From: Kevin Locke kevin@kevinlocke.name
[ Upstream commit 18931506465a762ffd3f4803d36a18d336a67da9 ]
On the Lenovo ThinkPad Twist S230u (3347-4HU) with BIOS version "GDETC1WW (1.81 ) 06/27/2019", whether booted in UEFI or Legacy/CSM mode 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 on BIOS 1.57 and later.[1][2][3][4][5]
This model does not have an external PS/2 port, so mux does not appear to be useful.
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.
Adding 33474HU to the nomux list avoids the issue on my system.
[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/feb8a8339a67025dab3850e6377eb6f3a0e782ba.158740063... 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 0d0f977a2f39..8bf38eded1ef 100644 --- a/drivers/input/serio/i8042-x86ia64io.h +++ b/drivers/input/serio/i8042-x86ia64io.h @@ -545,6 +545,13 @@ static const struct dmi_system_id __initconst i8042_dmi_nomux_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5738"), }, }, + { + /* Lenovo ThinkPad Twist S230u */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_NAME, "33474HU"), + }, + }, { } };