Created attachment 65956 [details] CPU info Tested using valgrind 3.6.1 installed via aptitude on Ubuntu 11.04 with default package sources. Also tested using 3.8 SVN built from source. Getting the following message: $ valgrind ./progname ... vex amd64->IR: unhandled instruction bytes: 0xC5 0xF9 0x57 0xC0 0x48 0x89 0xC7 0xE8 ==14825== valgrind: Unrecognised instruction at address ... ... $ valgrind --version valgrind-3.8.0.SVN $ cat /proc/version Linux version 2.6.38-12-generic (buildd@crested) (gcc version 4.5.2 (Ubuntu/Linaro 4.5.2-8ubuntu4) ) #51-Ubuntu SMP Wed Sep 28 14:27:32 UTC 2011 Not sure if it's useful info, but I am on a lenovo laptop with Intel Core i7-2720QM process and 8GB RAM (cat /proc/cpuinfo attached).
Forgot to mention, this is a Qt application, built using Qt 4.7.3. Again, not sure if this info is useful, but there it is...
*** This bug has been marked as a duplicate of bug 273475 ***