I have report the bug to freedebug.org, and the link is: https://bugs.freedesktop.org/show_bug.cgi?id=62507
2013/3/19 SuperCat <supercatexp...@gmail.com> > No, this bug occurs again just after I sent the mail. So I think maybe I > should report the bug to bugs.freedesktop.org. > > > 2013/3/19 SuperCat <supercatexp...@gmail.com> > >> I have tried the kernel you mentioned, and the bug also does not exist in >> this version. >> > >