I see the same problem with VIA C3 750MHz CPU (Ubuntu 6.06.1 i386 server) I found this in one discussion :
According to VIA the C3 is a native i686 cpu WITHOUT the CMOV instruction set. Due to the fact that gcc uses the cmov instructions when -march=i686 is used respectively if PROCESSOR_PENTIUMPRO is selected in the processor alias table gcc will generate invalid instructions for the c3 (see 20000609-1.c in gcc-3.3.3/gcc/testsuite/gcc.dg and compile with -march=i686 only). Source: http://gcc.gnu.org/ml/gcc-patches/2004-07/msg02718.html -- VIA C3 processor in Ubuntu Edgy 6.10 https://launchpad.net/bugs/59338 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs