https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244079
Bug ID: 244079
Summary: QEMU / KVM Q35 USB Tablet (EVTouch) input device not
captured by evdev
Product: Base System
Version: 12.1-STABLE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Many People
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: d...@graphica.com.au
BUG:
The QEMU EvTouch USB Graphics Tablet is not one of devices that is captured and
available via /dev/input/event*
The impact of this is that you cannot get X11 evadev pointer device support to
work with FreeBSD 12.1 running on QEMU / KVM / Q35 .
TESTING:
Running FreeBSD 12.1 on:
QEMU / KVM / OVMF / Q35 VM with EvTouch USB Graphics Tablet connected.
Boot shows that devices is connected:
<<DMESG USB REPORT>>
# dmesg | grep USB
uhci0: <Intel 82801I (ICH9) USB controller> port 0xb0a0-0xb0bf irq 16 at device
29.0 on pci0
uhci1: <Intel 82801I (ICH9) USB controller> port 0xb080-0xb09f irq 17 at device
29.1 on pci0
uhci2: <Intel 82801I (ICH9) USB controller> port 0xb060-0xb07f irq 18 at device
29.2 on pci0
ehci0: <Intel 82801I (ICH9) USB 2.0 controller> mem 0xc8b83000-0xc8b83fff irq
19 at device 29.7 on pci0
usbus0: 12Mbps Full Speed USB v1.0
usbus2: usbus1: 12Mbps Full Speed USB v1.0
usbus3: 12Mbps Full Speed USB v1.0
480Mbps High Speed USB v2.0
ugen3.2: <QEMU QEMU USB Keyboard> at usbus3
ukbd0: <QEMU QEMU USB Keyboard, class 0/0, rev 2.00/0.00, addr 2> on usbus3
ugen3.3: <QEMU QEMU USB Mouse> at usbus3
ugen3.4: <QEMU QEMU USB Tablet> at usbus3
ums0: <QEMU QEMU USB Mouse, class 0/0, rev 2.00/0.00, addr 3> on usbus3
uhid0: <QEMU QEMU USB Tablet, class 0/0, rev 2.00/0.00, addr 4> on usbus3
<<DMESG USB REPORT>>
So QEMU USB Tablet is found and connected to device /dev/uhid0
However it does not appear in set of evdev captured devices
<<EVDEV DEVICE INFO>>
# python3.7 -m evdev.evtest
ID Device Name Phys
Uniq
------------------------------------------------------------------------------------------------------------------------------------------
0 /dev/input/event0 System keyboard multiplexer kbdmux0
1 /dev/input/event1 System mouse sysmouse
2 /dev/input/event2 AT keyboard atkbd0
3 /dev/input/event3 IntelliMouse Explorer psm0
4 /dev/input/event4 QEMU QEMU USB Keyboard, class 0/0, rev 2.00/0.00, addr
2 ukbd0 68284-0000:00:1d.7-1
5 /dev/input/event5 QEMU QEMU USB Mouse, class 0/0, rev 2.00/0.00, addr 3
ums0 89126-0000:00:1d.7-4
Select devices [0-5]:
<<END EVDEV DEVICE INFO>>
NOTE: Kernel build with netmap disabled kernel due to this bug:
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=241774)
EXPECTED BEHAVIOUR:
QEMU USB Tablet should also be one of devices captured with input data
available via /dev/input/event* device
Please let me know if you need additional testing to help with diagnosis.
I am reporting this as effecting many people as flow through to lack of EvTouch
USB support much discussed issues when doing web search. This bug reports
potential root cause fix.
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