Re: Performance regression with debug logs spammed with lots of warnings/errors

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On Sun, 30 Jul 2017, Greg Stark <stark@xxxxxxx> wrote:
> On 30 July 2017 at 13:23, Greg Stark <stark@xxxxxxx> wrote:
>
>> [drm:i915_hotplug_work_func [i915]] running encoder hotplug functions
>> Jul 30 13:17:17 pixel kernel: [ 3221.929831]
>> [drm:i915_hotplug_work_func [i915]] Connector HDMI-A-1 (pin 7)
>> received hotplug event.
>> Jul 30 13:17:17 pixel kernel: [ 3221.929850] [drm:intel_hdmi_detect
>> [i915]] [CONNECTOR:57:HDMI-A-1]
>> Jul 30 13:17:17 pixel kernel: [ 3221.935918] [drm:intel_get_hpd_pins
>> [i915]] hotplug event received, stat 0x00800000, dig 0x00111010, pins
>> 0x00000080
>> Jul 30 13:17:17 pixel kernel: [ 3221.935936]
>> [drm:intel_hpd_irq_handler [i915]] digital hpd port D - short
>
> Hm. This looks like a false alarm. I disconnected and reconnected the
> miniDP cable from the cheap chinese adapter to the monitor and these
> immediately stopped. My guess is that on powerup the chips in the
> adapter didn't quite reach a stable state and were generating these
> spurious events.

Plausible.

If this keeps happening, please file a bug over at
https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel

BR,
Jani.

-- 
Jani Nikula, Intel Open Source Technology Center
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