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| author | Lovekesh Solanki <lovekeshsolanki00@gmail.com> | 2026-09-20 17:05:41 +0530 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2026-09-20 19:54:13 -0700 |
| commit | 495cd7f858b45d2ffa9b685bba3a8c23c1ca4dd3 (patch) | |
| tree | f44aa9f6399515c8017c76c22298578ac9f46f07 /drivers/input | |
| parent | a961417c5ae77bbb728a23d9577ecd8f4d8a4b5a (diff) | |
| download | linux-stable-495cd7f858b45d2ffa9b685bba3a8c23c1ca4dd3.tar.gz linux-stable-495cd7f858b45d2ffa9b685bba3a8c23c1ca4dd3.zip | |
Input: i8042 - add nomux quirk for Fujitsu LIFEBOOK U7410
On the Fujitsu LIFEBOOK U7410 the internal keyboard and touchpad die
shortly after boot if i8042 multiplexing controller is probed and
switched to muxed mode. These multiplexing setup commands disturb the EC
emulated keyboard and atkbd reports "Spurious ACK" and "Unknown key
pressed" warnings, after which both keyboard and touchpad stop
delivering events. Both touchpad and keyboard work in BIOS and GRUB.
Disabling multiplexer using i8042.nomux=1 makes both devices work on
warm/cold boot.
Add a DMI quirk to force nomux mode for this model.
Reported-by: Heiko Brey <cico0815@gmx.de>
Link: https://lore.kernel.org/all/89f36f3f5e4c2d07b9ff72bc0b355875c336e498.camel@gmx.de/
Signed-off-by: Lovekesh Solanki <lovekeshsolanki00@gmail.com>
Link: https://patch.msgid.link/20260920113541.1484808-1-lovekeshsolanki00@gmail.com
Cc: stable@vger.kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/serio/i8042-acpipnpio.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/input/serio/i8042-acpipnpio.h b/drivers/input/serio/i8042-acpipnpio.h index 54eb36870..1b1c5d4ac 100644 --- a/drivers/input/serio/i8042-acpipnpio.h +++ b/drivers/input/serio/i8042-acpipnpio.h @@ -672,6 +672,15 @@ static const struct dmi_system_id i8042_dmi_quirk_table[] __initconst = { .driver_data = (void *)(SERIO_QUIRK_NOAUX) }, { + /* Fujitsu LIFEBOOK U7410 */ + /* Mux mode also disturbs the EC keyboard, causing spurious ACKs */ + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "FUJITSU CLIENT COMPUTING LIMITED"), + DMI_MATCH(DMI_PRODUCT_NAME, "LIFEBOOK U7410"), + }, + .driver_data = (void *)(SERIO_QUIRK_NOMUX) + }, + { /* Gigabyte M912 */ .matches = { DMI_MATCH(DMI_SYS_VENDOR, "GIGABYTE"), |