Hello,
it has been reported[1], the 'intel-vbtn' driver reports SW_TABLET_MODE=1
even if that doesn't accurately represent reality. That renders the
built-in keyboard and touchpad unusable when using libinput.
The device in question is
DMI: Hewlett-Packard HP Pavilion 11 x360 PC/8050, BIOS F.28 08/11/2015
with chassis type=10.
The ACPI[2] device is as follows:
Device (VGBI)
{
Name (_HID, "INT33D6" /* Intel Virtual Buttons Device */) // _HID: Hardware ID
Name (VBDS, Zero)
Name (ONTM, One)
Method (_STA, 0, Serialized) // _STA: Status
{
Return (0x0F)
}
Method (VBDL, 0, Serialized)
{
P80H = 0xD1
^^PCI0.LPCB.EC0.IVBD = One
}
Method (VGBS, 0, Serialized)
{
If ((^^PCI0.LPCB.EC0.ROLS == Zero))
{
VBDS = 0x10
}
Else
{
VBDS = Zero
}
Return (VBDS) /* \_SB_.VGBI.VBDS */
}
}
Seemingly, the 4th bit is set instead of the 6th (that is what the driver expects)
when not in tablet mode. This causes the driver to always report SW_TABLET_MODE=1.
This issue has been (most probably) introduced by commit cfae58ed681c5fe0185db843013ecc71cd265ebf
("platform/x86: intel-vbtn: Only blacklist SW_TABLET_MODE on the 9 / "Laptop" chasis-type").
As a sidenote, another interesting thing is that seemingly no ACPI events are fired when
the device is "folded".
What would be the best course of action?
[1]: https://forum.manjaro.org/t/keyboard-and-touchpad-only-work-on-kernel-5-6/22668
[2]: https://filebin.net/e1x29ym3jjo9q5ah (expires in one week)
Regards,
Barnabás Pőcze
