On Mon, Apr 20, 2020 at 10:37:15AM -0600, Kevin Locke wrote: > 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@xxxxxxxxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx Applied, thank you. > --- > 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 08e919dbeb5d..5bbc9152731d 100644 > --- a/drivers/input/serio/i8042-x86ia64io.h > +++ b/drivers/input/serio/i8042-x86ia64io.h > @@ -541,6 +541,13 @@ 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"), > + }, > + }, > { } > }; > > -- > 2.26.1 > -- Dmitry
