[Bug 193500] Interrupt storm after loading i915kms module on Gen4 Intel GPU

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=193500

--- Comment #4 from jan.kokemueller at gmail.com ---
Created attachment 147255
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=147255&action=edit
output of "vmstat -i" for hw.drm.msi=0/1

With the opregion patch I get the "irq16: uhci0" line in the output of "vmstat
-i". Setting "hw.drm.msi" to 0 or 1 makes no difference. In both cases I get
about 220000 interrupts per second.

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