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Message #07406
[Bug 1638517] Re: Mir-backed InputDeviceModel doesn’t work on touch device
@Lorn: no need for webbrowser-app, the issue can be reliably reproduced
with the standalone QML example in comment #1. I just tested on arale
with the latest rc-proposed image, saved the example as /tmp/test.qml
and ran it like so:
phablet@ubuntu-phablet:/tmp$ qmlscene --desktop_file_hint=unity8
test.qml
When plugging in a bluetooth keyboard/mouse combo, I’m seeing the
following output:
QObject: Cannot create children for a parent that is in a different thread.
(Parent is QInputInfoManagerMir(0xae10e6ac), parent's thread is QThread(0x1612170), current thread is QThread(0x176c3f8)
qml: keyboard count: 0
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https://bugs.launchpad.net/bugs/1638517
Title:
Mir-backed InputDeviceModel doesn’t work on touch device
Status in qtsystems-opensource-src package in Ubuntu:
Confirmed
Bug description:
I’ve prepared a branch of webbrowser-app that makes use of the latest
qml-module-qtsysteminfo for input device detection
(https://code.launchpad.net/~osomon/webbrowser-app/use-
qtsystems/+merge/309667), and when I test it on arale, I’m seeing the
following error in the logs when connecting a bluetooth keyboard/mouse
combo to the device:
QObject: Cannot create children for a parent that is in a different thread.
(Parent is QInputInfoManagerMir(0xaa09a6ac), parent's thread is QThread(0x1fba0b8), current thread is QThread(0xb08612d8)
This looks like a threading issue in the implementation of the Mir
backend for InputInfo.
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References