Thanks for this Tyler. At the moment i only seem able to find the acpi call for the power button, not for the cog. Are they the same at: /etc/acpi/events/powerbtn and then: /etc/acpi/powerbtn.sh ? If not can someone tell me where the acpi script for the cog is? Thanks, j <div class="gmail_quote">On 7 October 2012 22:31, Tyler J. Wagner <<a href="mailto:tyler@tolaris.com" target="_blank">tyler@tolaris.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div class="im">On 2012-10-07 12:26, James Morrissey wrote: > > Following up on this issue: > > >> sudo poweroff > >> sudo shutdown -h now > > >I'll give it a try once i have run the machine for a few hours. The > >longer i run it the more likely the restart error occurs. > > Using: sudo poweroff seems to stop the restart issue from happening. > Does this mean that there is a software problem in the shutdown process > via the cog? </div>The cog *probably* sends an ACPI call, and ACPI has a script that it runs to shut down. I'd start by investigating that. It's possible that replacing whatever it is doing with the poweroff command would solve it for you. A hack, but if it works, great. I recall doing something similar back in the ... edgy (?) days? Regards, Tyler -- "All parts should go together without forcing. You must remember that the parts you are reassembling were disassembled by you. Therefore, if you can't get them together again, there must be a reason. By all means, do not use a hammer." -- IBM maintenance manual (1925) </blockquote></div>