Problem with dual display, with Intel i915 driver giving kernel errors in Red Hat Enterprise Linux

Solution Verified - Updated -

Issue

  • The DVI monitor functions correctly, however no signal comes through on the VGA KVM monitor.
  • On changing KVM inputs (pressing another workstation) and then pressing "Auto" get display output.
  • The KVM monitor then loses signal and goes black.
  • For the Auto moment the VGA monitor works, and following error messages are logged in
    /var/log/messages and dmesg saying:
[drm:pch_irq_handler] *ERROR* PCH poison interrupt

Environment

On a RHEL 6.3 workstation. The overall setup is
- Intel i7 2600k (Intel onboard graphics 3000 i915)
- Acme SMK980 kvm monitor (plugged into VGA port)
- External 19" Dell monitor (plugged into DVI port)
- Tested on 2.6.32-279.5.2.el6.x86_64 and 2.6.32-279.11.1.el6.x86_64

Subscriber exclusive content

A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.

Current Customers and Partners

Log in for full access

Log In

New to Red Hat?

Learn more about Red Hat subscriptions

Using a Red Hat product through a public cloud?

How to access this content