Flashing cursor causes graphical glitches in the GUI

[Daniel Richard G.]

Binary package hint: virtualbox-ose

This concerns virtualbox-ose 2.1.4-dfsg-1ubuntu3 in Ubuntu Jaunty.

When the GUI presents a dialog with a text entry, the flashing cursor causes strange graphical glitches, usually appearing as a small, mostly-black square at the cursor's position, obscuring the last letter or two that had been typed in. I will attach a screenshot to illustrate.

I have observed this on two different systems: one with Intel onboard video, one with an ATI Radeon 9250 card. So it doesn't appear to be specific to one particular video driver.

No other GUI application, Qt4-based or otherwise, has been observed to exhibit this kind of glitching.

[Daniel Richard G. (skunk)]

Bug has been observed in the Arora Web browser (package "arora"). It's not a VirtualBox issue, it's a Qt4 issue.

[Daniel Richard G. (skunk)]

Argh, it was supposed to be the original bug against virtualbox-ose that was invalid >_<

[Daniel Richard G. (skunk)]

Strike my prior comment about "no other GUI application." The Arora Web browser is based on Qt4, and exhibits the same sort of cursor-glitching as seen in VirtualBox. I'm attaching a screenshot with a typical example.

[Guenther Boelter (gboelter)]

You are right, this issue has nothing to do with virtualbox.

I have exactly the same problem with a fresh installed Ubuntu 9.04 machine. The problem with the cursor even appears in qt4-designer, changing the object name for example.

I have tested it with one of my own application. It don't work under Ubuntu because the cursor problem, but it works fine under Fedora 11 for example.

[Daniel Richard G. (skunk)]

Well, whatever was causing this bug, it's gone in Karmic.

Guenther, do you still want to push for a fix in Jaunty, or should this bug just be marked as "Fix Released?"

[Jonathan Thomas (echidnaman)]

Without the knowledge of what the fix actually was, it probably isn't feasible to single out the fix to apply for Jaunty. (Qt sees a lot of changes/bugfixes each release)