http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=499366 suggests that the problem may be that this should be 'hwcap 1 nosegneg', not 'hwcap 0 nosegneg'.
The libc6-xen package is supposed to ship the file ./etc/ld.so.conf.d/libc6-xen.conf. The Ubuntu package is missing this file.
http:// bugs.debian. org/cgi- bin/bugreport. cgi?bug= 499366 suggests that the problem may be that this should be 'hwcap 1 nosegneg', not 'hwcap 0 nosegneg'.
The libc6-xen package is supposed to ship the file ./etc/ld. so.conf. d/libc6- xen.conf. The Ubuntu package is missing this file.