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Message-ID: <2bfe2311-27a6-46b5-8662-ba3cbb409f81@molgen.mpg.de>
Date: Tue, 21 Nov 2023 15:25:59 +0100
From: Paul Menzel <pmenzel@...gen.mpg.de>
To: Heikki Krogerus <heikki.krogerus@...ux.intel.com>
Cc: linux-usb@...r.kernel.org, LKML <linux-kernel@...r.kernel.org>,
Hans de Goede <hdegoede@...hat.com>
Subject: Re: Unplugging USB-C charger cable causes `ucsi_acpi USBC000:00:
ucsi_handle_connector_change: ACK failed (-110)`
Dear Heikki,
Thank you for your prompt reply.
Am 21.11.23 um 15:08 schrieb Heikki Krogerus:
> On Tue, Nov 21, 2023 at 12:50:43PM +0100, Paul Menzel wrote:
>> On the Dell XPS 13, BIOS 2.21.0 06/02/2022, with Debian sid/unstable and
>> Linux 6.5.10, when unplugging the (Dell) USB Type-C charger cable, Linux
>> logs the error below:
>>
>> ucsi_acpi USBC000:00: ucsi_handle_connector_change: ACK failed (-110)
>>
>> As this is logged with level error, can this be somehow fixed?
>>
>> drivers/usb/typec/ucsi/ucsi.c: dev_err(ucsi->dev, "%s: ACK failed (%d)", __func__, ret);
>>
>> Please find the output of `dmesg` attached.
>
> Thanks. The firmware not reacting to the ACK command is weird, but I'm
> not sure if it's critical. Does the interface continue working after
> that? Do you see the partner devices appearing under /sys/class/typec/
> when you plug them, and disappearing when you unplug them?
```
$ LANG= grep .
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000\:001/*
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/current_max:0
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/current_now:0
grep:
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/device:
Is a directory
grep:
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/hwmon7:
Is a directory
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/online:0
grep:
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/power:
Is a directory
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/scope:System
grep:
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/subsystem:
Is a directory
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/type:USB
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_NAME=ucsi-source-psy-USBC000:001
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_TYPE=USB
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_USB_TYPE=[C]
PD PD_PPS
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_ONLINE=0
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_VOLTAGE_MIN=5000000
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_VOLTAGE_MAX=5000000
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_VOLTAGE_NOW=5000000
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_CURRENT_MAX=0
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_CURRENT_NOW=0
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_SCOPE=System
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/usb_type:[C]
PD PD_PPS
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/voltage_max:5000000
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/voltage_min:5000000
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/voltage_now:5000000
grep:
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/wakeup49:
Is a directory
```
Now I unplugged the device, and the error is *not* logged. (I had a USB
Type-C port replicator plugged in during the day before.)
The directory is still there:
```
$ LANG= grep .
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000\:001/*
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/current_max:0
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/current_now:0
grep:
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/device:
Is a directory
grep:
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/hwmon7:
Is a directory
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/online:0
grep:
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/power:
Is a directory
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/scope:System
grep:
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/subsystem:
Is a directory
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/type:USB
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_NAME=ucsi-source-psy-USBC000:001
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_TYPE=USB
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_USB_TYPE=[C]
PD PD_PPS
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_ONLINE=0
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_VOLTAGE_MIN=5000000
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_VOLTAGE_MAX=5000000
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_VOLTAGE_NOW=5000000
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_CURRENT_MAX=0
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_CURRENT_NOW=0
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/uevent:POWER_SUPPLY_SCOPE=System
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/usb_type:[C]
PD PD_PPS
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/voltage_max:5000000
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/voltage_min:5000000
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/voltage_now:5000000
grep:
/sys/class/typec/port0/device/power_supply/ucsi-source-psy-USBC000:001/wakeup49:
Is a directory
```
I guess, that is the wrong directory I look at though?
(I am going to monitor the logs over the next days.)
Kind regards,
Paul
```
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