Windows 10: PeekNamedPipe unexpected behaviour bug?

I was recently scratching my head for some time while i was working with named pipes. So in my setup, i had the "reader" and the "writer" ends of a pipe created in "PIPE_TYPE_MESSAGE PIPE_READMODE_BYTE" mode. The writer called twice the WriteFile api to send some data to the reader. After the second call to WriteFile by the writer, the reader used the PeekNamedPipe to peek at the data written by the writer. To my surprise, i was always getting only the data of the first WriteFile call even though the peek length included both writes. After reading more carefully the documentation, i noticed

:)

 

Blue Screen - Unexpected Kernal mode trap

Hi Anne,

Thank you for writing to Microsoft Community forum.

This issue may occur when your computer lacks sufficient kernel space to process kernel-mode drivers

To have a better clarity on the issue and guide you accordingly, respond to the questions listed below.

1. What is the make and model of the PC?
   
2. Were there any changes made on the computer prior to this issue?
   

Meanwhile, you may try the troubleshooting steps suggested in the articles listed below and check if it works:

1. Troubleshoot blue screen errors.
   
2. Troubleshoot UNEXPECTED_KERNEL_MODE_TRAP
   
3. Bug check: UNEXPECTED_ KERNEL_ MODE_ TRAP
   

Regards,

 

External hard drive ununsual behaviour

Thank you for getting back so quickly. Unfortunately it displayed the same behaviour any more suggestions would be greatly appreciated.

 

Hibernating laptop changes to sleep behaviour after Windows 10 May 2019 update

Hi Aditya,

Thank you for your reply. I have tried the two steps (turning of Hybrid sleep and Fast startup) you suggested but to no avail. Okay, for your two questions:

1. My laptop is a HP Pavilion 14-bf101tx, and currently running Windows 10 1903 (upgrading from 1809).
2. Nope. No error messages. I suppose the boot process was successful, however, my battery was reduced. That's why I suggest the post title as "Hibernating changes to sleep behaviour" because the battery level reduction looks like sleep behaviour.

Please inform me of any diagnostics information you might need. Thank you for your kind assistance.