00 00 00 00 00

Handle 0x0009, DMI type 43, 31 bytes
TPM Device
    Vendor ID: AMD
    Specification Version: 2.0
    Firmware Revision: 3.42
    Description: AMD
    Characteristics:
        Family configurable via platform software support
    OEM-specific Information: 0x00000000

Handle 0x000A, DMI type 18, 23 bytes
32-bit Memory Error Information
    Type: OK
    Granularity: Unknown
    Operation: Unknown
    Vendor Syndrome: Unknown
    Memory Array Address: Unknown
    Device Address: Unknown
    Resolution: Unknown

Handle 0x000B, DMI type 16, 23 bytes
Physical Memory Array
    Location: System Board Or Motherboard
    Use: System Memory
    Error Correction Type: None
    Maximum Capacity: 32 GiB
    Error Information Handle: 0x000A
    Number Of Devices: 2

Handle 0x000C, DMI type 19, 31 bytes
Memory Array Mapped Address
    Starting Address: 0x00000000000
    Ending Address: 0x001FFFFFFFF
    Range Size: 8 GiB
    Physical Array Handle: 0x000B
    Partition Width: 1

Handle 0x000D, DMI type 7, 27 bytes
Cache Information
    Socket Designation: L1 - Cache
    Configuration: Enabled, Not Socketed, Level 1
    Operational Mode: Write Back
    Location: Internal
    Installed Size: 512 KiB
    Maximum Size: 512 KiB
    Supported SRAM Types:
        Pipeline Burst
    Installed SRAM Type: Pipeline Burst
    Speed: 1 ns
    Error Correction Type: Multi-bit ECC
    System Type: Unified
    Associativity: 8-way Set-associative

Handle 0x000E, DMI type 7, 27 bytes
Cache Information
    Socket Designation: L2 - Cache
    Configuration: Enabled, Not Socketed, Level 2
    Operational Mode: Write Back
    Location: Internal
    Installed Size: 4 MiB
    Maximum Size: 4 MiB
    Supported SRAM Types:
        Pipeline Burst
    Installed SRAM Type: Pipeline Burst
    Speed: 1 ns
    Error Correction Type: Multi-bit ECC
    System Type: Unified
    Associativity: 8-way Set-associative

Handle 0x000F, DMI type 7, 27 bytes
Cache Information
    Socket Designation: L3 - Cache
    Configuration: Enabled, Not Socketed, Level 3
    Operational Mode: Write Back
    Location: Internal
    Installed Size: 8 MiB
    Maximum Size: 8 MiB
    Supported SRAM Types:
        Pipeline Burst
    Installed SRAM Type: Pipeline Burst
    Speed: 1 ns
    Error Correction Type: Multi-bit ECC
    System Type: Unified
    Associativity: 16-way Set-associative

Handle 0x0010, DMI type 4, 48 bytes
Processor Information
    Socket Designation: FP6
    Type: Central Processor
    Family: Zen
    Manufacturer: Advanced Micro Devices, Inc.
    ID: 01 0F 86 00 FF FB 8B 17
    Signature: Family 23, Model 96, Stepping 1
    Flags:
        FPU (Floating-point unit on-chip)
        VME (Virtual mode extension)
        DE (Debugging extension)
        PSE (Page size extension)
        TSC (Time stamp counter)
        MSR (Model specific registers)
        PAE (Physical address extension)
        MCE (Machine check exception)
        CX8 (CMPXCHG8 instruction supported)
        APIC (On-chip APIC hardware supported)
        SEP (Fast system call)
        MTRR (Memory type range registers)
        PGE (Page global enable)
        MCA (Machine check architecture)
        CMOV (Conditional move instruction supported)
        PAT (Page attribute table)
        PSE-36 (36-bit page size extension)
        CLFSH (CLFLUSH instruction supported)
        MMX (MMX technology supported)
        FXSR (FXSAVE and FXSTOR instructions supported)
        SSE (Streaming SIMD extensions)
        SSE2 (Streaming SIMD extensions 2)
        HTT (Multi-threading)
    Version: AMD Ryzen 7 4800H with Radeon Graphics         
    Voltage: 1.2 V
    External Clock: 100 MHz
    Max Speed: 4300 MHz
    Current Speed: 2900 MHz
    Status: Populated, Enabled
    Upgrade: None
    L1 Cache Handle: 0x000D
    L2 Cache Handle: 0x000E
    L3 Cache Handle: 0x000F
    Serial Number: Unknown
    Asset Tag: Unknown
    Part Number: Unknown
    Core Count: 8
    Core Enabled: 8
    Thread Count: 16
    Characteristics:
        64-bit capable
        Multi-Core
        Hardware Thread
        Execute Protection
        Enhanced Virtualization
        Power/Performance Control

Handle 0x0011, DMI type 18, 23 bytes
32-bit Memory Error Information
    Type: OK
    Granularity: Unknown
    Operation: Unknown
    Vendor Syndrome: Unknown
    Memory Array Address: Unknown
    Device Address: Unknown
    Resolution: Unknown

Handle 0x0012, DMI type 17, 84 bytes
Memory Device
    Array Handle: 0x000B
    Error Information Handle: 0x0011
    Total Width: Unknown
    Data Width: Unknown
    Size: No Module Installed
    Form Factor: Unknown
    Set: None
    Locator: DIMM 0
    Bank Locator: P0 CHANNEL A
    Type: Unknown
    Type Detail: Unknown

Handle 0x0013, DMI type 18, 23 bytes
32-bit Memory Error Information
    Type: OK
    Granularity: Unknown
    Operation: Unknown
    Vendor Syndrome: Unknown
    Memory Array Address: Unknown
    Device Address: Unknown
    Resolution: Unknown

Handle 0x0014, DMI type 17, 84 bytes
Memory Device
    Array Handle: 0x000B
    Error Information Handle: 0x0013
    Total Width: 64 bits
    Data Width: 64 bits
    Size: 8 GiB
    Form Factor: SODIMM
    Set: None
    Locator: DIMM 0
    Bank Locator: P0 CHANNEL B
    Type: DDR4
    Type Detail: Synchronous Unbuffered (Unregistered)
    Speed: 3200 MT/s
    Manufacturer: Hynix
    Serial Number: 84A6A4BB
    Asset Tag: Not Specified
    Part Number: HMA81GS6DJR8N-XN    
    Rank: 1
    Configured Memory Speed: 3200 MT/s
    Minimum Voltage: 1.2 V
    Maximum Voltage: 1.2 V
    Configured Voltage: 1.2 V
    Memory Technology: DRAM
    Memory Operating Mode Capability: Volatile memory
    Firmware Version: Unknown
    Module Manufacturer ID: Bank 1, Hex 0xAD
    Module Product ID: Unknown
    Memory Subsystem Controller Manufacturer ID: Unknown
    Memory Subsystem Controller Product ID: Unknown
    Non-Volatile Size: None
    Volatile Size: 8 GiB
    Cache Size: None
    Logical Size: None

Handle 0x0015, DMI type 20, 35 bytes
Memory Device Mapped Address
    Starting Address: 0x00000000000
    Ending Address: 0x001FFFFFFFF
    Range Size: 8 GiB
    Physical Device Handle: 0x0014
    Memory Array Mapped Address Handle: 0x000C
    Partition Row Position: Unknown
    Interleave Position: Unknown
    Interleaved Data Depth: Unknown

Handle 0x0016, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J2304/J2300
    Internal Connector Type: None
    External Reference Designator: Keyboard
    External Connector Type: PS/2
    Port Type: Keyboard Port

Handle 0x0017, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J3811
    Internal Connector Type: None
    External Reference Designator: Touch pad
    External Connector Type: PS/2
    Port Type: Mouse Port

Handle 0x0018, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J1504
    Internal Connector Type: None
    External Reference Designator: USB 3.0
    External Connector Type: Access Bus (USB)
    Port Type: USB

Handle 0x0019, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J1500
    Internal Connector Type: None
    External Reference Designator: USB 3.1
    External Connector Type: Access Bus (USB)
    Port Type: USB

Handle 0x001A, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J1502
    Internal Connector Type: None
    External Reference Designator: USB 3.1
    External Connector Type: Access Bus (USB)
    Port Type: USB

Handle 0x001B, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J1501
    Internal Connector Type: None
    External Reference Designator: USB 3.1 Type-C
    External Connector Type: Access Bus (USB)
    Port Type: USB

Handle 0x001C, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J1503
    Internal Connector Type: None
    External Reference Designator: USB 3.1 Type-C
    External Connector Type: Access Bus (USB)
    Port Type: USB

Handle 0x001D, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J1300
    Internal Connector Type: None
    External Reference Designator: Network
    External Connector Type: RJ-45
    Port Type: Network Port

Handle 0x001E, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J1701
    Internal Connector Type: SAS/SATA Plug Receptacle
    External Reference Designator: Sata HDD
    External Connector Type: None
    Port Type: SATA

Handle 0x001F, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J1703
    Internal Connector Type: SAS/SATA Plug Receptacle
    External Reference Designator: Sata ODD
    External Connector Type: None
    Port Type: SATA

Handle 0x0020, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J1101
    Internal Connector Type: None
    External Reference Designator: DP0
    External Connector Type: None
    Port Type: Video Port

Handle 0x0021, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J1100
    Internal Connector Type: None
    External Reference Designator: DP1
    External Connector Type: None
    Port Type: Video Port

Handle 0x0022, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J2103
    Internal Connector Type: None
    External Reference Designator: Microphone
    External Connector Type: Mini Jack (headphones)
    Port Type: Audio Port

Handle 0x0023, DMI type 8, 9 bytes
Port Connector Information
    Internal Reference Designator: J2105
    Internal Connector Type: None
    External Reference Designator: Headphone
    External Connector Type: Mini Jack (headphones)
    Port Type: Audio Port

Handle 0x0024, DMI type 9, 17 bytes
System Slot Information
    Designation: J3604
    Type: PCI Express x8
    Data Bus Width: 8x or x8
    Current Usage: In Use
    Length: Short
    ID: 1
    Characteristics:
        3.3 V is provided
        PME signal is supported
        Hot-plug devices are supported
    Bus Address: 0000:00:01.1

Handle 0x0025, DMI type 9, 17 bytes
System Slot Information
    Designation: J3711
    Type: M.2 Socket 1-SD
    Data Bus Width: 1x or x1
    Current Usage: In Use
    Length: Short
    ID: 3
    Characteristics:
        3.3 V is provided
        PME signal is supported
        Hot-plug devices are supported
    Bus Address: 0000:00:01.2

Handle 0x0026, DMI type 9, 17 bytes
System Slot Information
    Designation: J3704
    Type: M.2 Socket 3
    Data Bus Width: 2x or x2
    Current Usage: Available
    Length: Short
    ID: 5
    Characteristics:
        3.3 V is provided
        PME signal is supported
        Hot-plug devices are supported
    Bus Address: 0200:00:01.7

Handle 0x0027, DMI type 9, 17 bytes
System Slot Information
    Designation: J3709
    Type: M.2 Socket 1-SD
    Data Bus Width: 1x or x1
    Current Usage: Available
    Length: Short
    ID: 6
    Characteristics:
        3.3 V is provided
        PME signal is supported
        Hot-plug devices are supported
    Bus Address: 0200:00:01.5

Handle 0x0028, DMI type 41, 11 bytes
Onboard Device
    Reference Designation: Onboard LAN Brodcom
    Type: Ethernet
    Status: Enabled
    Type Instance: 1
    Bus Address: 0000:05:00.0

Handle 0x0029, DMI type 41, 11 bytes
Onboard Device
    Reference Designation: HD Audio Controller
    Type: Sound
    Status: Enabled
    Type Instance: 1
    Bus Address: 0000:09:00.6

Handle 0x002A, DMI type 13, 22 bytes
Firmware Language Information
    Language Description Format: Long
    Installable Languages: 3
        en|US|iso8859-1
        zh|CN|unicode
        zh|TW|unicode
    Currently Installed Language: en|US|iso8859-1

Handle 0x002B, DMI type 127, 4 bytes
End Of Table

Last edited by CJL48 (2026-04-18 18:53:06)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 74,664

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

Please use [code][/code] tags, not "quote" tags. Edit your post in this regard.

MemTotal:        7498332 kB

but I assume that's w/ only one DIMM present anyway (no other is listed in dmidecode)?
Are both DIMMS from the same type/batch (did you buy them together, as a pair)?

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CJL48

Member

Registered: 2021-07-06

Posts: 26

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

Post edited, thanks for the reminder about the code tag.
Yes, this is with a single DIMM present. I believe that both DIMMS are from the same type and batch, I believe that they came with the laptop. I've been able to leave the laptop on for several hours without trouble, with memtest running all that time, so it appears that it's either the socket or the ram module itself that is faulty. I can try to get the meminfo and dmidecode with both modules, and that might be a good next step for troubleshooting.

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 74,664

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

so it appears that it's either the socket or the ram module itself that is faulty

Easy enough to test by inserting the 2nd DIMM into the first slot

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CJL48

Member

Registered: 2021-07-06

Posts: 26

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

Powering on the computer with either the 2nd DIMM in the first slot or the 1st DIMM in the second slot resulted in a failure to boot. Returning the 1st DIMM to the 1st slot resulted in a successful boot.
Machine no longer boots with both DIMM modules inserted.

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 74,664

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

so it appears that … the ram module itself that is faulty

Luckily RAM isn't too exp… ohhh. Ohh! Oh

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CJL48

Member

Registered: 2021-07-06

Posts: 26

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

If it were just the RAM, I might just replace the broken module, but since the socket is nonfunctional as well I would probably need to either a) take the laptop to a repair shop, or b) learn to solder and get a soldering iron, in addition to buying a replacement socket. The way the ram sockets are arranged, the two sockets may also be a single unit. So I'm giving serious consideration to getting a replacement machine, and moving the 4tb drive I have in the current one over.

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 74,664

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

Does the system boot when you plug the broken DIMM into the 1st slot and good DIMM into the 2nd one?
You simply might have to fill the first slot, but w/ only one functional DIMM that's kinda hard to test

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CJL48

Member

Registered: 2021-07-06

Posts: 26

Re: Kernal Panic due to Fatal exception in Interrupt during Memtest

So...I haven't tried putting the 2nd DIMM back in yet, but that might not matter. Because I just had my machine kernel panic despite the "bad" stick of ram not being present.