Brent S. Elmer wrote: > I moved qtrc out of the way. I don't think there is any difference. > > (gdb) r > Starting program: /home/brente/firegl/fireglcontrol > [Thread debugging using libthread_db enabled] > [New Thread -1222276896 (LWP 25293)] > Qt: gdb: -nograb added to command-line options. > Use the -dograb option to enforce grabbing. > > Program received signal SIGFPE, Arithmetic exception. > [Switching to Thread -1222276896 (LWP 25293)] > 0xb79b1bed in create_dpis () at kernel/qpaintdevice_x11.cpp:531 > 531 kernel/qpaintdevice_x11.cpp: No such file or directory. > in kernel/qpaintdevice_x11.cpp > (gdb) bt > #0 0xb79b1bed in create_dpis () at kernel/qpaintdevice_x11.cpp:531 > #1 0xb79b1cbb in QPaintDevice::x11AppDpiY (screen=-1) > at kernel/qpaintdevice_x11.cpp:653 > #2 0xb79b1d38 in QPaintDevice::x11AppDpiY () [...] OK, this is the same as http://bugs.debian.org/384325 and you might want to try the workaround explained in the next-to-last mail, http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=384325;msg=47 This is definitely a Qt problem, not fireglcontrol's. I'm going to reassign this bug to Qt and merge it with #384325 unless someone can show me that something in fireglcontrol is "helping" this bug to come out.