Hi, I omitted what looks unrelated, please let me know if you need other details or the full content. Also I wasn't sure how to find the relevant driver, so I pasted the relevant dmesg snippets. If there is a more precise way to identify the driver please let me know and I'll send the missing items. Gen1: dmesg [ 11.307056] Bluetooth: HIDP (Human Interface Emulation) ver 1.2 [ 11.307060] Bluetooth: HIDP socket layer initialized [ 11.310541] magicmouse 0005:05AC:030E.0005: unknown main item tag 0x0 [ 11.310657] input: john’s Trackpad as /devices/pci0000:00/0000:00:14.0/usb1/1-13/1-13:1.0/bluetooth/hci0/hci0:70/0005:05AC:030E.0005/input/input21 [ 11.310776] magicmouse 0005:05AC:030E.0005: input,hidraw4: BLUETOOTH HID v1.60 Mouse [john’s Trackpad] on 00:1a:7d:da:71:09 /proc/bus/input/devices I: Bus=0005 Vendor=05ac Product=030e Version=0160 N: Name="john’s Trackpad" P: Phys=00:1a:7d:da:71:09 S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb1/1-13/1-13:1.0/bluetooth/hci0/hci0:70/0005:05AC:030E.0005/input/input21 U: Uniq=d0:a6:37:f2:c3:af H: Handlers=mouse1 event21 B: PROP=5 B: EV=10001b B: KEY=e520 10000 0 0 0 0 B: ABS=273800000000003 B: MSC=10 Gen2: dmesg [13777.762475] magicmouse 0005:004C:0265.0008: unknown main item tag 0x0 [13777.762721] input: Apple Inc. Magic Trackpad 2 as /devices/pci0000:00/0000:00:14.0/usb1/1-13/1-13:1.0/bluetooth/hci0/hci0:65/0005:004C:0265.0008/input/input24 [13777.763419] magicmouse 0005:004C:0265.0008: input,hidraw5: BLUETOOTH HID v1.00 Mouse [Julo’s Trackpad] on 00:1a:7d:da:71:09 /proc/bus/input/devices I: Bus=0005 Vendor=004c Product=0265 Version=0100 N: Name="Apple Inc. Magic Trackpad 2" P: Phys=00:1a:7d:da:71:09 S: Sysfs=/devices/pci0000:00/0000:00:14.0/usb1/1-13/1-13:1.0/bluetooth/hci0/hci0:65/0005:004C:0265.0008/input/input24 U: Uniq=04:4b:ed:ec:b3:9c H: Handlers=mouse2 event22 B: PROP=5 B: EV=b B: KEY=e520 10000 0 0 0 0 B: ABS=673810001000003 Best regards, Yariv On Sat, May 23, 2020 at 9:37 PM Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx> wrote: > > Hi, > > On Fri, May 22, 2020 at 08:27:43AM +0300, Yariv wrote: > > > > Some things I noticed: Gen2 didn't send "BTN_TOOL_FINGER" events, > > while Gen1 did, even though I did not press any button. Note that Gen1 > > still had correct timestamps before the regression, even though it > > sent these events. > > > > Another difference (maybe it's the same one..): if you take a look at > > the logs from my previous mail, you'll notice that Gen1 Trackpads > > always send both SYN_REPORT (0) as well as SYN_REPORT (1), while 2nd > > Gen Trackpads only sends SYN_REPORT (0). > > So it looks like for Gen1 touchpads we set autorepeat, and it is that > autorepeat on BTN_TOOL_FINGER that gives what you consider jitter. > > - evdev: > - [ 0, 293648, 1, 325, 2] # EV_KEY / BTN_TOOL_FINGER 2 > - [ 0, 293648, 0, 0, 1] # ------------ SYN_REPORT (1) ---------- +1ms > - evdev: > - [ 0, 303026, 3, 48, 88] # EV_ABS / ABS_MT_TOUCH_MAJOR 88 (-12) > - [ 0, 303026, 3, 53, -232] # EV_ABS / ABS_MT_POSITION_X -232 (-22) > - [ 0, 303026, 3, 54, 291] # EV_ABS / ABS_MT_POSITION_Y 291 (+60) > - [ 0, 303026, 3, 0, -232] # EV_ABS / ABS_X -232 (-22) > - [ 0, 303026, 3, 1, 291] # EV_ABS / ABS_Y 291 (+60) > - [ 0, 303026, 0, 0, 0] # ------------ SYN_REPORT (0) ---------- +10ms > > Can you please tell me what drivers are used by the 2 trackpads when they > are connected via Bluetooth? I think we should stop setting autorepeat in > the driver that handles Gen 1. > > Also, can you post /proc/bus/input/devices? > > Thanks. > > -- > Dmitry
