Surface Laptop Studio 2: intermittent 1–2s freezes

[tehranixyz]

Summary

I am running Ubuntu on a Microsoft Surface Laptop Studio 2, and the system intermittently freezes for short periods (~1–2 seconds). During each freeze, all input appears to pause, and then once the system resumes, the mouse cursor jumps and keyboard input appears to have been buffered and replayed. Sometimes, after the freeze ends, a key repeats several times (e.g. characters keep repeating briefly).

This happens during normal usage and is noticeable as short UI stalls.

Device / Hardware

• Hardware Vendor: Microsoft Corporation
• Hardware Model: Surface Laptop Studio 2
• Firmware Version: 21.109.143
• Firmware Date: 2025-03-13

OS / Kernel

• Operating System: Ubuntu 24.04.3 LTS
• Kernel: Linux 6.18.4-surface-1
• Architecture: x86-64

Problem description

Observed behavior

• Random micro-freezes for ~1–2 seconds
• During freeze:
  • mouse stops responding
  • keyboard input does not appear immediately
• After freeze:
  • mouse cursor jumps
  • keyboard input appears to be replayed/buffered
  • sometimes a key continues repeating briefly after the freeze ends

Frequency / Impact

The freezes happen intermittently during normal desktop use.
The system recovers automatically, but the repeated freezes disrupt typing and general interaction.

If there are specific tracing steps (ftrace, perf, kernel parameters, debug builds) that would help isolate the stall, I can test and report back.