Public bug reported: Binary package hint: xserver-xorg-core
I have uncovered a bug in the X server on both Gutsy and Hardy. I have been able to reproduce the bug on two different machines using three different drivers (nvidia, vesa, intel) and with two different software packages. The problem appears related to drawing large numbers of very small filled polygons. The fact that two different software packages trigger the bug and that it occurs on different machines using different video drivers suggests that the bug is deep in the X server code. How to reproduce the crash: Scenario 1: 1) wget http://www.keittlab.org/~tkeitt/melanesia.tgz -O- | tar zxvf - 2) qgis melanesia.shp # qgis 0.9.2-rc2 from www.qgis.org Note that qgis is not packaged for Hardy, but I was able to run it on Gutsy (chrooted) and redirect the display to Hardy and was able to crash the X server in Hardy. Scenario 2: 1) wget http://www.keittlab.org/~tkeitt/melanesia.tgz -O- | tar zxvf - 2) R # www.r-project.org then in R (instruction below on setting up R) > library(rgdal) > x <- readOGR('melanesia.shp', 'melanesia') > plot(x) # OK! Polygons _not_ filled > spplot(x) # crash This also crashes the X server. I cannot tell whether it is filling the polygons or simply using color to display the polygons that triggers the core dump. Obviously it is rather difficult to debug the X server. I've tried several approaches, but without much insight. Setting up R: 1) apt-get install r-base-dev 2) R in R install.packages('rgdal', dep = T) ** Affects: xorg-server (Ubuntu) Importance: Undecided Status: New -- Xorg crashes drawing complex geometries https://bugs.launchpad.net/bugs/208899 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
