IBM Support

PowerVC VM Console Known Issues and Limitations

Troubleshooting


Problem

Multiple known issues and limitations exist with PowerVC VM console functionality related to clipboard operations, terminal settings, and browser compatibility.

Symptom

Users may experience one or more of the following issues when using PowerVC VM console:

  1. Extra escape sequences (^[[200~ and ~) appearing when pasting commands in RHEL 9.x VMs
  2. JavaScript/Java code with leading comments getting all lines commented when pasted
  3. Console session disconnecting when PowerVC services restart on NovaLink hosts
  4. Chrome browser becoming unresponsive when accessing VM console on Intel-based Mac systems

Cause

These issues arise from different sources:

  1. Extra characters (RHEL 9.x): Related to RHEL 9 OS terminal settings for bracketed paste mode
  2. Code comment prefixing: Terminal interpretation of pasted content with leading comment syntax
  3. Session expiry: Expected behavior when PowerVC services restart, terminating active VNC connections
  4. Chrome browser hang: Chrome v142+ WebGPU optimizations affecting NoVNC Canvas 2D rendering on Intel Mac

Environment

Affected Configurations:

PowerVC Version: 2.3.2 and above
Browsers: Chrome, Edge, Firefox (Chrome v142+ specific issue on Intel Mac)
Host Systems: Linux, Windows, macOS

Resolving The Problem

Issue 1: Extra Characters When Pasting (RHEL 9.x)

This is related to RHEL OS terminal settings.

For more information, refer OS docs:

https://docs.redhat.com/en/documentation/red_hat_enterprise_linux/9/html/9.0_release_notes/new-features#enhancement_shells-and-command-line-tools

 

Issue 2: Code Pasting with Leading Comments

This is caused by terminal interpretation of pasted content. Use one of these workarounds:

Option 1: Use different file extension

vim code.txt
# Paste your code
mv code.txt code.js

Option 2: Remove leading comments temporarily

  1. Remove leading comment lines before copying
  2. Paste the code
  3. Add comments back manually

 

Issue 3: Console Session Expires After Service Restart

This is expected behavior when PowerVC services restart on NovaLink hosts.
Note: Auto-reconnect only handles network interruptions, not service restarts

 

Issue 4: Chrome Browser Performance (Intel Mac)

Disable hardware graphics acceleration in Chrome:

  1. Open Chrome Settings -> System
  2. Disable "Use graphics acceleration when available"
  3. Restart Chrome

Alternative: Use Chrome v140 or different browsers (Firefox/Edge)

 

Document Location

Worldwide

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Product Synonym

IBM PowerVC; PowerVC for Private Cloud

Document Information

Modified date:
05 December 2025

UID

ibm17252377

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