[Bug 221142] ucsi_acpi actively breaks USB-C PD charging on Lenovo Legion Pro 7 (Arrow Lake)

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221142

Wei Huang (huangwei@kylinos.cn) changed:

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                 CC|                            |huangwei@kylinos.cn

--- Comment #1 from Wei Huang (huangwei@kylinos.cn) ---
Hi Alstergee,

Thanks for the detailed report, and for verifying that blacklisting
ucsi_acpi restores normal PD negotiation on this machine.

The cleanest way forward is a DMI quirk for this model in
drivers/usb/typec/ucsi/ucsi_acpi.c - there is already a quirk mechanism
there, used for a similar EC firmware problem on LG gram laptops. To
write the quirk, I need the exact DMI identification strings of the
machine, which are not part of the report.

Could you please attach the output of:

    sudo dmidecode -t system

Alternatively, the contents of these files:

    /sys/class/dmi/id/sys_vendor
    /sys/class/dmi/id/product_name
    /sys/class/dmi/id/product_version
    /sys/class/dmi/id/product_family
    /sys/class/dmi/id/product_sku
    /sys/class/dmi/id/board_name
    /sys/class/dmi/id/board_version

With that information I can prepare a patch and submit it upstream.

Thanks!

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