Launchpad has imported 8 comments from the remote bug at https://bugs.freedesktop.org/show_bug.cgi?id=78345.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2014-05-06T15:52:38+00:00 Daniel d'Andrada wrote: It happens on Ubuntu running on laptop with a touchscreen. Scenario: - There's a small window whose client called XISelectEvents on it for the touchscreen slave device with mask=XI_TouchBegin|XI_TouchUpdate|XI_TouchEnd (client[5290, /usr/lib/x86_64-linux-gnu/qt5/bin/qmlscene qml-demo-minimal-client.qml] in the logs). - compiz and nautilus (which handles the desktop background) have selections and/or grabs on the master device Actions: 1- user taps the qmlscene window. Touch events are reported to both qmlscene (from the slave device) and to compiz (from the master device). compiz rejects the touch sequence and it's not delivered to anyone else 2- user now presses on the desktop background. TouchBegin, TouchOwnership and further TouchUpdates are sent to compiz. 3- compiz rejects the touch sequence. TouchPuntToNextOwner fails to emulate a pointer and pass it to nautilus as it still thinks that touch 1 is active. And as per pointer emulation rules, only the oldest active touch is used for touch emulation. From the logs, the lines are: """ [ 9223.917] (II) TouchPuntToNextOwner: touch 2 [ 9223.917] (II) - Not all older pointer emulated touches have been seen yet. Oldest touch(client_id=1, active=1, pending_finish=0, emulate_pointer=1). """ 4- user lifts his finger So that scenario on touch 1 clearly left xserver in an inconsistent, buggy, state. Reply at: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1307701/comments/28 ------------------------------------------------------------------------ On 2014-05-06T15:53:47+00:00 Daniel d'Andrada wrote: Created attachment 98564 Xorg.log with detailed input event handling info Reply at: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1307701/comments/29 ------------------------------------------------------------------------ On 2014-05-06T15:54:25+00:00 Daniel d'Andrada wrote: Created attachment 98565 A filtered Xorg.log with only the interesting parts Reply at: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1307701/comments/30 ------------------------------------------------------------------------ On 2014-05-06T15:54:42+00:00 Daniel d'Andrada wrote: Created attachment 98566 output of xinput Reply at: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1307701/comments/31 ------------------------------------------------------------------------ On 2014-05-06T15:55:08+00:00 Daniel d'Andrada wrote: Created attachment 98567 output of xwininfo showing the whole window tree Reply at: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1307701/comments/32 ------------------------------------------------------------------------ On 2014-05-06T15:57:35+00:00 Daniel d'Andrada wrote: For reference, those were the steps I took when recording the log - started lightdm (and threfore X) - logged in - launched the Qt app (qmlscene) - tapped on the qmlscene window - tapped on the desktop background (nautilus) - closed the Qt app (qmlscene) - stopped lightdm (and threfore X) Reply at: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1307701/comments/33 ------------------------------------------------------------------------ On 2014-05-07T15:09:20+00:00 Bugs-i wrote: Created attachment 98629 xorg-integration-tests testcase I think this reproduces the bug quite well, does this match your logs? Reply at: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1307701/comments/39 ------------------------------------------------------------------------ On 2014-05-07T15:56:41+00:00 Bugs-i wrote: Comment on attachment 98629 xorg-integration-tests testcase Woops, test is broken, the way it was written probably doesn't reproduce this bug. Although I believe it probably matches the description of the bug. Maybe missing something? Reply at: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1307701/comments/40 ** Changed in: xorg-server Status: Unknown => Confirmed ** Changed in: xorg-server Importance: Unknown => Medium -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1307701 Title: xserver mouse pointer emulation from touch breaks with QML app. To manage notifications about this bug go to: https://bugs.launchpad.net/oem-priority/+bug/1307701/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
