[Bug 111180] linux-5.1.19: i915 when ext HDMI is connected triggers too many interrupts and high load

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111180

--- Comment #6 from mmokrejs at fold.natur.cuni.cz <mmokrejs at gmail.com> ---
Created attachment 144847
  --> https://bugs.freedesktop.org/attachment.cgi?id=144847&action=edit
dmesg-5.1.19__HDMI_cable_pulled_out.txt

In this dmesg you cann see the errors and somewhere you can find where I pulled
out the HDMI cable. Then, withing a few seconds CPU fan speeds went down, and I
assume temperature as well.

$ cat /proc/interrupts 
           CPU0       CPU1       
  0:          6          0  IR-IO-APIC   2-edge      timer
  1:         17          0  IR-IO-APIC   1-edge      i8042
  8:          0          1  IR-IO-APIC   8-edge      rtc0
  9:          0          4  IR-IO-APIC   9-fasteoi   acpi
 12:          0          0  IR-IO-APIC  12-edge      i8042
 16:         82          0  IR-IO-APIC  16-fasteoi   ehci_hcd:usb1
 18:          0          0  IR-IO-APIC  18-fasteoi   i801_smbus
 23:          0         65  IR-IO-APIC  23-fasteoi   ehci_hcd:usb2
 24:          0          0  DMAR-MSI   0-edge      dmar0
 25:          0          0  DMAR-MSI   1-edge      dmar1
 30:          0          0  IR-PCI-MSI 473088-edge      pciehp
 31:          0   34727931  IR-PCI-MSI 32768-edge      i915
 32:          0          0  IR-PCI-MSI 360448-edge      mei_me
 33:          0      97197  IR-PCI-MSI 512000-edge      ahci[0000:00:1f.2]
 34:     114753          0  IR-PCI-MSI 2621440-edge      p1p1
 35:          0     207816  IR-PCI-MSI 5767168-edge      xhci_hcd
 36:          0          0  IR-PCI-MSI 5767169-edge      xhci_hcd
 37:          0          0  IR-PCI-MSI 5767170-edge      xhci_hcd
 38:          0          0  IR-PCI-MSI 5767171-edge      xhci_hcd
 39:          0          0  IR-PCI-MSI 5767172-edge      xhci_hcd
 40:          0          0  IR-PCI-MSI 442368-edge      snd_hda_intel:card0
 41:          0          1  IR-PCI-MSI 4718592-edge      iwlwifi
NMI:          0          0   Non-maskable interrupts
LOC:   12587184   10611394   Local timer interrupts
SPU:          0          0   Spurious interrupts
PMI:          0          0   Performance monitoring interrupts
IWI:        144       7182   IRQ work interrupts
RTR:          0          0   APIC ICR read retries
RES:    4603868    2600550   Rescheduling interrupts
CAL:     182044     122334   Function call interrupts
TLB:     488674     456196   TLB shootdowns
TRM:      37098      37101   Thermal event interrupts
THR:          0          0   Threshold APIC interrupts
MCE:          0          0   Machine check exceptions
MCP:         50         51   Machine check polls
ERR:          0
MIS:          0
PIN:          0          0   Posted-interrupt notification event
NPI:          0          0   Nested posted-interrupt event
PIW:          0          0   Posted-interrupt wakeup event
$

Uptime 4hrs 9min.

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