These message are being received "qt.qpa.input.events: scroll event from unregistered device"

SMF-Qt

Sorry, USB keyboard and mouse via a kvm switch nothing else.

SMF-Qt

OK, it looks like the events appear when I use the KVM switch.

SGaist

@SMF-Qt that's a but unexpected. Is your KVM advertised as something else than an input device ?

SMF-Qt

Each time I switch I get the following (2 from many events) from the kernal (dmesg). All my linux systems connected to the kvm report the same kernal activity only one of the systems reports the "qt.qpa.input.events".

[765315.192379] usb 2-3.1: new low-speed USB device number 81 using ehci-pci
[765315.291101] usb 2-3.1: New USB device found, idVendor=1c4f, idProduct=0043, bcdDevice= 1.07
[765315.291107] usb 2-3.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[765315.291109] usb 2-3.1: Product: USB Keyboard
[765315.291110] usb 2-3.1: Manufacturer: HA305-3
[765315.294194] input: HA305-3 USB Keyboard as /devices/pci0000:00/0000:00:13.2/usb2/2-3/2-3.1/2-3.1:1.0/0003:1C4F:0043.0189/input/input602
[765315.346830] hid-generic 0003:1C4F:0043.0189: input,hidraw4: USB HID v1.10 Keyboard [HA305-3 USB Keyboard] on usb-0000:00:13.2-3.1/input0
[765315.350009] input: HA305-3 USB Keyboard Consumer Control as /devices/pci0000:00/0000:00:13.2/usb2/2-3/2-3.1/2-3.1:1.1/0003:1C4F:0043.018A/input/input603
[765315.401626] input: HA305-3 USB Keyboard System Control as /devices/pci0000:00/0000:00:13.2/usb2/2-3/2-3.1/2-3.1:1.1/0003:1C4F:0043.018A/input/input604
[765315.401720] hid-generic 0003:1C4F:0043.018A: input,hidraw5: USB HID v1.10 Device [HA305-3 USB Keyboard] on usb-0000:00:13.2-3.1/input1
[765370.553505] usb 2-3.1: USB disconnect, device number 81

[769950.486280] usb 2-3.1: new low-speed USB device number 82 using ehci-pci
[769950.584701] usb 2-3.1: New USB device found, idVendor=1c4f, idProduct=0043, bcdDevice= 1.07
[769950.584708] usb 2-3.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
[769950.584711] usb 2-3.1: Product: USB Keyboard
[769950.584713] usb 2-3.1: Manufacturer: HA305-3
[769950.587901] input: HA305-3 USB Keyboard as /devices/pci0000:00/0000:00:13.2/usb2/2-3/2-3.1/2-3.1:1.0/0003:1C4F:0043.018B/input/input605
[769950.639550] hid-generic 0003:1C4F:0043.018B: input,hidraw4: USB HID v1.10 Keyboard [HA305-3 USB Keyboard] on usb-0000:00:13.2-3.1/input0
[769950.642401] input: HA305-3 USB Keyboard Consumer Control as /devices/pci0000:00/0000:00:13.2/usb2/2-3/2-3.1/2-3.1:1.1/0003:1C4F:0043.018C/input/input606
[769950.694455] input: HA305-3 USB Keyboard System Control as /devices/pci0000:00/0000:00:13.2/usb2/2-3/2-3.1/2-3.1:1.1/0003:1C4F:0043.018C/input/input607
[769950.694579] hid-generic 0003:1C4F:0043.018C: input,hidraw5: USB HID v1.10 Device [HA305-3 USB Keyboard] on usb-0000:00:13.2-3.1/input1
[770393.889747] usb 2-3.1: USB disconnect, device number 82

In the Xorg.log I get a similar set of messages about the keyboard, here is an example (1 from many):

[ 17.107] (II) config/udev: Adding input device HA305-3 USB Keyboard (/dev/input/event2)
[ 17.107] () HA305-3 USB Keyboard: Applying InputClass "evdev keyboard catchall"
[ 17.107] () HA305-3 USB Keyboard: Applying InputClass "system-keyboard"
[ 17.107] () HA305-3 USB Keyboard: Applying InputClass "libinput keyboard catchall"
[ 17.107] (II) Using input driver 'libinput' for 'HA305-3 USB Keyboard'
[ 17.107] () HA305-3 USB Keyboard: always reports core events
[ 17.107] (II) event2 - HA305-3 USB Keyboard: is tagged by udev as: Keyboard
[ 17.107] (II) event2 - HA305-3 USB Keyboard: device is a keyboard
[ 17.108] (II) event2 - HA305-3 USB Keyboard: device removed
[ 17.117] (II) XINPUT: Adding extended input device "HA305-3 USB Keyboard" (type: KEYBOARD, id 8)
[ 17.118] (II) event2 - HA305-3 USB Keyboard: is tagged by udev as: Keyboard
[ 17.118] (II) event2 - HA305-3 USB Keyboard: device is a keyboard
[ 17.118] (II) config/udev: Adding input device HA305-3 USB Keyboard Consumer Control (/dev/input/event3)

The mouse only appears once in the kernel messages (the machine has been up 11days):

Mar 9 19:21:46 Andromeda kernel: [ 3.606392] hid-generic 0003:0557:2213.0004: input,hidraw3: USB HID v1.00 Mouse [ATEN USB KVMP w. OSD] on usb-0000:00:13.2-3.3.1/input1
Mar 9 19:21:46 Andromeda kernel: [ 3.646397] mousedev: PS/2 mouse device common for all mice

However the Xorg.log shows many events:

[ 16.914] (==) modeset(0): Silken mouse enabled
[ 17.127] (II) XINPUT: Adding extended input device "HA305-3 USB Keyboard Consumer Control" (type: MOUSE, id 9)
[ 17.153] (II) event6 - ATEN USB KVMP w. OSD: is tagged by udev as: Mouse
[ 17.167] (II) XINPUT: Adding extended input device "ATEN USB KVMP w. OSD" (type: MOUSE, id 12)
[ 17.168] (II) event6 - ATEN USB KVMP w. OSD: is tagged by udev as: Mouse
[ 17.168] (II) config/udev: Adding input device ATEN USB KVMP w. OSD (/dev/input/mouse0)
[ 2633.808] (II) XINPUT: Adding extended input device "HA305-3 USB Keyboard Consumer Control" (type: MOUSE, id 8)
[ 13971.242] (II) XINPUT: Adding extended input device "HA305-3 USB Keyboard Consumer Control" (type: MOUSE, id 10)
[ 18791.065] (II) XINPUT: Adding extended input device "HA305-3 USB Keyboard Consumer Control" (type: MOUSE, id 10)
[ 25194.517] (II) XINPUT: Adding extended input device "HA305-3 USB Keyboard Consumer Control" (type: MOUSE, id 9)
[ 31231.683] (II) XINPUT: Adding extended input device "HA305-3 USB Keyboard Consumer Control" (type: MOUSE, id 8)
[ 36563.679] (II) XINPUT: Adding extended input device "HA305-3 USB Keyboard Consumer Control" (type: MOUSE, id 9)
[ 46198.188] (II) XINPUT: Adding extended input device "HA305-3 USB Keyboard Consumer Control" (type: MOUSE, id 9)
[ 46834.540] (II) XINPUT: Adding extended input device "HA305-3 USB Keyboard Consumer Control" (type: MOUSE, id 10)
[ 47590.134] (II) XINPUT: Adding extended input device "HA305-3 USB Keyboard Consumer Control" (type: MOUSE, id 10)......

SMF-Qt

@SMF-Qt

The only references to the KVM in the system logs are:

Mar 9 19:21:53 Andromeda elogind-daemon[2092]: Watching system buttons on /dev/input/event5 (ATEN USB KVMP w. OSD)
Mar 9 19:21:46 Andromeda kernel: [ 3.528056] usb 2-3.3.1: Product: USB KVMP w. OSD
Mar 9 19:21:46 Andromeda kernel: [ 3.543647] input: ATEN USB KVMP w. OSD as /devices/pci0000:00/0000:00:13.2/usb2/2-3/2-3.3/2-3.3.1/2-3.3.1:1.0/0003:0557:2213.0003/input/input10
Mar 9 19:21:46 Andromeda kernel: [ 3.595774] hid-generic 0003:0557:2213.0003: input,hidraw2: USB HID v1.00 Keyboard [ATEN USB KVMP w. OSD] on usb-0000:00:13.2-3.3.1/input0
Mar 9 19:21:46 Andromeda kernel: [ 3.606155] input: ATEN USB KVMP w. OSD as /devices/pci0000:00/0000:00:13.2/usb2/2-3/2-3.3/2-3.3.1/2-3.3.1:1.1/0003:0557:2213.0004/input/input11
Mar 9 19:21:46 Andromeda kernel: [ 3.606392] hid-generic 0003:0557:2213.0004: input,hidraw3: USB HID v1.00 Mouse [ATEN USB KVMP w. OSD] on usb-0000:00:13.2-3.3.1/input1

SMF-Qt

@SMF-Qt

Just rebuilt the linux kernel to 6.6.22 and the Qt Ui they supply shows the same behaviour so that eliminates code that I have written.

SGaist

Looks like it is doing something funny with regard to input events.

SMF-Qt

@SGaist

Ok, I have upgraded to Qt 6.6.3 and the problem has gone.

SGaist

@SMF-Qt Nice ! Then we can consider this case solved :-)

SMF-Qt

@SGaist
Yes thank you.