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Re: Spurious character typed on console every ~20 secs until logged in




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On Thu, Mar 29, 2018 at 10:10:55AM -0500, David Wright wrote:
> On Thu 29 Mar 2018 at 10:46:17 (+0200), tomas@xxxxxxxxxx wrote:
> > On Thu, Mar 29, 2018 at 08:24:03AM +0000, Curt wrote:
> > 
> > [...]
> 
> Thanks for the ideas. I hadn't come across the virtual buttons.
> 
> I think I'll look at what processes are running by the time it
> tries to mount /home, and which of them might involve looping on
> that timescale.

If it's something in user space, it'd be interesting who has
the console open.

> Then, when it happens again, I'll try a remote login to see if
> I can catch some process at it. It hasn't yet happened (on the
> three occasions) at an opportune time for me to investigate.
> 
> I agree, the first character is probably a NUL. The second is
> probably CR. Both can be used to terminate strings in different
> situations. Or perhaps my termcap has fallen into a 1960s wormhole:
> anyone remember WRU, and the Here Is key, …

Faintly. I also dimly remember about some serial interfaces
sending NULLs when idle, but I can't put my finger on that.

The advantage of old age is that you tend to forget things :)

Cheers
- -- tomás
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