While I've not seen this specifically, I have run across a similar symptom to the one you describe - disabling the backing store feature of my X server resolved it for me. I'm not familiar enough with how all of the pieces fit together to say why, but it might be worth a shot. dp
-----Original Message----- From: Flo [mailto:[email protected]] Sent: Thu 4/8/2010 10:24 PM To: [email protected] Subject: [VirtualGL-Users] QT + VirtualGL = black viewport flickering - nodisplay Dear All, I have an issue that was previously reported on you mailinglist here and not answered: http://sourceforge.net/mailarchive/message.php?msg_id=cbb4c0f20802191246o289 [email protected] Specifically, I have a Qt application that uses 2D and 3D rendering in viewports. Although fine as standalone, when used through VirtualGL, every viewport (2D or 3D) is black. The only moment when I can see the proper content is by creating a mouse event (movement, click and else), where it flickers and for a second I can see the proper content before it becomes black again. I tried many combination of VirtualGL options but it seems not to do any good. The VirtualGL server is a SLED 11, although using few Suse OSS 11.2 repo, 64-bits and NVidia video card. "from what have been said: It sounds like if the OpenGL buffer is not flushed properly. We are also aware of problems with some OpenGL drivers, beside the ones from Nvidia, where setting the VTK rendering mode to "immediate" may help." But it didn't go any further in the thread. Any help would be greatly appreciated. Flo.
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