On Ubuntu 10.10 machine Upgrade to Ubuntu 11.04 using the update manager. The upgrade fails and leaves the system in an unstable state. When I reboot the system I get a kernel panic on boot. The error points to /opt/abc/runtime/lib/libc.so.6.

By researching on this I found that there is a third party software abc causes problem. It has it's own runtime(libc) library. In /lib/ directory there is a link file /lib/ld-abc.so.2 --->/opt/abc/runtime/lib/ld-linux.so.2.

If we rename this file to /lib/abc.so.2 or remove this file the the upgrade is success.

Here is the upgrade log of where it crashes(apt-term.log)

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Services restarted successfully.

Processing triggers for libc-bin ...

ldconfig deferred processing now taking place

/usr/bin/dpkg: /opt/abc/runtime/lib/libc.so.6: version `GLIBC_2.11' not found (required by /usr/bin/dpkg)

/usr/bin/dpkg: /opt/abc/runtime/lib/libc.so.6: version `GLIBC_2.8' not found (required by /lib/libselinux.so.1)

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Could you please let me know what would be the problem of having a run time link library file in /lib directory. Does the ubuntu upgrade check the 3rd part runtime as well?