Linux Mint 17 Cinnamon qt creator 5.3.1 crashes
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I disabled 3D acceleration for the virtual machines in VirtualBox and the problems disappeared. The video is slower but it's workable. Must be a conflict with my host system video driver and VirtualBox 3D acceleration. I alspo added a virtual machine of Linux Mint 17 Xfce 32 bit and the same conditions applied to it. I don't know if it could be also something to do with Linux Mint, along with my host system video driver and 3D acceleration.
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I posted a comment on this bug report:
https://bugreports.qt-project.org/browse/QTCREATORBUG-10960#comment-250224
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It's a more general problem of VirtualBox OpenGL drivers. It tends to flash, flicker and crash occasionally. It is also problematic with resizing the VM window. Qt Creator welcome screen uses QML which uses OpenGL so it shows there. Try to run any other OpenGL app and see what happens.
The issue you commented is closed, but there's another one more recent and still opened "QTBUG-34964":https://bugreports.qt-project.org/browse/QTBUG-34964
I don't think that there's much Qt can do about it. Maybe a workaround here and there but you should spam Oracle to fix their OpenGL support. -
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There's no such thing (yet) as Qt Creator 5.1.1. Current release is Qt Creator 3.1.2.
Each Qt release has a bundle package that piggy-backs a certain release of Qt Creator. At some point(I think it was 3.0?) they changed the welcome screen from widget based to a QtQuick one, and as I said QML uses OpenGL, widgets don't. If memory serves the release of Qt Creator 3.0 was somewhere around the release of Qt 5.2 so... -
Update: For Linux Mint 17 Cinnamon I was using the VirtualBox 4.3.13 Guest Additions because it fixed another problem. Once I re-installed the original 4.3.12 Guest Additions the problems went away in Linux Mint 17 Cinnamon. This fixed the video problems I was having in both Linux Mint 17 Cinnamon & Xfce, both 32 & 64 bit in VirtualBox 4.3.12
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[quote author="te777" date="1405438564"]Question: Why does Qt Creator 5.1.1 have no problems in VirtualBox, but 5.2.1 and 5.3.1 do? There must have been changes to the Qt code to affect this problem, must not there? [/quote]Qt 5.1 was released with Qt Creator 2.8, which did not have that Welcome screen.
The Welcome screen was added in Qt Creator 3.0, which was released with Qt 5.2.
[quote author="te777" date="1405438564"]Maybe Qt could use a different uses of video drivers for their Welcome screen?[/quote]The Welcome screen is a Qt Quick (QML) UI, which uses OpenGL. All Qt Quick code is rendered using OpenGL 2.0 or higher.
The user (and platform) needs to supply the desired OpenGL drivers.
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[quote author="SGaist" date="1405409698"]add
@-noload Welcome@
when calling Qt Creator from the command line.
[/quote]For future reference, you can do this through the Qt Creator GUI too. Go to "Help" -> "About Plugins..." and deselect "Qt Creator" -> "Welcome"
