Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: screen (Ubuntu)
Status: New => Confirmed
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https://bugs.launchpad.net/bugs/1007658
Title:
Scr
AFAIK screen -ls considers a screen session dead at least when the
server crashed but the socket is still there.
I wonder if the opposite ("SCREEN" server still there as your ps output
shows, but the socket is gone) could be a reason, too, i.e. if the move
from /var/run to /run could be the cause.