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Date:   Tue, 21 Nov 2023 16:08:56 +0200
From:   Heikki Krogerus <heikki.krogerus@linux.intel.com>
To:     Paul Menzel <pmenzel@molgen.mpg.de>
Cc:     linux-usb@vger.kernel.org, LKML <linux-kernel@vger.kernel.org>,
        Hans de Goede <hdegoede@redhat.com>
Subject: Re: Unplugging USB-C charger cable causes `ucsi_acpi USBC000:00:
 ucsi_handle_connector_change: ACK failed (-110)`
Message-ID: <ZVy5+AxnOZNmUZ15@kuha.fi.intel.com>
References: <b2466bc2-b62c-4328-94a4-b60af4135ba7@molgen.mpg.de>
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On Tue, Nov 21, 2023 at 12:50:43PM +0100, Paul Menzel wrote:
> Dear Linux folks,
> 
> 
> 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?

thanks,

-- 
heikki