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NI-Serial 2024 Q3 Known Issues

Updated Nov 19, 2024

Overview

This document contains the NI-Serial known issues that were discovered before and since the release of NI-Serial 2024 Q3. Known issues are performance issues or technical bugs that NI has acknowledged exist within this version of the product.

 

Not every issue known to NI appears on this list; it is intended to show the most severe and common issues that you may encounter and provide workarounds when possible. Other technical issues that you may encounter could occur through normal product use or system compatibility issues. You may find more information on these issues in NI’s Product Documentation, Knowledgebase, or Community; see Additional Resources.

Bug Number

Legacy ID

Description

Details
1377894, 1628780

NI-VISA does not support Serial DTR/DSR flow control on Linux

The DTR/DSR flow control mechanism is not supported in a standard way by the Linux Operating System.

Workaround:

There is currently no known workaround for this issue.

Reported Version:

NI-VISA: 19.0

Resolved Version:

N/A

Added:

Oct 21, 2021
1347185, 1628768

NI-VISA doesn't support Serial DTR controlled transceiver modes on Linux

RS-485 Serial ports typically support several transceiver modes. However, NI-VISA only supports the following two modes on Linux:
  • 4-Wire
  • 2-Wire Auto

Workaround:

There is currently no known workaround for this issue.

Reported Version:

NI-VISA: 19.0

Resolved Version:

N/A

Added:

Oct 21, 2021
1210589, 2256290

NI Drivers may fail under Linux kernel DMA remapping

Attempts to use NI devices may fail on Linux kernels that have enabled DMA remapping.  The Linux kernel logs will contain errors similar to the following:
DMAR: [DMA Read NO_PASID] Request device [06:00.0] fault addr 0xb8441000 [fault reason 0x06] PTE Read access is not set
Linux distributions that enable DMA remapping by default include Ubuntu 22.04 with kernel 6.8 or higher and Ubuntu 24.04.

Workaround:

Modify the Linux kernel DMA remapping configuration as outlined in https://www.ni.com/r/iommu-linux.

Reported Version:

NI Linux Device Drivers: 2020 | NI-Serial: 20.0

Resolved Version:

N/A

Added:

Oct 25, 2024
2840969

NI-Serial products (843x) installed with NI-Serial 2024 Q3 release can not support Ubuntu 24.04

NI-Serial products (843x) installed with NI-Serial 2024 Q3 release can not support Ubuntu 24.04.
After NI-Serial is successfully installed into Ubuntu 24.04, serial ports are non-functional and users will not see any serial ports when they run "lsni"


Workaround:

Currently no known workaround for this issue. 
User will need to install NI-Serial 2025 Q1 release and beyond to enable NI-Serial products (843x) with Ubuntu 24.04.

Reported Version:

NI Linux Device Drivers: 2023 Q4 | NI-Serial: 2024 Q3

Resolved Version:

NI-Serial: 2025 Q1

Added:

Oct 25, 2024

Final Time Issue Listed

Issues found in this section will not be listed in future known issues documents for this product.

There are currently no issues to list.

Additional Resources

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Glossary of Terms

 

  • Bug ID - When an issue is reported to NI, you may be given this ID or find it on ni.com.  You may also find IDs posted by NI on the discussion forums or in KnowledgeBase articles.
  • Legacy ID – An older issue ID that refers to the same issue.  You may instead find this issue ID in older known issues documents.
  • Description - A few sentences which describe the problem. The brief description given does not necessarily describe the problem in full detail.
  • Workaround - Possible ways to work around the problem.
  • Reported Version - The earliest version in which the issue was reported.
  • Resolved Version - Version in which the issue was resolved or was no longer applicable. "N/A" indicates that the issue has not been resolved.
  • Date Added - The date the issue was added to the document (not the reported date).