Windows 10: USBSER.SYS does not handle RTS signal correctly

Discus and support USBSER.SYS does not handle RTS signal correctly in Windows 10 Drivers and Hardware to solve the problem; https://answers.microsoft.com/en-us/windows/forum/all/issue-with-rts-control-via-usbsersys/4d3a43a0-cccf-49d1-9b22-b7123a512724... Discussion in 'Windows 10 Drivers and Hardware' started by Stanlazy, Feb 8, 2021.

  1. Stanlazy Win User

    USBSER.SYS does not handle RTS signal correctly


    https://answers.microsoft.com/en-us/windows/forum/all/issue-with-rts-control-via-usbsersys/4d3a43a0-cccf-49d1-9b22-b7123a512724

    https://answers.microsoft.com/en-us/windows/forum/all/virtual-serial-port-usbsersys-is-not-sending/a086cbf6-2d0a-4c46-88fd-73865bc185f5


    So yeah this issue is 10 years old now.


    Using Wireshark+USBPcap and also logic analyzer directly on the USB line, it shows that usbser.sys does not send SET_CONTROL_LINE_STATE packets when I toggle RTS on software.
    [COLOR=rgba0, 0, 0, 1]SET_CONTROL_LINE_STATE is only send on any write to DTR, along with the last RTS value set.[/COLOR]​

    [COLOR=rgba0, 0, 0, 1]
    I'm using pyserial but other post shows that using other software still produces the same issue.​
    [/COLOR]

    [COLOR=rgba0, 0, 0, 1]
    Partial workaround is to set DTR to any value after set RTS. However I sincerely hope this issue is fixed on the driver level.​
    [/COLOR]

    :)
     
    Stanlazy, Feb 8, 2021
    #1
  2. Eric Ber Win User

    BSOD problem - System Thread exception not handled - netwtw04.sys

    Hi,

    Conflicts with the installed driver is one of the possible reasons why you are having an blue screen error code: System Thread exception not handled - netwtw04.sys. To assist you better regarding your blue screen issue, kindly answer the questions below:

    • Have you made any changes to your computer prior to this issue?
    • What troubleshooting steps have you done so far?
    • Have you tried updating your network adapter driver? If not, you can follow the steps on this

      link
      that was provided by JMH (MS-MVP) to update your driver.

    Regards.
     
    Eric Ber, Feb 8, 2021
    #2
  3. Asus RT-N56U weirdness

    They don't have unmanaged switches by the looks of it.

    ERL + ES24 = $305.68
    ER8 = $288.95

    I'm thinking a 24-port switch is very overkill (more power consumption too). ER8 the better way to go? With ER8:
    • UBNT ER8
      • gateway
      • RT-N56U acting as a switch and access point (subject to change in the future depending on how much of a dick it is)
      • Netgear GS108
      • Netgear GS105
      • Netgear GS105
    Should the router be plugged into a UPS or is it electrically robust enough to handle power outages without being an hero?
     
    FordGT90Concept, Feb 8, 2021
    #3
  4. 3Colors Win User

    USBSER.SYS does not handle RTS signal correctly

    Windows Updated(16299.309).KB4088776 Restart is required to complete.

    Hi dalchina. Good news, I followed your suggestion and reinstalled the update and now it appears as "installed correctly" *Biggrin Maybe it was not necessary to run the Windows Update Troubleshooter or maybe if necessary. But using it I do not think it could have worsened something. The installation was very fast, unlike the first time it showed step 1 and step 2 completed.

    Thanks for the suggestions and for the time to respond USBSER.SYS does not handle RTS signal correctly :) Best regards.


    And thanks for the tip of that program, I'll have it on my list.
     
    3Colors, Feb 8, 2021
    #4
Thema:

USBSER.SYS does not handle RTS signal correctly

Loading...
  1. USBSER.SYS does not handle RTS signal correctly - Similar Threads - USBSER SYS does

  2. System thread not handled caused by WinIAP_x64.sys

    in Windows 10 Gaming
    System thread not handled caused by WinIAP_x64.sys: The blue screen show me that the file WinIAP_x64.sys which is located at windows/temp file I search online and I don’t think it supposed to be a system file but I’m abit scared to remove itI also noticed in the event viewer before crash ard 1s esif_uf.exe is run. It seems to...
  3. System thread not handled caused by WinIAP_x64.sys

    in Windows 10 Software and Apps
    System thread not handled caused by WinIAP_x64.sys: The blue screen show me that the file WinIAP_x64.sys which is located at windows/temp file I search online and I don’t think it supposed to be a system file but I’m abit scared to remove itI also noticed in the event viewer before crash ard 1s esif_uf.exe is run. It seems to...
  4. Win 11 - BSOD netwtwt04.sys not handled

    in Windows 10 Gaming
    Win 11 - BSOD netwtwt04.sys not handled: The problem occurs when turning on the laptop. A reboot solves the problem for a few hours. When the computer starts after 5 hours, the black screen reappears. Problem have began with Windows 11. On Windows 10 everything was okey. What i have tried to do:Reinstalled...
  5. SYSTEM THREAD EXCEPTION NOT HANDLED Başarısız:rtwlane6.sys

    in Windows 10 Gaming
    SYSTEM THREAD EXCEPTION NOT HANDLED Başarısız:rtwlane6.sys: Bilgisayarımı kullanırken wi-fi bağlantısı kesildi ama telefonum hala wi-fi ağına bağlıydı yani wi-fi ağında bir problem yoktu. Bende Ağ ve internet ayarları için sorunları gider seçeneğini seçtim tam o sırada bilgisayarım mavi ekran verip bu uyarıyı verdi.Durdurma Kodu:...
  6. SYSTEM THREAD EXCEPTION NOT HANDLED Başarısız:rtwlane6.sys

    in Windows 10 Software and Apps
    SYSTEM THREAD EXCEPTION NOT HANDLED Başarısız:rtwlane6.sys: Bilgisayarımı kullanırken wi-fi bağlantısı kesildi ama telefonum hala wi-fi ağına bağlıydı yani wi-fi ağında bir problem yoktu. Bende Ağ ve internet ayarları için sorunları gider seçeneğini seçtim tam o sırada bilgisayarım mavi ekran verip bu uyarıyı verdi.Durdurma Kodu:...
  7. SYSTEM THREAD EXCEPTION NOT HANDLED Başarısız:rtwlane6.sys

    in Windows 10 Network and Sharing
    SYSTEM THREAD EXCEPTION NOT HANDLED Başarısız:rtwlane6.sys: Bilgisayarımı kullanırken wi-fi bağlantısı kesildi ama telefonum hala wi-fi ağına bağlıydı yani wi-fi ağında bir problem yoktu. Bende Ağ ve internet ayarları için sorunları gider seçeneğini seçtim tam o sırada bilgisayarım mavi ekran verip bu uyarıyı verdi.Durdurma Kodu:...
  8. System Thread Exception Not Handled (igdkmd64.sys)

    in Windows 10 BSOD Crashes and Debugging
    System Thread Exception Not Handled (igdkmd64.sys): (Note: I have been updating from Windows 7 to Windows 10). I have installed Windows 10 on a laptop and two PC’s All went well but today (3 days later) my main PC when switch this morning on gave me the following. (Fig1) System Thread Exception Not Handled (igdkmd64.sys) I...
  9. KMODE/SYSTEM EXCEPTION NOT HANDLED- igdk64md64.sys

    in Windows 10 BSOD Crashes and Debugging
    KMODE/SYSTEM EXCEPTION NOT HANDLED- igdk64md64.sys: I've been having BSOD problems for a little while and the cause is always igdkmd64.sys My laptop is an Acer Predator 17 inch running Windows 10x64 I attached the W7F zipped folder. Thank you for your help.
  10. system thread exception not handled wdf01000.sys

    in Windows 10 BSOD Crashes and Debugging
    system thread exception not handled wdf01000.sys: [ATTACH] I dont know how to fix that, I only have command prompt in advanced options, I must fix with that. I cant go in windows 10 https://answers.microsoft.com/en-us/windows/forum/all/system-thread-exception-not-handled-wdf01000sys/8c25a0ce-3b0d-4212-9c3a-8632662a4a71