Red Hat Bugzilla – Bug 1290886
[i915] WARNING drivers/gpu/drm/i915/intel_display.c:1880 vlv_wait_port_ready+0x121/0x160
Last modified: 2016-12-20 11:56:07 EST
Created attachment 1104759 [details]
Description of problem:
I unplugged a USB keyboard on an Intel NUC and got a series of call traces related to i915. NUC is connected to a display via HDMI but the display was off at the time, the NUC was being used effectively headless.
Version-Release number of selected component (if applicable):
Rebooted with the keyboard attached, waited a few minutes, removed it. No trace.
Steps to Reproduce:
[40721.305434] usb 1-1: USB disconnect, device number 2
[40721.305464] usb 1-1.2: USB disconnect, device number 4
[40722.513280] ------------[ cut here ]------------
[40722.513428] WARNING: CPU: 3 PID: 28943 at drivers/gpu/drm/i915/intel_display.c:1880 vlv_wait_port_ready+0x121/0x160 [i915]()
[40722.513435] timed out waiting for port D ready: got 0xf, expected 0x0
Created attachment 1104787 [details]
Created attachment 1105132 [details]
Plugged the keyboard in maybe an hour after a reboot, same traceback. And it kills the display (HDMI) as well, so not good.
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