Lenovo C940 BSODs While in Modern Standby  

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  1. Posts : 42
    10
    Thread Starter
       #11

    Nope. Stock i5 proc. Stock c940, base model.

    I guess I should send it to their depot and then contact their depot team about that?

    Is there any way that the log could be wrong about that speed? OR can I rely on the log as evidence that the hardware configuration is messed up?
      My Computer


  2. Posts : 40,847
    windows 10 professional version 1607 build 14393.969 64 bit
       #12

    The log collector commands displayed these results:

    Code:
    Name              : Intel(R) Core(TM) i5-1035G4 CPU @ 1.10GHz
    Description       : Intel64 Family 6 Model 126 Stepping 5
    Manufacturer      : GenuineIntel
    DeviceID          : CPU0
    SocketDesignation : U3E1
    CurrentClockSpeed : 1098
    CPUStatus         : 1
    LastErrorCode     : 
    ErrorDescription  : 
    PartNumber        : To Be Filled By O.E.M.
    Revision          : 32261
    SerialNumber      : To Be Filled By O.E.M.
    ProcessorId       : BFEBFBFF000706E5
    Status            : OK
    StatusInfo        : 3
    Stepping          : 
    CurrentVoltage    : 7
    VoltageCaps       :
    Code:
    Location     : ChannelA-DIMM0
    BankLabel    : BANK 0
    Manufacturer : Samsung
    MemoryType   : LPDDR4
    FormFactor   : Unknown
    Capacity     : 4GB
    Speed        : 4267
    Serial       : 00000000
    PartNumber   : K4U6E3S4AA-MGCL     
    ECC          : False
    TypeDetail   : {Synchronous}
    
    Location     : ChannelB-DIMM0
    BankLabel    : BANK 2
    Manufacturer : Samsung
    MemoryType   : LPDDR4
    FormFactor   : Unknown
    Capacity     : 4GB
    Speed        : 4267
    Serial       : 00000000
    PartNumber   : K4U6E3S4AA-MGCL     
    ECC          : False
    TypeDetail   : {Synchronous}
      My Computer


  3. Posts : 42
    10
    Thread Starter
       #13

    Okie dokie, well back it will have to go to the depot...

    Any tips on how I can get the best from Lenovo's depot team -- much appreciated. That includes any other technical info I can send to them, based on these BSODs and outputs, about why it's failing, and how I can hold them to account for fixing that / checking that they did fix it.
      My Computer


  4. Posts : 40,847
    windows 10 professional version 1607 build 14393.969 64 bit
       #14

    Find out:
    a) do the Lenovo yoga come with Samsung RAM or was the RAM replaced when the motherboard was replaced?
    b) is the RAM speed compatible or incompatible with the Intel I5 CPU as per the max memory in the Intel specifications?
    c) should the RAM speed exceed the speed specs for the Intel CPU?


    Code:
    Memory Specifications
    
        Max Memory Size (dependent on memory type) 64 GB
        Memory Types DDR4-3200, LPDDR4-3733
        Max # of Memory Channels 2
        ECC Memory Supported  No
      My Computer


  5. Posts : 42
    10
    Thread Starter
       #15

    zbook said:
    Find out:
    a) do the Lenovo yoga come with Samsung RAM or was the RAM replaced when the motherboard was replaced?
    b) is the RAM speed compatible or incompatible with the Intel I5 CPU as per the max memory in the Intel specifications?
    c) should the RAM speed exceed the speed specs for the Intel CPU?


    Code:
    Memory Specifications
    
        Max Memory Size (dependent on memory type) 64 GB
        Memory Types DDR4-3200, LPDDR4-3733
        Max # of Memory Channels 2
        ECC Memory Supported ‡ No
    HAve now put this back to the Lenovo tech support guy. He'll presumably have to escalate to the advanced support team. In the mean time, they won't guarantee my depot repair would be done before when I need the laptop mid-February, so I might now have to wait until after 17 Feb...
      My Computer


  6. Posts : 40,847
    windows 10 professional version 1607 build 14393.969 64 bit
       #16

    An overclock can cause BSOD.
    So all computers are returned to stock.
    And specifications are checked for incompatibility.
      My Computer


  7. Posts : 42
    10
    Thread Starter
       #17

    zbook said:
    An overclock can cause BSOD.
    So all computers are returned to stock.
    And specifications are checked for incompatibility.
    From Lenovo, in response to my question on the RAM:

    "Your CPU has a base frequency of 1100Mhz. However it also has 4 cores, with 8 threads. Effectively, this means your CPU can access your data at a rate of 1100Mhz 8 times per second, simultaneously. This is in line with the RAM installed, which are 2 LPDDR4 cards with a max speed of 4267Mhz."

    I've responded to say that the explanation doesn't match with the technical specifications set out by Intel (which I would think are more relevant than any justification provided by Lenovo...).

    Edit: Now he's escalating it to their advanced tech support to comment... He says he does not think incompatible RAM and Proc should cause computer problems I'm near wits end!

    - - - Updated - - -

    zbook said:
    Find out:
    a) do the Lenovo yoga come with Samsung RAM or was the RAM replaced when the motherboard was replaced?
    b) is the RAM speed compatible or incompatible with the Intel I5 CPU as per the max memory in the Intel specifications?
    c) should the RAM speed exceed the speed specs for the Intel CPU?


    Code:
    Memory Specifications
    
        Max Memory Size (dependent on memory type) 64 GB
        Memory Types DDR4-3200, LPDDR4-3733
        Max # of Memory Channels 2
        ECC Memory Supported  No


    Solved: We were in fact incorrect.

    4267 is Mbps. 3733 is Mhz. They are in fact equivalent. I've confirmed.

    So any further diagnostic review of the logs would be useful. Thanks for all your help thus far.
    Last edited by mike302; 24 Jan 2020 at 08:17.
      My Computer


  8. Posts : 40,847
    windows 10 professional version 1607 build 14393.969 64 bit
       #18

    The units were missing in one for the comparison.
    Surprising that the vendors are using different units.

    Uninstall and reinstall: Netwtw08.sys
    Intel(R) Wireless-AC 9560

    https://answers.microsoft.com/en-us/...0-8d22254aa1c1

    Source for new driver: Lenovo website followed by Windows updates

    Code:
    Netwtw08     ___ Intel(R) Wireless  ___ Intel(R) Wireless  Kernel        Manual     Stopped    OK         FALSE       FALSE        2,899,968         4,841,472   0          16/12/2019 09:01:17    C:\WINDOWS\system32\drivers\Netwtw08.sys         8,192
    Code:
    netwtw08	___ Intel(R) Wireless Adapter Driver for Windows 10 - 64 Bit	c:\windows\system32\drivers\netwtw08.sys	Kernel Driver	No	Manual	Stopped	OK	Normal	No	No
    Code:
    Name	[00000001] Intel(R) Wireless-AC 9560 160MHz
    Adapter Type	Ethernet 802.3
    Product Type	Intel(R) Wireless-AC 9560 160MHz
    Installed	Yes
    PNP Device ID	PCI\VEN_8086&DEV_34F0&SUBSYS_00348086&REV_30\3&11583659&1&A3
    Last Reset	23/01/2020 23:04
    Index	1
    Service Name	Netwtw08
    IP Address	192.168.1.113, fe80::48a9:8fae:c6d8:6126
    IP Subnet	255.255.255.0, 64
    Default IP Gateway	192.168.1.254
    DHCP Enabled	Yes
    DHCP Server	192.168.1.254
    DHCP Lease Expires	24/01/2020 23:05
    DHCP Lease Obtained	23/01/2020 23:05
    MAC Address	‪50:E0:85:05:CB:98‬
    Memory Address	0x1D164000-0x1D167FFF
    IRQ Channel	IRQ 4294967282
    IRQ Channel	IRQ 4294967281
    Driver	C:\WINDOWS\SYSTEM32\DRIVERS\NETWTW08.SYS (21.60.2.1, 8.70 MB (9,127,200 bytes), 18/12/2019 07:35)
      My Computer


  9. Posts : 42
    10
    Thread Starter
       #19

    zbook said:
    The units were missing in one for the comparison.
    Surprising that the vendors are using different units.

    Uninstall and reinstall: Netwtw08.sys
    Intel(R) Wireless-AC 9560

    https://answers.microsoft.com/en-us/...0-8d22254aa1c1

    Source for new driver: Lenovo website followed by Windows updates

    Code:
    Netwtw08     ___ Intel(R) Wireless  ___ Intel(R) Wireless  Kernel        Manual     Stopped    OK         FALSE       FALSE        2,899,968         4,841,472   0          16/12/2019 09:01:17    C:\WINDOWS\system32\drivers\Netwtw08.sys         8,192
    Code:
    netwtw08	___ Intel(R) Wireless Adapter Driver for Windows 10 - 64 Bit	c:\windows\system32\drivers\netwtw08.sys	Kernel Driver	No	Manual	Stopped	OK	Normal	No	No
    Code:
    Name	[00000001] Intel(R) Wireless-AC 9560 160MHz
    Adapter Type	Ethernet 802.3
    Product Type	Intel(R) Wireless-AC 9560 160MHz
    Installed	Yes
    PNP Device ID	PCI\VEN_8086&DEV_34F0&SUBSYS_00348086&REV_30\3&11583659&1&A3
    Last Reset	23/01/2020 23:04
    Index	1
    Service Name	Netwtw08
    IP Address	192.168.1.113, fe80::48a9:8fae:c6d8:6126
    IP Subnet	255.255.255.0, 64
    Default IP Gateway	192.168.1.254
    DHCP Enabled	Yes
    DHCP Server	192.168.1.254
    DHCP Lease Expires	24/01/2020 23:05
    DHCP Lease Obtained	23/01/2020 23:05
    MAC Address	‪50:E0:85:05:CB:98‬
    Memory Address	0x1D164000-0x1D167FFF
    IRQ Channel	IRQ 4294967282
    IRQ Channel	IRQ 4294967281
    Driver	C:\WINDOWS\SYSTEM32\DRIVERS\NETWTW08.SYS (21.60.2.1, 8.70 MB (9,127,200 bytes), 18/12/2019 07:35)
    Thanks. A few things here:

    1. The computer apparently crashed MANY TIMES today between 9:14AM and 2PM -- at one point, it was crashing every 3 minutes. No one was home during this time, and the computer should've been asleep. It was not touched since just before midnight, and few/no event viewer logs between 11pm yesterday and the first crash today. I've attached a new pack of logs.

    2. I got home around 2pm and disabled the Verifier settings. It has been more stable since then, but it BSOD'd coming out of about a 30-40 minute sleep state, where I used the power button to sleep it and wake it. The attached logs were created immediately after that. Some of the logs will be from crashes related to Driver stress testing; others maybe not from that.

    3. I've uninstalled the network adapter and reinstalled the driver direct from Intel; but now I see you specifically suggested to go to the Lenovo driver. I'd note that one is out of date, but I'll uninstall the Intel one and install the Lenovo one.
      My Computer


  10. Posts : 40,847
    windows 10 professional version 1607 build 14393.969 64 bit
       #20

    The best tested drivers for the computer's configuration are on the Lenovo website.
    These should always be first choice.

    Sometimes for computer stability drivers need to be rolled back.

    Drivers are typically displayed by date and version.

    The most up to date Windows can become corrupt.
    In a similar fashion the most up to date driver can become corrupt.

    Uninstall: semav6msr64.sys
    Sema software

    Code:
    semav6msr64  semav6msr64            semav6msr64            Kernel        Manual     Running    OK         TRUE        FALSE        12,288            4,096       0          19/07/2019 04:49:03    \??\C:\Windows\system32\drivers\semav6msr64.sys  4,096
    Code:
    semav6msr64	semav6msr64	\??\c:\windows\system32\drivers\semav6msr64.sys	Kernel Driver	Yes	Manual	Running	OK	Normal	No	Yes
    Code:
    semav6msr64.sys Thu Jul 18 20:49:03 2019 (5D313DAF)
      My Computer


 

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