[Bug 805972] Re: Touchpad scrolling bounces
** Branch linked: lp:~kubuntu-packagers/kubuntu-packaging/qt -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to qt4-x11 in Ubuntu. https://bugs.launchpad.net/bugs/805972 Title: Touchpad scrolling bounces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 805972] Re: Touchpad scrolling bounces
This bug was fixed in the package qt4-x11 - 4:4.7.4-0ubuntu5 --- qt4-x11 (4:4.7.4-0ubuntu5) oneiric; urgency=low * debian/patches/kubuntu_95_qt_disable_bounce.diff: - Fix Touchpad scrolling bounces (LP: #805972) * debian/patches/kubuntu_14_systemtrayicon.diff: - sni-qt and hp-systray interact badly (LP: #860395) -- Didier Roche didro...@ubuntu.com Wed, 28 Sep 2011 08:43:28 +0200 ** Changed in: qt4-x11 (Ubuntu Oneiric) Status: In Progress = Fix Released -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to qt4-x11 in Ubuntu. https://bugs.launchpad.net/bugs/805972 Title: Touchpad scrolling bounces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 805972] Re: Touchpad scrolling bounces
The attached patch fixes this bug by manually removing panning gesture subscription from qabstractscrollarea.cpp. Thus all scrolling happens via mouse wheel events synthesised by X. ** Patch added: qt_disable_bounce.patch https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+attachment/2469360/+files/qt_disable_bounce.patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/805972 Title: Touchpad scrolling bounces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 805972] Re: Touchpad scrolling bounces
** Changed in: qt4-x11 (Ubuntu) Status: Triaged = In Progress ** Changed in: qt4-x11 (Ubuntu) Assignee: (unassigned) = Jussi Pakkanen (jpakkane) -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to qt4-x11 in Ubuntu. https://bugs.launchpad.net/bugs/805972 Title: Touchpad scrolling bounces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 805972] Re: Touchpad scrolling bounces
The attachment qt_disable_bounce.patch of this bug report has been identified as being a patch. The ubuntu-reviewers team has been subscribed to the bug report so that they can review the patch. In the event that this is in fact not a patch you can resolve this situation by removing the tag 'patch' from the bug report and editing the attachment so that it is not flagged as a patch. Additionally, if you are member of the ubuntu-sponsors please also unsubscribe the team from this bug report. [This is an automated message performed by a Launchpad user owned by Brian Murray. Please contact him regarding any issues with the action taken in this bug report.] ** Tags added: patch -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/805972 Title: Touchpad scrolling bounces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 805972] Re: Touchpad scrolling bounces
** Changed in: qt4-x11 (Ubuntu) Milestone: None = ubuntu-11.10 ** Also affects: qt4-x11 (Ubuntu Oneiric) Importance: Critical Assignee: Jussi Pakkanen (jpakkane) Status: In Progress -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to qt4-x11 in Ubuntu. https://bugs.launchpad.net/bugs/805972 Title: Touchpad scrolling bounces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 805972] Re: Touchpad scrolling bounces
Here's some notes from my investigations: * It is only reproducible on a full multitouch trackpad, which currently are only Apple trackpads * There seems to be some smooth scrolling and then a snap reversion * On a touchscreen, two touch drags produce inconsistent smooth scrolling but no snap reversions This leads me to believe there is some code in the Qt scroll view class that subscribes to two touch drag gestures from Qt. Qt has its own gesture recognizer that is not hooked up to uTouch, though that's beside the point. The trackpad issue can be explained by the scroll view performing smooth scrolling for a bit and then snapping back when an X scroll event (button presses 4, 5, 6, or 7) is received. Touchscreens don't emit X scroll events, so there's no snap reversion in that case. I don't trust the Qt smooth scrolling based on what I see when using a touchscreen. It's not a 1:1 scroll and it often doesn't work. Our best course of action for now is to patch out the gesture subscription from the Qt scroll view class. ** Changed in: qt4-x11 (Ubuntu) Status: Confirmed = Triaged -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to qt4-x11 in Ubuntu. https://bugs.launchpad.net/bugs/805972 Title: Touchpad scrolling bounces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 805972] Re: Touchpad scrolling bounces
** Changed in: qt4-x11 (Ubuntu) Importance: Undecided = Critical -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to qt4-x11 in Ubuntu. https://bugs.launchpad.net/bugs/805972 Title: Touchpad scrolling bounces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 805972] Re: Touchpad scrolling bounces
I bisected the patch queue and narrowed it down to this patch: http://bazaar.launchpad.net/~kubuntu-packagers/kubuntu- packaging/qt/view/head:/debian/patches/kubuntu_28_xi2.1.patch (r218) -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to qt4-x11 in Ubuntu. https://bugs.launchpad.net/bugs/805972 Title: Touchpad scrolling bounces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 805972] Re: Touchpad scrolling bounces
I have the same issue with various Qt applications when I use two-finger scrolling. It feels like the scrollbar is bouncing. The fact it only happens with touchpad and not regular mouse wheel makes me think it could be multitouch related. ** Summary changed: - No touchpad scrolling in 'By Category' list + Touchpad scrolling bounces -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to qt4-x11 in Ubuntu. https://bugs.launchpad.net/bugs/805972 Title: Touchpad scrolling bounces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
[Bug 805972] Re: Touchpad scrolling bounces
This very simple test program demonstrates the bug for me. Just start it with python touchpad.py, move the pointer over the content (not over the scrollbar) and do a double-finger scroll with the touchpad. ** Attachment added: Test program https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+attachment/2391499/+files/touchpad.py -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/805972 Title: Touchpad scrolling bounces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 805972] Re: Touchpad scrolling bounces
** Changed in: qt4-x11 (Ubuntu) Status: New = Confirmed -- You received this bug notification because you are a member of Kubuntu Bugs, which is subscribed to qt4-x11 in Ubuntu. https://bugs.launchpad.net/bugs/805972 Title: Touchpad scrolling bounces To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/qt4-x11/+bug/805972/+subscriptions -- kubuntu-bugs mailing list kubuntu-b...@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs
