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Date: Fri, 23 Feb 2024 12:09:49 +0200 From: Jarkko Nikula <jarkko.nikula@...ux.intel.com> To: Paul Menzel <pmenzel@...gen.mpg.de> Cc: linux-i2c@...r.kernel.org, LKML <linux-kernel@...r.kernel.org> Subject: Re: irq/51-DLL075B:01 in D state without touchpad usage, interrupts increase On 2/22/24 17:59, Paul Menzel wrote: > Dear Jarkko, > > > Thank you very much for your reply. > > Am 22.02.24 um 16:16 schrieb Jarkko Nikula: > >> On 2/20/24 18:15, Paul Menzel wrote: > >>> On a Dell XPS 13 9360 with Debian sid/unstable and Linux 6.8-rc4+ >>> (and probably before), I sometimes notice the fan spinning up, and >>> trying to figure out why, I noticed that `top` showed >>> `irq/51-DLL075B:01` in state D (uninterruptible sleep (usually IO)). >>> That is without using the touchpad. I am using an external USB >>> keyboard and an external USB mouse. >>> >>> >>> $ sudo dmesg | grep -e "DMI:" -e "Linux version" -e microcode >>> [ 0.000000] Linux version 6.8.0-rc4+ >>> (build@...emianrhapsody.molgen.mpg.de) (gcc (Debian 13.2.0-13) >>> 13.2.0, GNU ld (GNU Binutils for Debian) 2.42) #25 SMP >>> PREEMPT_DYNAMIC Sat Feb 17 05:39:03 CET 2024 >>> [ 0.000000] DMI: Dell Inc. XPS 13 9360/0596KF, BIOS 2.21.0 >>> 06/02/2022 >>> [ 0.367292] microcode: Current revision: 0x000000f4 >>> [ 0.367293] microcode: Updated early from: 0x000000f0 >>> >>> $ sudo dmesg | grep DLL075B >>> [ 0.967975] input: DLL075B:01 06CB:76AF Mouse as >>> /devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-2/i2c-DLL075B:01/0018:06CB:76AF.0001/input/input2 >>> [ 0.968302] input: DLL075B:01 06CB:76AF Touchpad as >>> /devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-2/i2c-DLL075B:01/0018:06CB:76AF.0001/input/input3 >>> [ 0.968569] hid-generic 0018:06CB:76AF.0001: input,hidraw0: >>> I2C HID v1.00 Mouse [DLL075B:01 06CB:76AF] on i2c-DLL075B:01 >>> [ 19.753775] input: DLL075B:01 06CB:76AF Mouse as >>> /devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-2/i2c-DLL075B:01/0018:06CB:76AF.0001/input/input17 >>> [ 19.753950] input: DLL075B:01 06CB:76AF Touchpad as >>> /devices/pci0000:00/0000:00:15.1/i2c_designware.1/i2c-2/i2c-DLL075B:01/0018:06CB:76AF.0001/input/input18 >>> [ 19.754654] hid-multitouch 0018:06CB:76AF.0001: >>> input,hidraw0: I2C HID v1.00 Mouse [DLL075B:01 06CB:76AF] on >>> i2c-DLL075B:01 >>> >>> From `top`: >>> >>> 206 root -51 0 0 0 0 D 1,7 0,0 >>> 8:45.46 irq/51-DLL075B:01 >>> >>> $ ps aux | grep 'irq/51' >>> root 206 0.2 0.0 0 0 ? D Feb17 >>> 12:11 [irq/51-DLL075B:01] >>> >>> The interrupts increase though by around 610 per second (without >>> using the device): >>> >>> $ for i in $(seq 1 10); do LANG= date; sudo grep -e '17:' -e >>> '51:' /proc/interrupts; sleep 1; done >>> Tue Feb 20 17:04:23 CET 2024 >>> 17: 1631256120 0 0 6452384 IR-IO-APIC >>> 17-fasteoi idma64.1, i2c_designware.1 >>> 51: 25255617 109943 0 0 IR-IO-APIC >>> 51-fasteoi DLL075B:01 >>> Tue Feb 20 17:04:27 CET 2024 >>> 17: 1631295844 0 0 6452384 IR-IO-APIC >>> 17-fasteoi idma64.1, i2c_designware.1 >>> 51: 25256229 109943 0 0 IR-IO-APIC >>> 51-fasteoi DLL075B:01 >>> Tue Feb 20 17:04:28 CET 2024 >>> 17: 1631335618 0 0 6452384 IR-IO-APIC >>> 17-fasteoi idma64.1, i2c_designware.1 >>> 51: 25256843 109943 0 0 IR-IO-APIC >>> 51-fasteoi DLL075B:01 >>> Tue Feb 20 17:04:29 CET 2024 >>> 17: 1631375224 0 0 6452384 IR-IO-APIC >>> 17-fasteoi idma64.1, i2c_designware.1 >>> 51: 25257454 109943 0 0 IR-IO-APIC >>> 51-fasteoi DLL075B:01 >>> Tue Feb 20 17:04:30 CET 2024 >>> 17: 1631415636 0 0 6452384 IR-IO-APIC >>> 17-fasteoi idma64.1, i2c_designware.1 >>> 51: 25258076 109943 0 0 IR-IO-APIC >>> 51-fasteoi DLL075B:01 >>> Tue Feb 20 17:04:31 CET 2024 >>> 17: 1631455174 0 0 6452384 IR-IO-APIC >>> 17-fasteoi idma64.1, i2c_designware.1 >>> 51: 25258687 109943 0 0 IR-IO-APIC >>> 51-fasteoi DLL075B:01 >>> Tue Feb 20 17:04:32 CET 2024 >>> 17: 1631494990 0 0 6452384 IR-IO-APIC >>> 17-fasteoi idma64.1, i2c_designware.1 >>> 51: 25259300 109943 0 0 IR-IO-APIC >>> 51-fasteoi DLL075B:01 >>> Tue Feb 20 17:04:33 CET 2024 >>> 17: 1631534944 0 0 6452384 IR-IO-APIC >>> 17-fasteoi idma64.1, i2c_designware.1 >>> 51: 25259915 109943 0 0 IR-IO-APIC >>> 51-fasteoi DLL075B:01 >>> Tue Feb 20 17:04:34 CET 2024 >>> 17: 1631574647 0 0 6452384 IR-IO-APIC >>> 17-fasteoi idma64.1, i2c_designware.1 >>> 51: 25260527 109943 0 0 IR-IO-APIC >>> 51-fasteoi DLL075B:01 >>> Tue Feb 20 17:04:35 CET 2024 >>> 17: 1631613552 0 0 6452384 IR-IO-APIC >>> 17-fasteoi idma64.1, i2c_designware.1 >>> 51: 25261130 109943 0 0 IR-IO-APIC >>> 51-fasteoi DLL075B:01 >>> >>> The D state increases the load average. >>> >>> Is that the expected behavior? >> >> No this is not. Touchpad appears to be firing interrupt line 51 >> continuously and then drivers/hid/i2c-hid/i2c-hid-core.c: >> i2c_hid_irq() is trying to read input from touchpad over I2C bus. >> >> Not sure is this HW failure or system FW error (there are bad ACPI >> tables out there misconfiguring things etc). > > It normally works, and I have no idea, if this even contributed to the > laggy system. Right now, the interrupts do not increase when *not* using > the touchpad or touchscreen. > Ah, so it triggers randomly? When it happens does the situation remain or does it recover back to normal somehow, e.g. after touching the touchpad, unloading and loading the i2c_hid[_acpi] module, suspend/resume cycle, etc? > If it helps, the output of `acpidump` is attached to the (unrelated) > Linux Kernel Bugzilla issue *Linux warning `usb: port power management > may be unreliable` on Dell XPS 13 9360* [1]. > > Do you have a suggestion, what I can do next time, this happens? > I'd try to see is it possible to recover back to normal or is reboot required. That might give ideas what might trigger the situation. > Could Linux detect this situation and log something? > Don't know. Perhaps difficult to differentiate from normal touchpad use.
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