Bug#918764: udev: "udevadm control --reload-rules" kills all processes except init

[Axel Beckert]

Control: found -1 240-5

Hi again,

Axel Beckert wrote:
> Another case which predates my original bug report by a few weeks
> (week before christmas or maybe even mid-december), but which I now
> noticed that it had the exact same symptoms:
> 
> I have three screens connected to my workstation:
> 
> 1x DisplayPort
> 1x HDMI
> 1x DVI-D
> 
> All three screens are powered via the same switchable power strip.
> Everything was fine when I powered all three screens of by turning of
> the powerstrip.
> 
> But when I powered them on again by turning on the power strip again,
> the machine showed the same symptoms. I remember that because I was
> confused that the machine just "crashed" that moment I wanted to use
> it again after a long weekend where I was only logged in remotely, if
> at all.

This is now confirmed to be the same issue. If I power on my three
screens via a mechanical power switch in the power strip, it kills all
my processes. (Maybe only one of them is the cause, please ping if
this might be relevant, otherwise I won't test more details.)

> I also plan to check if my "does not happen in the first 20 minutes
> after reboot" is actually the "does not happen until udev is restarted
> at least once after reboot" mentioned by some other victim of this
> bug.

Also verified. "udevadm control --reload-rules" doesn't kill processes
directly after reboot (tested with 4.20-1~exp1), but as soon as I've
called "service udev restart", the next "udevadm control
--reload-rules" kill's all processes again.

> And if that's the case and powering on a monitor triggers it, too, it
> looks to me as this indeed a bug in udev.

Looks like it, yes, but in the meanwhile I was also able to stop this
issue by uinstalling some other packages. I though still haven't
figured out which package exactly is relevant.

Will sent another mail with details once I've figured out the details.

But I already want to say thanks to Gedalya for giving the right hints
on that! :-)

		Regards, Axel
-- 
 ,''`.  |  Axel Beckert <abe at debian.org>, https://people.debian.org/~abe/
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