https://bugzilla.kernel.org/show_bug.cgi?id=209011 --- Comment #13 from Hans de Goede (jwrdegoede@xxxxxxxxxxxxxxxxx) --- Thanks, I'm pretty sure I know what is going on here. I'm writing a kernel patch to fix this now. If you are curious what is going on here is a comment which I just wrote to document the code/fix I'm working on: /* * Helper code to detect 360 degree hinges (yoga) style 2-in-1 devices using 2 accelerometers * to allow the OS to determine the angle between the display and the base of the device. * * On Windows these are read by a special HingeAngleService process which calls undocumented * ACPI methods, to let the firmware know if the 2-in-1 is in tablet- or laptop-mode. * The firmware may use this to disable the kbd and touchpad to avoid spurious input in * tablet-mode as well as to report SW_TABLET_MODE info to the OS. * * Since Linux does not call these undocumented methods, the SW_TABLET_MODE info reported * by the intel-hid / intel-vbtn drivers is incorrect. These drivers use the detection * code in this file to disable SW_TABLET_MODE reporting to avoid reporting broken info * (instead userspace can derive the status itself by directly reading the 2 accels). */ Now I just need to actually write the mentioned detection code, test it on one of my own devices and then hook it up in the intel-vbtn.c and intel-hid drivers. -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
