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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - linux-5.1.19: i915 when ext HDMI is connected triggers too many interrupts and high load"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111180#c9">Comment # 9</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - linux-5.1.19: i915 when ext HDMI is connected triggers too many interrupts and high load"
href="https://bugs.freedesktop.org/show_bug.cgi?id=111180">bug 111180</a>
from <span class="vcard"><a class="email" href="mailto:mmokrejs@gmail.com" title="mmokrejs@fold.natur.cuni.cz <mmokrejs@gmail.com>"> <span class="fn">mmokrejs@fold.natur.cuni.cz</span></a>
</span></b>
<pre>Created <span class=""><a href="attachment.cgi?id=144854" name="attach_144854" title="dmesg-5.3.0-rc1-drm-tip.txt">attachment 144854</a> <a href="attachment.cgi?id=144854&action=edit" title="dmesg-5.3.0-rc1-drm-tip.txt">[details]</a></span>
dmesg-5.3.0-rc1-drm-tip.txt
The CPU fan runs at lower speed although still is not ideal. It can be turned
off completely (actually get turned off if I unplug the HDMI cable). I still
see the errors in the dmesg output so I am not surprised the system is bothered
by interrupts to some extent. But it is definitely better than 5.1.19 and the
other kernels I tried.
What I tested now is:
# git log | head
commit efc5709a1e0f5050b197b51c3fce4cbcc95fe319
Author: Daniel Vetter <<a href="mailto:daniel.vetter@ffwll.ch">daniel.vetter@ffwll.ch</a>>
Date: Tue Jul 23 11:11:03 2019 +0200
drm-tip: 2019y-07m-23d-09h-10m-12s UTC integration manifest
# 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 64 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 229235 IR-PCI-MSI 32768-edge i915
32: 0 0 IR-PCI-MSI 360448-edge mei_me
33: 0 20477 IR-PCI-MSI 512000-edge ahci[0000:00:1f.2]
34: 842 0 IR-PCI-MSI 2621440-edge p1p1
35: 0 5606 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: 133679 48455 Local timer interrupts
SPU: 0 0 Spurious interrupts
PMI: 0 0 Performance monitoring interrupts
IWI: 1 349 IRQ work interrupts
RTR: 0 0 APIC ICR read retries
RES: 46357 32603 Rescheduling interrupts
CAL: 18434 7871 Function call interrupts
TLB: 17100 17878 TLB shootdowns
TRM: 0 0 Thermal event interrupts
THR: 0 0 Threshold APIC interrupts
MCE: 0 0 Machine check exceptions
MCP: 2 3 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
# w
14:37:53 up 8 min, 2 users, load average: 0.44, 0.62, 0.37
...
# lspci -vvv -s 00:02.0
00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core
Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA
controller])
Subsystem: Dell 2nd Generation Core Processor Family Integrated
Graphics Controller
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0
Interrupt: pin A routed to IRQ 31
Region 0: Memory at f6800000 (64-bit, non-prefetchable) [size=4M]
Region 2: Memory at e0000000 (64-bit, prefetchable) [size=256M]
Region 4: I/O ports at f000 [size=64]
[virtual] Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
Address: fee00018 Data: 0000
Capabilities: [d0] Power Management version 2
Flags: PMEClk- DSI+ D1- D2- AuxCurrent=0mA
PME(D0-,D1-,D2-,D3hot-,D3cold-)
Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
Capabilities: [a4] PCI Advanced Features
AFCap: TP+ FLR+
AFCtrl: FLR-
AFStatus: TP-
Kernel driver in use: i915</pre>
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