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Message-ID: <68a6e356-a53e-4bc2-8f5c-4ab36c0c3349@molgen.mpg.de> Date: Thu, 22 Feb 2024 16:59:03 +0100 From: Paul Menzel <pmenzel@...gen.mpg.de> To: Jarkko Nikula <jarkko.nikula@...ux.intel.com> 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 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. 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? Could Linux detect this situation and log something? Kind regards, Paul [1]: https://bugzilla.kernel.org/show_bug.cgi?id=218465
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