Hi all,
I've just set up a new T480 ThinkPad with OpenBSD 7.4. I have noticed
that after sleeping (by closing and opening the lid of the laptop)
my fan turns up and one of my CPU cores is fully loaded. `top -U -S
root` and `systat vmstat` tell me, that acpi0 is generating a lot of
interrupts, close to 2000/s.

Once I had this high interrupt count directly after booting, without
even putting the laptop to sleep.

Can anyone help me debug this or does someone know of a workaround?
>From what I've read I could probably disable certain ACPI functions
using bsd.re-config(5), but I'm not sure where to start. Do I have to go
through all 49 devices listed in acpi(4)?

Greetings,
Richard


dmesg; the last 22 lines were generated when closing and opening the
lid:

OpenBSD 7.4 (GENERIC.MP) #1397: Tue Oct 10 09:02:37 MDT 2023
    dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 8200216576 (7820MB)
avail mem = 7931973632 (7564MB)
random: good seed from bootblocks
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 3.0 @ 0x9a628000 (63 entries)
bios0: vendor LENOVO version "N24ET74W (1.49 )" date 08/15/2023
bios0: LENOVO 20L6SF8C00
acpi0 at bios0: ACPI 5.0
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP SSDT SSDT TPM2 UEFI SSDT SSDT HPET APIC MCFG ECDT SSDT 
SSDT SSDT BOOT BATB SLIC SSDT SSDT SSDT LPIT WSMT SSDT SSDT SSDT DBGP DBG2 MSDM 
DMAR ASF! FPDT UEFI
acpi0: wakeup devices GLAN(S4) XHC_(S3) XDCI(S4) HDAS(S4) RP01(S4) PXSX(S4) 
RP02(S4) PXSX(S4) RP03(S4) PXSX(S4) RP04(S4) PXSX(S4) RP05(S4) PXSX(S4) 
RP06(S4) PXSX(S4) [...]
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpihpet0 at acpi0: 23999999 Hz
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz, 1496.52 MHz, 06-8e-0a, patch 
000000f4
cpu0: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SRBDS_CTRL,MD_CLEAR,TSXFA,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,RSBA,MISC_PKG_CT,ENERGY_FILT,GDS_CTRL,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN
cpu0: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB 64b/line 
4-way L2 cache, 6MB 64b/line 12-way L3 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges
cpu0: apic clock running at 24MHz
cpu0: mwait min=64, max=64, C-substates=0.2.1.2.4.1.1.1, IBE
cpu1 at mainbus0: apid 2 (application processor)
cpu1: Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz, 1496.52 MHz, 06-8e-0a, patch 
000000f4
cpu1: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SRBDS_CTRL,MD_CLEAR,TSXFA,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,RSBA,MISC_PKG_CT,ENERGY_FILT,GDS_CTRL,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN
cpu1: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB 64b/line 
4-way L2 cache, 6MB 64b/line 12-way L3 cache
cpu1: smt 0, core 1, package 0
cpu2 at mainbus0: apid 4 (application processor)
cpu2: Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz, 1496.52 MHz, 06-8e-0a, patch 
000000f4
cpu2: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SRBDS_CTRL,MD_CLEAR,TSXFA,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,RSBA,MISC_PKG_CT,ENERGY_FILT,GDS_CTRL,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN
cpu2: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB 64b/line 
4-way L2 cache, 6MB 64b/line 12-way L3 cache
cpu2: smt 0, core 2, package 0
cpu3 at mainbus0: apid 6 (application processor)
cpu3: Intel(R) Core(TM) i5-8250U CPU @ 1.60GHz, 1496.52 MHz, 06-8e-0a, patch 
000000f4
cpu3: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,EST,TM2,SSSE3,SDBG,FMA3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,ITSC,FSGSBASE,TSC_ADJUST,SGX,BMI1,AVX2,SMEP,BMI2,ERMS,INVPCID,MPX,RDSEED,ADX,SMAP,CLFLUSHOPT,PT,SRBDS_CTRL,MD_CLEAR,TSXFA,IBRS,IBPB,STIBP,L1DF,SSBD,SENSOR,ARAT,RSBA,MISC_PKG_CT,ENERGY_FILT,GDS_CTRL,XSAVEOPT,XSAVEC,XGETBV1,XSAVES,MELTDOWN
cpu3: 32KB 64b/line 8-way D-cache, 32KB 64b/line 8-way I-cache, 256KB 64b/line 
4-way L2 cache, 6MB 64b/line 12-way L3 cache
cpu3: smt 0, core 3, package 0
ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 120 pins
acpimcfg0 at acpi0
acpimcfg0: addr 0xf8000000, bus 0-63
acpiec0 at acpi0
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus 1 (RP01)
acpiprt2 at acpi0: bus -1 (RP02)
acpiprt3 at acpi0: bus -1 (RP03)
acpiprt4 at acpi0: bus -1 (RP04)
acpiprt5 at acpi0: bus -1 (RP05)
acpiprt6 at acpi0: bus -1 (RP06)
acpiprt7 at acpi0: bus 3 (RP07)
acpiprt8 at acpi0: bus -1 (RP08)
acpiprt9 at acpi0: bus 4 (RP09)
acpiprt10 at acpi0: bus -1 (RP10)
acpiprt11 at acpi0: bus 61 (RP11)
acpiprt12 at acpi0: bus -1 (RP12)
acpiprt13 at acpi0: bus -1 (RP13)
acpiprt14 at acpi0: bus -1 (RP14)
acpiprt15 at acpi0: bus -1 (RP15)
acpiprt16 at acpi0: bus -1 (RP16)
acpiprt17 at acpi0: bus -1 (RP17)
acpiprt18 at acpi0: bus -1 (RP18)
acpiprt19 at acpi0: bus -1 (RP19)
acpiprt20 at acpi0: bus -1 (RP20)
acpiprt21 at acpi0: bus -1 (RP21)
acpiprt22 at acpi0: bus -1 (RP22)
acpiprt23 at acpi0: bus -1 (RP23)
acpiprt24 at acpi0: bus -1 (RP24)
acpipci0 at acpi0 PCI0: 0x00000000 0x00000011 0x00000001
acpithinkpad0 at acpi0: version 2.0
acpiac0 at acpi0: AC unit online
acpibat0 at acpi0: BAT0 not present
acpibat1 at acpi0: BAT1 model "01AV425" serial  3389 type LION oem "SANYO"
"LEN0100" at acpi0 not configured
"INT3403" at acpi0 not configured
acpicmos0 at acpi0
acpibtn0 at acpi0: SLPB(wakeup)
"PNP0C14" at acpi0 not configured
acpibtn1 at acpi0: LID_(wakeup)
"PNP0C14" at acpi0 not configured
"PNP0C14" at acpi0 not configured
"PNP0C14" at acpi0 not configured
"INT3400" at acpi0 not configured
tpm0 at acpi0 TPM_ 2.0 (TIS) addr 0xfed40000/0x5000, device 0x001b15d1 rev 0x10
"USBC000" at acpi0 not configured
acpicpu0 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33), 
C1(1000@1 mwait.1), PSS
acpicpu1 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33), 
C1(1000@1 mwait.1), PSS
acpicpu2 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33), 
C1(1000@1 mwait.1), PSS
acpicpu3 at acpi0: C3(200@1034 mwait.1@0x60), C2(200@151 mwait.1@0x33), 
C1(1000@1 mwait.1), PSS
acpipwrres0 at acpi0: PUBS, resource for XHC_
acpipwrres1 at acpi0: PXP_, resource for RP09
acpitz0 at acpi0: critical temperature is 128 degC
acpivideo0 at acpi0: GFX0
acpivout0 at acpivideo0: DD1F
cpu0: using VERW MDS workaround (except on vmm entry)
cpu0: Enhanced SpeedStep 1496 MHz: speeds: 1801, 1800, 1700, 1600, 1500, 1400, 
1300, 1200, 1100, 1000, 900, 800, 700, 600, 500, 400 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Core 8G Host" rev 0x08
inteldrm0 at pci0 dev 2 function 0 "Intel UHD Graphics 620" rev 0x07
drm0 at inteldrm0
inteldrm0: msi, KABYLAKE, gen 9
"Intel Core 6G Thermal" rev 0x08 at pci0 dev 4 function 0 not configured
"Intel Core GMM" rev 0x00 at pci0 dev 8 function 0 not configured
xhci0 at pci0 dev 20 function 0 "Intel 100 Series xHCI" rev 0x21: msi, xHCI 1.0
usb0 at xhci0: USB revision 3.0
uhub0 at usb0 configuration 1 interface 0 "Intel xHCI root hub" rev 3.00/1.00 
addr 1
pchtemp0 at pci0 dev 20 function 2 "Intel 100 Series Thermal" rev 0x21
"Intel 100 Series MEI" rev 0x21 at pci0 dev 22 function 0 not configured
ppb0 at pci0 dev 28 function 0 "Intel 100 Series PCIE" rev 0xf1: msi
pci1 at ppb0 bus 1
ppb1 at pci0 dev 28 function 6 "Intel 100 Series PCIE" rev 0xf1: msi
pci2 at ppb1 bus 3
iwm0 at pci2 dev 0 function 0 "Intel Dual Band Wireless-AC 8265" rev 0x78, msi
ppb2 at pci0 dev 29 function 0 "Intel 100 Series PCIE" rev 0xf1: msi
pci3 at ppb2 bus 4
ppb3 at pci3 dev 0 function 0 "Intel JHL6240 Thunderbolt 3" rev 0x01
pci4 at ppb3 bus 5
ppb4 at pci4 dev 0 function 0 "Intel JHL6240 Thunderbolt 3" rev 0x01: msi
pci5 at ppb4 bus 6
"Intel JHL6240 Thunderbolt 3" rev 0x01 at pci5 dev 0 function 0 not configured
ppb5 at pci4 dev 1 function 0 "Intel JHL6240 Thunderbolt 3" rev 0x01: msi
pci6 at ppb5 bus 7
ppb6 at pci4 dev 2 function 0 "Intel JHL6240 Thunderbolt 3" rev 0x01: msi
pci7 at ppb6 bus 60
xhci1 at pci7 dev 0 function 0 "Intel JHL6240 Thunderbolt 3" rev 0x01: msi, 
xHCI 1.10
usb1 at xhci1: USB revision 3.0
uhub1 at usb1 configuration 1 interface 0 "Intel xHCI root hub" rev 3.00/1.00 
addr 1
ppb7 at pci0 dev 29 function 2 "Intel 100 Series PCIE" rev 0xf1: msi
pci8 at ppb7 bus 61
nvme0 at pci8 dev 0 function 0 vendor "Lenovo", unknown product 0x0005 rev 
0x00: msix, NVMe 1.2
nvme0: LENSE30256GMSP34MEAT3TA, firmware 2.5.0412, serial FBFB19060Y80002855
scsibus1 at nvme0: 2 targets, initiator 0
sd0 at scsibus1 targ 1 lun 0: <NVMe, LENSE30256GMSP34, 2.5.>
sd0: 244198MB, 512 bytes/sector, 500118192 sectors
pcib0 at pci0 dev 31 function 0 "Intel 200 Series LPC" rev 0x21
"Intel 100 Series PMC" rev 0x21 at pci0 dev 31 function 2 not configured
azalia0 at pci0 dev 31 function 3 "Intel 200 Series HD Audio" rev 0x21: msi
azalia0: codecs: Realtek ALC257, Intel/0x280b, using Realtek ALC257
audio0 at azalia0
ichiic0 at pci0 dev 31 function 4 "Intel 100 Series SMBus" rev 0x21: apic 2 int 
16
iic0 at ichiic0
em0 at pci0 dev 31 function 6 "Intel I219-V" rev 0x21: msi, address 
98:fa:9b:6c:d4:df
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard
pms0 at pckbc0 (aux slot)
wsmouse0 at pms0 mux 0
wsmouse1 at pms0 mux 0
pms0: Synaptics clickpad, firmware 8.16, 0x1e2b1 0x940300 0x33cc40 0xf016a3 
0x12e800
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
vmm0 at mainbus0: VMX/EPT
ugen0 at uhub0 port 3 "Generic EMV Smartcard Reader" rev 2.01/1.20 addr 2
ugen1 at uhub0 port 7 "Intel Bluetooth" rev 2.00/0.10 addr 3
uvideo0 at uhub0 port 8 configuration 1 interface 0 "Azurewave Integrated 
Camera" rev 2.01/17.11 addr 4
video0 at uvideo0
umass0 at uhub0 port 15 configuration 1 interface 0 "Generic USB3.0-CRW" rev 
3.00/2.04 addr 5
umass0: using SCSI over Bulk-Only
scsibus2 at umass0: 2 targets, initiator 0
sd1 at scsibus2 targ 1 lun 0: <Generic-, SD/MMC, 1.00> removable 
serial.0bda0316501030900000
vscsi0 at root
scsibus3 at vscsi0: 256 targets
softraid0 at root
scsibus4 at softraid0: 256 targets
sd2 at scsibus4 targ 1 lun 0: <OPENBSD, SR CRYPTO, 006>
sd2: 244198MB, 512 bytes/sector, 500117600 sectors
root on sd2a (a333c5c22f2381c8.a) swap on sd2b dump on sd2b
drm:pid0:intel_ddi_sanitize_encoder_pll_mapping *NOTICE* [drm] [ENCODER:102:DDI 
B/PHY B] is disabled/in DSI mode with an ungated DDI clock, gate it
drm:pid0:intel_ddi_sanitize_encoder_pll_mapping *NOTICE* [drm] [ENCODER:116:DDI 
C/PHY C] is disabled/in DSI mode with an ungated DDI clock, gate it
inteldrm0: 1920x1080, 32bpp
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation), using wskbd0
wsdisplay0: screen 1-5 added (std, vt100 emulation)
iwm0: hw rev 0x230, fw ver 36.ca7b901d.0, address 24:ee:9a:eb:42:9a
ugen0 detached
ugen1 detached
video0 detached
uvideo0 detached
sd1 detached
scsibus2 detached
umass0 detached
uhub0 detached
uhub1 detached
uhub0 at usb0 configuration 1 interface 0 "Intel xHCI root hub" rev 3.00/1.00 
addr 1
uhub1 at usb1 configuration 1 interface 0 "Intel xHCI root hub" rev 3.00/1.00 
addr 1
ugen0 at uhub0 port 3 "Generic EMV Smartcard Reader" rev 2.01/1.20 addr 2
ugen1 at uhub0 port 7 "Intel Bluetooth" rev 2.00/0.10 addr 3
drm:pid24883:intel_ddi_sanitize_encoder_pll_mapping *NOTICE* [drm] 
[ENCODER:94:DDI A/PHY A] is disabled/in DSI mode with an ungated DDI clock, 
gate it
drm:pid24883:intel_ddi_sanitize_encoder_pll_mapping *NOTICE* [drm] 
[ENCODER:102:DDI B/PHY B] is disabled/in DSI mode with an ungated DDI clock, 
gate it
drm:pid24883:intel_ddi_sanitize_encoder_pll_mapping *NOTICE* [drm] 
[ENCODER:116:DDI C/PHY C] is disabled/in DSI mode with an ungated DDI clock, 
gate it
uvideo0 at uhub0 port 8 configuration 1 interface 0 "Azurewave Integrated 
Camera" rev 2.01/17.11 addr 4
video0 at uvideo0
umass0 at uhub0 port 15 configuration 1 interface 0 "Generic USB3.0-CRW" rev 
3.00/2.04 addr 5
umass0: using SCSI over Bulk-Only
scsibus2 at umass0: 2 targets, initiator 0
sd1 at scsibus2 targ 1 lun 0: <Generic-, SD/MMC, 1.00> removable 
serial.0bda0316501030900000

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