The following comments are owned by whoever posted them. WineHQ is not responsible for what they say.
RE: Starcraft 2 crashes before I can log in
by Christian Widmer on Wednesday April 11th 2012, 7:57
Ptrace is a system call that allows a process (typically a debugger) to inspect and manipulate the internal state of another process[1]. Because this poses a potential security risk the ptrace_scope option allows processes to use ptrace only on their descendants rather than on arbitrary processes[2].
The ptrace_scope option has therefore been included and enabled by default in Ubuntu 10.10. This, however, used to break some wine programs but the problems have been fixed for some time then[3][4].
Somehow the upgrade to Ubuntu 12.04 (and perhaps wine 1.5) lead to the reappearance of the issues.
[1] en.wikipedia.org/wiki/Ptrace [2] wiki.ubuntu.com/Security/Features#ptrace [3] bugs.launchpad.net/ubuntu/+source/wine1.2/+bug/636278 [4] bugs.winehq.org/show_bug.cgi?id=24193
