Messages in this thread | | | Date | Thu, 23 Nov 2023 13:22:14 +0100 | Subject | Re: Unplugging USB-C charger cable causes `ucsi_acpi USBC000:00: ucsi_handle_connector_change: ACK failed (-110)` | From | Paul Menzel <> |
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Dear Heikki,
Am 22.11.23 um 09:56 schrieb Heikki Krogerus: > On Tue, Nov 21, 2023 at 03:25:59PM +0100, Paul Menzel wrote:
>> 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
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>> ``` >> >> 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
[…]
>> ``` >> >> I guess, that is the wrong directory I look at though? >> >> (I am going to monitor the logs over the next days.) > > Just list what you have in /sys/class/typec/ before and after plugging > a device to the port: > > ls /sys/class/typec/
Sorry, here you go:
With charger:
$ ls /sys/class/typec/ port0 port0-partner
After unplugging the charger:
$ LANG= ls /sys/class/typec/ port0
By the way, Linux logs the ucsi_handle_connector_change line around five second after unplugging the USB Type-C charger cable.
Kind regards,
Paul
PS: In the logs since October 30th, I see the three distinct lines below:
1. ucsi_acpi USBC000:00: failed to re-enable notifications (-110) 2. ucsi_acpi USBC000:00: GET_CONNECTOR_STATUS failed (-110) 3. ucsi_acpi USBC000:00: ucsi_handle_connector_change: ACK failed (-110)
Is it documented somewhere what -100 means?
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