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    Subject[PATCH 4.9 24/61] Input: i8042 - add ThinkPad S230u to i8042 reset list
    Date
    From: Kevin Locke <kevin@kevinlocke.name>

    [ Upstream commit 2712c91a54a1058d55c284152b4d93c979b67be6 ]

    On the Lenovo ThinkPad Twist S230u (3347-4HU) with BIOS version
    "GDETC1WW (1.81 ) 06/27/2019", the keyboard, Synaptics TouchPad, and
    TrackPoint either do not function or stop functioning a few minutes
    after boot. This problem has been noted before, perhaps only occurring
    with BIOS 1.57 and later.[1][2][3][4][5]

    Odds of a BIOS fix appear to be low: 1.57 was released over 6 years ago
    and although the [BIOS changelog] notes "Fixed an issue of UEFI
    touchpad/trackpoint/keyboard/touchscreen" in 1.58, it appears to be
    insufficient.

    Setting i8042.reset=1 or adding 33474HU to the reset list avoids the
    issue on my system from either warm or cold boot.

    [1]: https://bugs.launchpad.net/bugs/1210748
    [2]: https://bbs.archlinux.org/viewtopic.php?pid=1360425
    [3]: https://forums.linuxmint.com/viewtopic.php?f=46&t=41200
    [4]: https://forums.linuxmint.com/viewtopic.php?f=49&t=157115
    [5]: https://forums.lenovo.com/topic/findpost/27/1337119
    [BIOS changelog]: https://download.lenovo.com/pccbbs/mobiles/gduj33uc.txt

    Signed-off-by: Kevin Locke <kevin@kevinlocke.name>
    Cc: stable@vger.kernel.org
    Link: https://lore.kernel.org/r/94f384b0f75f90f71425d7dce7ac82c59ddb87a8.1587702636.git.kevin@kevinlocke.name
    Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
    Signed-off-by: Sasha Levin <sashal@kernel.org>
    ---
    drivers/input/serio/i8042-x86ia64io.h | 7 +++++++
    1 file changed, 7 insertions(+)

    diff --git a/drivers/input/serio/i8042-x86ia64io.h b/drivers/input/serio/i8042-x86ia64io.h
    index 42330024da2f..d15fd73dbd80 100644
    --- a/drivers/input/serio/i8042-x86ia64io.h
    +++ b/drivers/input/serio/i8042-x86ia64io.h
    @@ -745,6 +745,13 @@ static const struct dmi_system_id __initconst i8042_dmi_reset_table[] = {
    DMI_MATCH(DMI_PRODUCT_NAME, "P65xRP"),
    },
    },
    + {
    + /* Lenovo ThinkPad Twist S230u */
    + .matches = {
    + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
    + DMI_MATCH(DMI_PRODUCT_NAME, "33474HU"),
    + },
    + },
    { }
    };

    --
    2.25.1


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