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The Question is: We are running OpenVMS 7.3-1 on a DS20E with a PowerStorm 350 Graphics card. We have a graphics application that is using PHIGS graphics in OpenGL mode (PHIGS$WSTYPE 272). The application updates and redraws the screen 10 times per second. Our problem is the screen flickers as the application is running. How do I get the screen to stop flickering? The Answer is : Please see the OpenVMS FAQ discussion on graphics controller and video display compatibility, as it would appear that your (unspecified) monitor is not correctly synchronizing to your PowerStorm 350 series graphics controller. It is also possible that the application is explicitly or implicitly changing the resolution and the video synchronization, as your report could be read to indicate this problem only arises when this application is running. The OpenVMS Wizard will assume you have verified that the hardware involved is functioning correctly. If not, the OpenVMS Wizard would recommend checking the synchronization and resolution for compatibility, and swapping in another monitor for testing. Double buffering (in either hardware or software) is also typically enabled for improved animation effects; to reduce flicker. This can be demonstrated with the ico tool: $ ico :== $DECW$EXAMPLES:ICO.EXE: $ ico ! runs very fast with poor animation; default window is large $ ico -dbl ! runs more slowly with good animation; default window is small $ ico -softdbl ! may not run at all ico: can't allocate enough color planes This could also potentially be a hardware-level driver problem. (The OpenVMS Wizard would encourage the installation of the most current mandatory ECO kits for OpenVMS and including the GRAPHICS ECO, any ECOs specific to the platform, and DECwindows.) Please then contact the customer support center.
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