X.Org X server

console owner brings computer to halt when run from X

Bug #60487 reported by Michael Biebl on 2006-09-15

Affects		Status	Importance	Assigned to	Milestone
	X.Org X server	New	Undecided	Unassigned

$ cat /etc/event.d/test
on bounce
exec echo --Bounced--
console owner

Then run
$ start test
from within an X terminal kills effectively the machine. No input is possible anymore, cpu eats 100%

Revision history for this message

Scott James Remnant (Canonical) (canonical-scott) wrote on 2006-09-15:

It's an X bug.

All upstart is doing here is the TIOCSCTTY ioctl on /dev/console

Revision history for this message

Tom Jaeger (thjaeger) wrote on 2009-10-11:

Updated test case, since this issue has re-surfaced in bug #439138:

$ cat /etc/init/test.conf
script
echo test
end script
console owner

Revision history for this message

Wolfgang Kufner (wolfgangkufner) wrote on 2009-10-12:

Tried the updated test case with ubuntu-daily 2009-10-12. Started test in a terminal on the desktop. One CPU jumps to 100% as expected.

Revision history for this message

ilia (ilia) wrote on 2009-10-22:

Comment 122 for bug #439138 have in interesting info regarding console ownership, TIOCSCTTY and 100% CPU usage by X:
https://bugs.launchpad.net/ubuntu/+bug/439138/comments/122

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