Launcher is black on Qt 5.3

[Timo Jyrinki]

Launcher is currently empty/black when using Qt 5.3.

---
Refer to kept-update info on the front page of https://launchpad.net/~canonical-qt5-edgers/+archive/qt5-beta2 regarding where/how to get Qt 5.3. Note that it's not necessarily that PPA itself.

[Albert Astals Cid (aacid)]

Seems like a bug somewhere else in the stack. With http://paste.ubuntu.com/7492386/ i get a red rectangle on the desktop but a black one in the phone. The black rectangle is basically the same blackness the launcher shows.

[Michał Sawicz (saviq)]

I tested this on desktop+Mir and it was fine, but is bad on all my devices (mako, flo, manta), so this seems to be android-specific.

[Gerry Boland (gerboland)]

For reference, here is the apitrace of the qml file Albert pastebinned above, when running with Qt5.2 (i.e. correctly):
http://pastebin.ubuntu.com/7496692/

It was obtained with these steps:
1. install apitrace-gl-tracers & apitrace-gl-frontend on the device
2. Run
LD_PRELOAD=/usr/lib/arm-linux-gnueabihf/apitrace/wrappers/egltrace.so:/usr/lib/arm-linux-gnueabihf/libhybris-egl/libEGL.so.1:/usr/lib/arm-linux-gnueabihf/libhybris-egl/libGLESv2.so.2 qmlscene REDBOX.qml
with the obvious substitution of qml file name
3. Once it has shown on screen, Ctrl+C it
4. Run
apitrace dump qmlscene.trace
and it'll print the GL calls performed

[Michał Sawicz (saviq)]

Qt 5.3 trace:

http://paste.ubuntu.com/7496983/

[Michał Sawicz (saviq)]

QSG_INFO=1 under 5.3: http://paste.ubuntu.com/7497146/

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Olivier Tilloy (osomon)]

webbrowser-app is also affected: with Qt 5.3, the progress bar embedded in the address bar (implemented using a ShaderEffect) doesn’t render correctly.

[Timo Jyrinki (timo-jyrinki)]

Olivier: please retest landing-005 and report back. The branch fixing this didn't get landed yet, so I now simply added it to the same silo. It fixed all our previous rendering issues in a single shot, including launcher, sliders, popups etc.

[Olivier Tilloy (osomon)]

I tested again with landing-005 and the issue is gone, which confirms it’s the same bug.
It looks like we should land this qtubuntu fix.

[Timo Jyrinki (timo-jyrinki)]

I'll mark this as Fix Committed to indicate that it has landed to landing PPA.

[Launchpad Janitor (janitor)]

This bug was fixed in the package qtubuntu - 0.54+14.10.20140613-0ubuntu1

---------------
qtubuntu (0.54+14.10.20140613-0ubuntu1) utopic; urgency=low

  [ Ubuntu daily release ]
  * New rebuild forced

  [ Alexandros Frantzis ]
  * Set the surface renderable type to QSurfaceFormat::OpenGLES when
    using OpenGL ES 2.0 In Qt 5.3 the type of used GL context is checked
    at runtime to determine supported GL features. Set the surface
    renderable type properly so that Qt can determine the features
    correctly. (LP: #1321189)
 -- Ubuntu daily release <email address hidden> Fri, 13 Jun 2014 05:37:53 +0000