Fit-PC on Ubuntu appears to power down and needs reboot to return to life
mbradley612 opened this issue · 4 comments
I think we need to disable power management. See http://ubuntuforums.org/showthread.php?t=788276
Power management disabled. We'll see what effect that has.
We've disabled in two ways:
- the service acpid disabled
- we're passing in acpi=off into the linux kernel through the grub startup.
Hopefully this will resolve the problem. Closing for now ...
Turning off ACPI power management was a bad idea. It made the whole Fit-PC unstable. Symptoms including not enough CPU for PulseAudio and the serial TTY to the lights disconnecting.
Re-enabled power management and it is happy again.
It looks like what we are experiencing is a screen blanking, where X sends a blank screen to the monitor. The output of xset -q shows:
Screen Saver:
prefer blanking: yes
cycle: 600
See http://idratherhack.blogspot.co.uk/2011/09/disable-screen-blanking-in-linux-how.html for a useful set of hints.
Ive added the setterm commands to control the console behaviour to the x commands that were part of the original kiosh.sh