8 Replies Latest reply on Mar 13, 2018 12:07 PM by imshalla

    I get random crash with Ryzen 7 1800x

    kdesrosiers

      We recently bought a Ryzen 7 1800x to build a local server which is in our office. Since the beginning, we got random crashes which occur anytime with no specific reason. However, sometimes we are able to get some verbose log but usually, we got garbage in the syslog. I put in attachment our most recent crash with logs. Unfortunately, we are not able to reproduce the but at all. Therefore, we think it is an issue with our CPU since we observed that the cpu #8 had some issues two times. It would be great if you guys would be able to help us with that issue.

       

      Os: Ubuntu 16.04.02

      Kernel: Linux 4.11.6-041106-generic #201706170517 SMP Sat Jun 17 09:18:46 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

       

      Here is my `lscpu` output:

      Architecture:          x86_64

      CPU op-mode(s):        32-bit, 64-bit

      Byte Order:            Little Endian

      CPU(s):                16

      On-line CPU(s) list:   0-15

      Thread(s) per core:    2

      Core(s) per socket:    8

      Socket(s):             1

      NUMA node(s):          1

      Vendor ID:             AuthenticAMD

      CPU family:            23

      Model:                 1

      Model name:            AMD Ryzen 7 1800X Eight-Core Processor

      Stepping:              1

      CPU MHz:               2200.000

      CPU max MHz:           3600.0000

      CPU min MHz:           2200.0000

      BogoMIPS:              7180.28

      Virtualization:        AMD-V

      L1d cache:             32K

      L1i cache:             64K

      L2 cache:              512K

      L3 cache:              8192K

      NUMA node0 CPU(s):     0-15

      Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_l2 mwaitx hw_pstate vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 xsaves clzero irperf arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic overflow_recov succor smca

        • Re: I get random crash with Ryzen 7 1800x
          randa71

          It's important to have all system spec. RAM, GPU, MOTHERBOARD, etc etc. More details.

          I've read that latest ubuntu version is 17.04. Have you tried that version?

          Reading syslog i've noticed that your motherboard bios are 1201...i have the same motherboard and latest official bios is 1501. Install this one and load all default settings. I have this bios running and is fine.

          In syslog there is often this error: "watchdog: BUG: soft lockup - CPU#12 stuck for 23s!" It could be a bug with that Linux specific version. If i were you, i would try Ubuntu 17.04

          Also for your info, with some Ryzen CPUs there are problems with Linux: perhaps you should read this: gcc segmentation faults on Ryzen / Linux BUT before thinking that you have a Ryzen CPU with those problems, if i were you,

          1)  i would update BIOS to 1501;

          2) i would try latest Ubuntu version with updates;

          3) in BIOS everything is at default? For example RAM?

          • Re: I get random crash with Ryzen 7 1800x
            7r56s

            I've been experiencing this same issue. 

            Debian Testing (kernel 4.12.0-1-amd64)

            ASRock X370 Taichi

            G.SKILL Ripjaws V Series 32GB (2 x 16GB) 3200 (PC4 25600) F4-3200C14D-32GVK

            BIOS revision 3.00 (latest)

             

            I've never overclocked except for testing the SoC Voltage suggestion in the GCC Segfault threat.  I had been running the RAM under the XMP profile for 3200 but have since reverted to 2400 stock speed to see if that was the issue.  I've turned off SMT as was also suggested in the Segfault thread, but that didn't help. I've reset the CMOS.  No change.

             

            My system is lucky to make it 24 hours without locking up.  When it locks up, the fan cycles from full speed to something lower and back and the error code shows 00.

             

            This seems to be a common problem under Linux and I've read that there may be an issue with the earliest batches of the R7 chips.  I've opened a ticket with AMD a couple of days ago, thought they have not responded to it.  I'm thinking of trying to get Newegg to accept the processor, fan, board, and memory and starting over with something that works.

             

            Have you had any luck?

             

             

             

            Architecture:          x86_64
            CPU op-mode(s):        32-bit, 64-bit
            Byte Order:            Little Endian
            CPU(s):                16
            On-line CPU(s) list:   0-15
            Thread(s) per core:    2
            Core(s) per socket:    8
            Socket(s):             1
            NUMA node(s):          1
            Vendor ID:             AuthenticAMD
            CPU family:            23
            Model:                 1
            Model name:            AMD Ryzen 7 1800X Eight-Core Processor
            Stepping:              1
            CPU MHz:               2200.000
            CPU max MHz:           3600.0000
            CPU min MHz:           2200.0000
            BogoMIPS:              7199.90
            Virtualization:        AMD-V
            L1d cache:             32K
            L1i cache:             64K
            L2 cache:              512K
            L3 cache:              8192K
            NUMA node0 CPU(s):     0-15
            Flags:                 fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt pdpe1gb rdtscp lm constant_tsc rep_good nopl nonstop_tsc cpuid extd_apicid aperfmperf pni pclmulqdq monitor ssse3 fma cx16 sse4_1 sse4_2 movbe popcnt aes xsave avx f16c rdrand lahf_lm cmp_legacy svm extapic cr8_legacy abm sse4a misalignsse 3dnowprefetch osvw skinit wdt tce topoext perfctr_core perfctr_nb bpext perfctr_l2 mwaitx hw_pstate vmmcall fsgsbase bmi1 avx2 smep bmi2 rdseed adx smap clflushopt sha_ni xsaveopt xsavec xgetbv1 xsaves clzero irperf arat npt lbrv svm_lock nrip_save tsc_scale vmcb_clean flushbyasid decodeassists pausefilter pfthreshold avic overflow_recov succor smca

             

             

            # dmidecode 3.1
            Getting SMBIOS data from sysfs.
            SMBIOS 3.0.0 present.
            Table at 0x000ED300.

             

            Handle 0x0000, DMI type 0, 24 bytes
            BIOS Information
                Vendor: American Megatrends Inc.
                Version: P3.00
                Release Date: 07/10/2017
                Address: 0xF0000
                Runtime Size: 64 kB
                ROM Size: 16 MB
                Characteristics:
                    PCI is supported
                    BIOS is upgradeable
                    BIOS shadowing is allowed
                    Boot from CD is supported
                    Selectable boot is supported
                    BIOS ROM is socketed
                    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
                BIOS Revision: 5.12

             

            Handle 0x0001, DMI type 1, 27 bytes
            System Information
                Manufacturer: To Be Filled By O.E.M.
                Product Name: To Be Filled By O.E.M.
                Version: To Be Filled By O.E.M.
                Serial Number: To Be Filled By O.E.M.
                UUID: 03000200-0400-0500-0006-000700080009
                Wake-up Type: Power Switch
                SKU Number: To Be Filled By O.E.M.
                Family: To Be Filled By O.E.M.

             

            Handle 0x0002, DMI type 2, 15 bytes
            Base Board Information
                Manufacturer: ASRock
                Product Name: X370 Taichi
                Version:                      
                Serial Number: M80-A5007300029
                Asset Tag:                      
                Features:
                    Board is a hosting board
                    Board is replaceable
                Location In Chassis:                      
                Chassis Handle: 0x0003
                Type: Motherboard
                Contained Object Handles: 0

             

            Handle 0x0003, DMI type 3, 22 bytes
            Chassis Information
                Manufacturer: To Be Filled By O.E.M.
                Type: Desktop
                Lock: Not Present
                Version: To Be Filled By O.E.M.
                Serial Number: To Be Filled By O.E.M.
                Asset Tag: To Be Filled By O.E.M.
                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: To be filled by O.E.M.

             

            Handle 0x0004, DMI type 9, 17 bytes
            System Slot Information
                Designation: PCIE1
                Type: x1 PCI Express
                Current Usage: Available
                Length: Short
                ID: 17
                Characteristics:
                    3.3 V is provided
                    Opening is shared
                    PME signal is supported
                Bus Address: 0000:0c:00.0

             

            Handle 0x0005, DMI type 9, 17 bytes
            System Slot Information
                Designation: PCIE2
                Type: x16 PCI Express
                Current Usage: In Use
                Length: Long
                ID: 18
                Characteristics:
                    3.3 V is provided
                    Opening is shared
                    PME signal is supported
                Bus Address: 0000:0e:00.0

             

            Handle 0x0006, DMI type 9, 17 bytes
            System Slot Information
                Designation: PCIE3
                Type: x8 PCI Express
                Current Usage: Available
                Length: Long
                ID: 19
                Characteristics:
                    3.3 V is provided
                    Opening is shared
                    PME signal is supported
                Bus Address: 0000:ff:00.0

             

            Handle 0x0007, DMI type 9, 17 bytes
            System Slot Information
                Designation: PCIE4
                Type: x1 PCI Express
                Current Usage: Available
                Length: Short
                ID: 20
                Characteristics:
                    3.3 V is provided
                    Opening is shared
                    PME signal is supported
                Bus Address: 0000:0a:00.0

             

            Handle 0x0008, DMI type 9, 17 bytes
            System Slot Information
                Designation: PCIE5_M2_2
                Type: x4 PCI Express
                Current Usage: In Use
                Length: Long
                ID: 21
                Characteristics:
                    3.3 V is provided
                    Opening is shared
                    PME signal is supported
                Bus Address: 0000:0d:00.0

             

            Handle 0x0009, DMI type 9, 17 bytes
            System Slot Information
                Designation: M2_1
                Type: x4 PCI Express
                Current Usage: Available
                Length: Short
                ID: 49
                Characteristics:
                    3.3 V is provided
                    Opening is shared
                    PME signal is supported
                Bus Address: 0000:ff:00.0

             

            Handle 0x000A, DMI type 11, 5 bytes
            OEM Strings
                String 1: To Be Filled By O.E.M.

             

            Handle 0x000B, DMI type 32, 20 bytes
            System Boot Information
                Status: No errors detected

             

            Handle 0x000C, DMI type 40, 14 bytes
            Additional Information 1
                Referenced Handle: 0x00a1
                Referenced Offset: 0x01
                String: MORDOR
                Value: 0x00000000

             

            Handle 0x000D, 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 0x000E, DMI type 16, 23 bytes
            Physical Memory Array
                Location: System Board Or Motherboard
                Use: System Memory
                Error Correction Type: None
                Maximum Capacity: 64 GB
                Error Information Handle: 0x000D
                Number Of Devices: 4

             

            Handle 0x000F, DMI type 19, 31 bytes
            Memory Array Mapped Address
                Starting Address: 0x00000000000
                Ending Address: 0x007FFFFFFFF
                Range Size: 32 GB
                Physical Array Handle: 0x000E
                Partition Width: 2

             

            Handle 0x0010, DMI type 7, 19 bytes
            Cache Information
                Socket Designation: L1 - Cache
                Configuration: Enabled, Not Socketed, Level 1
                Operational Mode: Write Back
                Location: Internal
                Installed Size: 768 kB
                Maximum Size: 768 kB
                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 0x0011, DMI type 7, 19 bytes
            Cache Information
                Socket Designation: L2 - Cache
                Configuration: Enabled, Not Socketed, Level 2
                Operational Mode: Write Back
                Location: Internal
                Installed Size: 4096 kB
                Maximum Size: 4096 kB
                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 0x0012, DMI type 7, 19 bytes
            Cache Information
                Socket Designation: L3 - Cache
                Configuration: Enabled, Not Socketed, Level 3
                Operational Mode: Write Back
                Location: Internal
                Installed Size: 16384 kB
                Maximum Size: 16384 kB
                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 0x0013, DMI type 4, 48 bytes
            Processor Information
                Socket Designation: AM4
                Type: Central Processor
                Family: Zen
                Manufacturer: Advanced Micro Devices, Inc.
                ID: 11 0F 80 00 FF FB 8B 17
                Signature: Family 23, Model 1, 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 1800X Eight-Core Processor        
                Voltage: 1.4 V
                External Clock: 100 MHz
                Max Speed: 4100 MHz
                Current Speed: 3600 MHz
                Status: Populated, Enabled
                Upgrade: Socket AM4
                L1 Cache Handle: 0x0010
                L2 Cache Handle: 0x0011
                L3 Cache Handle: 0x0012
                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 0x0014, 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 0x0015, DMI type 17, 40 bytes
            Memory Device
                Array Handle: 0x000E
                Error Information Handle: 0x0014
                Total Width: Unknown
                Data Width: Unknown
                Size: No Module Installed
                Form Factor: Unknown
                Set: None
                Locator: DIMM 0
                Bank Locator: CHANNEL A
                Type: Unknown
                Type Detail: Unknown
                Speed: Unknown
                Manufacturer: Unknown
                Serial Number: Unknown
                Asset Tag: Not Specified
                Part Number: Unknown
                Rank: Unknown
                Configured Clock Speed: Unknown
                Minimum Voltage: Unknown
                Maximum Voltage: Unknown
                Configured Voltage: Unknown

             

            Handle 0x0016, 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 0x0017, DMI type 17, 40 bytes
            Memory Device
                Array Handle: 0x000E
                Error Information Handle: 0x0016
                Total Width: 64 bits
                Data Width: 64 bits
                Size: 16384 MB
                Form Factor: DIMM
                Set: None
                Locator: DIMM 1
                Bank Locator: CHANNEL A
                Type: DDR4
                Type Detail: Synchronous Unbuffered (Unregistered)
                Speed: 2134 MT/s
                Manufacturer: Unknown
                Serial Number: 00000000
                Asset Tag: Not Specified
                Part Number: F4-3200C14-16GTZSW
                Rank: 2
                Configured Clock Speed: 1067 MT/s
                Minimum Voltage: 1.2 V
                Maximum Voltage: 1.2 V
                Configured Voltage: 1.2 V

             

            Handle 0x0018, DMI type 20, 35 bytes
            Memory Device Mapped Address
                Starting Address: 0x00000000000
                Ending Address: 0x007FFFFFFFF
                Range Size: 32 GB
                Physical Device Handle: 0x0017
                Memory Array Mapped Address Handle: 0x000F
                Partition Row Position: Unknown
                Interleave Position: Unknown
                Interleaved Data Depth: Unknown

             

            Handle 0x0019, 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 0x001A, DMI type 17, 40 bytes
            Memory Device
                Array Handle: 0x000E
                Error Information Handle: 0x0019
                Total Width: Unknown
                Data Width: Unknown
                Size: No Module Installed
                Form Factor: Unknown
                Set: None
                Locator: DIMM 0
                Bank Locator: CHANNEL B
                Type: Unknown
                Type Detail: Unknown
                Speed: Unknown
                Manufacturer: Unknown
                Serial Number: Unknown
                Asset Tag: Not Specified
                Part Number: Unknown
                Rank: Unknown
                Configured Clock Speed: Unknown
                Minimum Voltage: Unknown
                Maximum Voltage: Unknown
                Configured Voltage: Unknown

             

            Handle 0x001B, 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 0x001C, DMI type 17, 40 bytes
            Memory Device
                Array Handle: 0x000E
                Error Information Handle: 0x001B
                Total Width: 64 bits
                Data Width: 64 bits
                Size: 16384 MB
                Form Factor: DIMM
                Set: None
                Locator: DIMM 1
                Bank Locator: CHANNEL B
                Type: DDR4
                Type Detail: Synchronous Unbuffered (Unregistered)
                Speed: 2134 MT/s
                Manufacturer: Unknown
                Serial Number: 00000000
                Asset Tag: Not Specified
                Part Number: F4-3200C14-16GTZSW
                Rank: 2
                Configured Clock Speed: 1067 MT/s
                Minimum Voltage: 1.2 V
                Maximum Voltage: 1.2 V
                Configured Voltage: 1.2 V

             

            Handle 0x001D, DMI type 20, 35 bytes
            Memory Device Mapped Address
                Starting Address: 0x00000000000
                Ending Address: 0x007FFFFFFFF
                Range Size: 32 GB
                Physical Device Handle: 0x001C
                Memory Array Mapped Address Handle: 0x000F
                Partition Row Position: Unknown
                Interleave Position: Unknown
                Interleaved Data Depth: Unknown

             

            Handle 0x001E, DMI type 127, 4 bytes
            End Of Table

              • Re: I get random crash with Ryzen 7 1800x
                alex999

                Hi,

                something new on that topic? Have the same problem: Xenserver 7.2 crashes after a while, mainboard shows CPU problem (EZ debug led).

                Ryzen 7 1700

                MSI B350M VDH-PRO (latest BIOS)

                32GB RAM (certified Corsair 2x 16GB)

                 

                lscpu:

                Architecture:          x86_64

                CPU op-mode(s):        32-bit, 64-bit

                Byte Order:            Little Endian

                CPU(s):                8

                On-line CPU(s) list:   0-7

                Thread(s) per core:    1

                Core(s) per socket:    8

                Socket(s):             1

                Vendor ID:             AuthenticAMD

                CPU family:            23

                Model:                 1

                Model name:            AMD Ryzen 7 1700 Eight-Core Processor

                Stepping:              1

                CPU MHz:               3000.092

                BogoMIPS:              6000.18

                Hypervisor vendor:     Xen

                Virtualization type:   none

                L1d cache:             32K

                L1i cache:             64K

                L2 cache:              512K

                L3 cache:              16384K

              • Re: I get random crash with Ryzen 7 1800x
                enormouschunks

                There is a know bug with the AMD Ryzen 7 1800x processors and Linux.

                  You should be able to open an RMA and they will ship you a different chip.

                 

                 

                There is also another bug with the Linux Kernel which has an update also on 4.10 and 4.11

                  • Re: I get random crash with Ryzen 7 1800x
                    alex999

                    Thank you for your reply!

                     

                    My kernel is a 4.4.0+10. I don't know what means "+10". Is this version affected then?

                     

                    EDIT: I did a memtest86 v7.4 memory test - after more than 6 hours I got a lot of errors for test #3 on CPU1. I'm a little uncertain:

                    - Is memtest86 reliable?

                    - Is it possible that the CPU was crashing and memtest86 shows me a false error of the RAM therefore (because the communication between CPU and RAM tored off)?

                      • Re: I get random crash with Ryzen 7 1800x
                        alex999

                        Ok, Xenserver 7.2 is running in idle-mode with my three vm's without crashing. What I did is

                        - switch off "performance boost" in BIOS (leads to overclocking the CPU from 3 GHz up to 3.7 GHz)

                        - switch off "AMD cool'n'quiet" in BIOS (seems to be some ACPI routines)

                         

                        Now the server seems to work. I put it to productive mode on sunday and up to now it looks good.

                        (The CPU is a Ryzen 7 1700)

                    • Re: I get random crash with Ryzen 7 1800x
                      imshalla

                      There is a Linux Kernel Bug open, see: 196683 – Random Soft Lockup on new Ryzen build

                       

                      And related thread here: Re: Ryzen linux kernel bug 196683 - Random Soft Lockup

                       

                      AFAICS, there are three CPU issues affecting Linux systems:

                       

                      1. SEGV under exotic load(s), see: GitHub - suaefar/ryzen-test: Tools to reproduce randomly crashing processes under load on AMD Ryzen processors on Linux
                      2. streams of "watchdog: BUG: soft lockup" events being logged
                      3. system freezing when idle -- nothing logged

                       

                      The "SEGV" issue appears to only affect early CPUs.  AMD will replace affected CPUs.

                       

                      The "soft lockup" and "system freeze" issues may be related, but are definitely not related to the "SEGV".

                       

                      The "soft lockup" issue may be avoided by a combination of Kernel and Kernel-Command-Line options (see under kernel bug 196683).  My experience is that this is not sufficient to also avoid the "system freeze" issue.

                       

                      The discussion under kernel bug 196683 suggests that there is a power-management related issue with the Ryzen CPUs.  Whatever the issue is, it seems that disabling the C6 (deep-sleep power-saving) state will help avoid "system freeze".  Other voodoo seems to work for some people... though there seems to be a common thread of either avoiding going idle, or otherwise preventing low voltage states (eg: http://www.silence.host/node/1) .

                       

                      AMD have claimed that a late model AGESA will fix the issue.  I cannot testify to that.  It has been reported that the new BIOS options will disable C6, for some or for all cores.

                       

                      Sadly, as far as I know, AMD have (to date) been unable to identify the root cause of the "soft lockup" or "system freeze" issues.