On 10/2/20 1:17 PM, Dan Arena wrote:
Gene,
Following up more about xfce4, you should be able to go into their
Settings Manager and you can turn off the Screensaver and uncheck
Power Management under the Advanced tab. You will still want to add
the lines I mentioned before into /etc/X11/xorg.conf to prevent the
screen from going blank though.
I also think it would be a useful feature for LinuxCNC to include an
option where it itself can prevent screensavers. This would not be too
hard for them to do, see https://stackoverflow.com/a/31504731/1941627
A friend also just brought up a good point... do these machines not
have a physical emergency stop button? It seems like with them being
as dangerous as you say they are, they should. I know the couple mills
I have seen do.
I agree with this. There are so many things that could go wrong between
the keyboard and software commanding the machine to stop (swapping
prevents something from getting scheduled, interrupt storm from a rogue
device delays processing, etc.). If this is really a safety critical
feature then everything in the system along this path needs to have
realtime guarantees, redundancy, and follow something like MISRA coding
standards.
It would be *way* easier and cheaper to put a big red stop button on the
machine itself, and bypass this problem of screen locking programs entirely.
I would not recommend relying on the computer for this.
-- Aaron
I would also take this issue up with the LinuxCNC community. Is it
supposed to work like that? Does a new install from the LinuxCNC
"Install DVD" behave the same?
Thanks,
Dan
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