Valentina stops accepting input on defocus - Gentoo Linux/KDE/KWin

[Susan Spencer]

Defocusing when a tool window is open makes Valentina stop accepting inputs

This is Valentina 0.3.1 on Gentoo Linux (running ~amd64, freshly updated), built with Qt 5.4.1, running under KDE 4 with KWin 4.11.17 or 4.11.19 on the standard X.org server version 1.17.1. KWin acts as compositor, with OpenGL support from the built-in GPU in the Core i7-2640M CPU. KWin is configured with click-to-focus policy.

1. Start Valentina.
2. Click the "Add a new pattern piece" button.
3. In the "Measurements" window, choose "Use for creation pattern standard measurement table".
4. When the "Standard table" window appears, move focus away from Valentina (by clicking the desktop background, clicking another window or alt-tabbing).
5. The "Standard table" window disappears, and the main window no longer accepts any input, not even closing the window. To kill it, run "killall valentina" from a shell.

This also happens with other tool windows, e.g.: 1. Create a new pattern piece. 2. Click the "Point at distance and angle" button. 3. Click the default point, "A". 4. Click anywhere on the canvas. 5. The "Point at distance and angle" window appears. 6. Move focus away from Valentina. The "Point at distance and angle" window disappears, and the main window no longer accepts any input.

No output appears in the shell where Valentina was started, but after the bug manifests, every click on the unresponsive main Valentina window results in two identical lines appearing in ~/.xsession-errors:

kwin(2136) KWin::Workspace::takeActivity: takeActivity: not shown kwin(2136) KWin::Workspace::takeActivity: takeActivity: not shown

One strange detail is that "xlsclients -al", which shows all my other open windows, never lists Valentina, neither before nor after the bug manifests

[Roman Telezhynskyi]

Can you repeat? Because i can't.

[Susan Spencer]

I followed the steps above to move focus away from Valentina and did not encounter any input problems. I'm using Ubuntu 14.04 64bit.

This may be a problem with Gentoo's KDE/KWin window manager. Ubuntu uses Unity. Arch uses LXDE.

KWin apparently has problems working with Mesa9 & 10 (mesa 8 is the latest version it can work with), problems with Intel graphics cards, some people have to disable 'Desktop effects' to keep java-based programs from hanging, and other seemingly random issues with KWin.

Similar to this issue? https://bugs.kde.org/show_bug.cgi?id=317484

Related to this issue? https://bugs.freedesktop.org/show_bug.cgi?id=79919

[Roman Telezhynskyi]

Issue #240 was marked as a duplicate of this issue.

[Roman Telezhynskyi]

I still think it is not our bug. We should have section "Known problems" in WIKI.

[Susan Spencer]

It's not our bug.

[Roman Telezhynskyi]

It's not our bug.

But? :)

[Susan Spencer]

Our user should file a bug with kwin.

[Susan Spencer]

Here is the user's input, after digging a bit into kwin:

"So I did a little more digging, and it seems that this is indeed a KWin bug. It seems Valentina was first to hit it since it's the first application I've ever seen that has created a modal tool window.

See https://bugs.kde.org/show_bug.cgi?id=348083 for the bug report.

Until that's been fixed, making the window normal by removing the line

this->setWindowFlags(Qt::Tool | Qt::WindowTitleHint | Qt::WindowCloseButtonHint | Qt::CustomizeWindowHint);

from the function

src/app/dialogs/app/dialogstandardmeasurements.cpp: DialogStandardMeasurements::DialogStandardMeasurements()

makes the problem go away. Unsetting "Hide utility windows for inactive applications" in KWin also works.

[Roman Telezhynskyi]

Fixed issue #303. Valentina stops accepting input on defocus - Gentoo Linux/KDE/KWin.

→ <<cset 813af27f178e>>

[Roman Telezhynskyi]

Fixed issue #303. Valentina stops accepting input on defocus - Gentoo Linux/KDE/KWin.

→ <<cset 13834285f6b2>>