I had the case that i programmed sleeptimer to 60 minutes, Go to sleep and it kept running when i get up in the morning. I attached a video (shortened) 3 minutes went to 9 minutes. But i also made a test with 1 minute and it worked. Seems a bit random. I use xfce xubuntu x64 on an intel atom. Python 2.7.3.
Issue #141 duplicate