<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <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 <a class="email" href="mailto:mmokrejs@gmail.com" title="mmokrejs@fold.natur.cuni.cz <mmokrejs@gmail.com>"> mmokrejs@fold.natur.cuni.cz</a> <pre>Created <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> 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> </div> <hr> You are receiving this mail because: <ul> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>