Thank you for testing this, takashi. Would it be possible for you to narrow it down a bit further by testing the daily built kernels from http://kernel.ubuntu.com/~kernel-ppa/mainline/daily/ ? From the dates of 2.6.30 (which does not freeze) and 2.6.31-rc1 (which does freeze), I think the change from no-freeze to freeze should be between 2009-06-10 and 2009-06-25 or so.
Thank you for testing this, takashi. Would it be possible for you to narrow it down a bit further by testing the daily built kernels from http:// kernel. ubuntu. com/~kernel- ppa/mainline/ daily/ ? From the dates of 2.6.30 (which does not freeze) and 2.6.31-rc1 (which does freeze), I think the change from no-freeze to freeze should be between 2009-06-10 and 2009-06-25 or so.