raveling@isi.edu (Paul Raveling) (11/07/89)
HELP!!!!!! We're seeing a lot of X11 display server crashes on HP 9000/300 series machines running MIT X11R3. If anyone else (HP people perhaps?) have seen this and tracked it down, we'd appreciate hearing about it. Symptoms are inconsistent, but often involve bus errors, segmentation faults, and "softer" failures in XRealloc. They're generally consistent with memory clobber. Some core files show stack traces that also strongly hint at memory clobber. What's common among these failures is that it appears they all involve either: -- Tiling the root window, especially with a pixmap that's larger than the screen. For example, I can reproduce it at will by running xbigphoon on a Topcat (1024x768) display. It's harder to produce failures when tiling with smaller pixmaps, but it happens. When it happens, it's clear that the pixmap needs to be clipped at the edge of the screen. -- An exposure on a window with at least one dimension larger than the corresponding screen dimension. A couple stack traces from dumps suggest one of the ValidateGC routines may be involved (perhaps cfbValidteGC or topcatValidateGC). Does anyone recognize these symptoms? ---------------- Paul Raveling Raveling@isi.edu