Intel Connectivity Performance Suite blamed for broken IPv6 connections

Users are reporting strange IPv6 networking behavior that they have traced to the Intel Connectivity Performance Suite (ICPS), a wireless optimization utility that ships preinstalled on many OEM laptops. The chipmaker has not publicly acknowledged the problem.

Symptoms and user reports

A Samsung Galaxy Book owner contacted The Register after experiencing odd behavior in OneDrive and OneNote, where notebooks appeared empty despite being marked as up to date. Microsoft support could not resolve the issue. Investigation revealed that something was interfering with IPv6 packets. Removing Samsung's ICPS build (version 40.25.926.0) and installing the generic release (50.26.623.243) fixed the problem.

According to the reader, the issue presents as random connection reset errors on various websites, along with OneNote messages stating that notebooks cannot be reached. IPv4 connectivity remains unaffected, which is why web versions of services and phones continued to work, leaving support staff puzzled.

Intel's own Community forums contain similar reports. An ASUS user documented an exhaustive case in which ICPS version 40.25.725.165 caused intermittent IPv6 connection failures while IPv4 worked normally. For that user, approximately 40 to 60 percent of IPv6 HTTPS connections to an AWS CloudFront distribution were reset, affecting Chrome, Edge, and Windows curl.exe. Uninstalling ICPS resolved the issue.

Workarounds and Intel's response

When the ASUS user asked whether there was an official way to opt out of ICPS permanently, an Intel Customer Support Technician confirmed that the wireless driver and ICPS are available as separate standalone driver packages. The technician explained that ICPS is often bundled with OEM systems as added value software intended to enhance the wireless experience, though for affected users it does the opposite.

The reader who contacted The Register stated that Intel created the bug and then fixed it quietly. Updating to the later generic version appears to resolve the problem. However, the Intel technician noted as of the July forum post that there was no confirmed public advisory for the specific behavior. Broken ICPS builds remain in circulation, and Microsoft's Update Catalog has been distributing the faulty drivers, effectively breaking Microsoft 365 services on certain hardware.

Neither Intel nor Microsoft responded to requests for comment. Forum comments suggest the issue has affected a significant number of users.

Advice for affected users

Users experiencing unexplained IPv6 networking issues who have ICPS installed are advised to try the generic version of the software rather than the OEM build, or to remove it entirely, to see whether the problem disappears.

Sources: Theregister