[Bug 106675] New: [drm] HPD interrupt storm detected on connector HDMI-A-1 : switching from hotplug detection to polling

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106675

            Bug ID: 106675
           Summary: [drm] HPD interrupt storm detected on connector
                    HDMI-A-1 : switching from hotplug detection to polling
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: aether at disroot.org
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Bug description: After X starts, this message apepars randomly in dmesg :

[drm] HPD interrupt storm detected on connector HDMI-A-1 : switching from
hotplug detection to polling

When it happens, the display freezes (including sound) for a few seconds,
sometimes more (to the point I'm forced to hard shutdown)

System environment:
-- chipset: GM45
-- system architecture: 64-bit
-- xf86-video-intel: 1:2.99.917-1 
-- xserver: 1.19.3
-- mesa: 2.1 Mesa 17.0.5
-- kernel: 4.9.102
-- Linux distribution: Hyperbola GNU/Linux
-- Machine or mobo model: Thinkpad T400 R8KMZN2
-- Display connector: Internal (LVDS) 1440x900

Reproducing steps: Start X, after a few seconds (or minutes), the display
freezes, when it happens, this message appears in dmesg :

[drm] HPD interrupt storm detected on connector HDMI-A-1 : switching from
hotplug detection to polling

Additional info: 

- T400 is running Libreboot bios, the issue happens with late KMS and early
KMS.

->>> Issue is not present with 4.16.12 kernel <<<-

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