On Thu, Aug 2, 2012 at 7:04 PM, Zhengyu Xu <xzy3186@xxxxxxxxx> wrote: > Process: 4270 ExecStart=/usr/lib/upower/upowerd (code=killed, > signal=SEGV) The daemon was killed by SIGSEGV – in other words, it just crashed with a segmentation fault. There's not much more you can get out of it, since core dumps are not stored by default, and they would be useless without debug symbols anyway. -- Mantas Mikulėnas