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IDProjectCategoryView StatusLast Update
0009143CentOS-6screenpublic2015-09-28 13:34
Reporterpaavon Assigned To 
Status confirmedResolutionopen 
Product Version6.6 
Summary0009143: Screen command hangs after latest upgrade (4.0.3-18)
DescriptionI have centos-release-cr installed at my CentOS 6 IRC shell and at morning every screen was hanged.

I notice quickly that there was update for screen (nightly installations)
Jul 28 04:34:10 Updated: screen-4.0.3-18.el6.x86_64

Downgrading older screen (4.0.3-16.el6.x86_64) fixed problem and excluded screen from yum.conf.

Also if you start screen by using newer version (4.0.3-18), then downgrading screen, it wont work anymore.

Steps To Reproduce- Run screen (previous version than 4.0.3-18)
- Update screen-4.0.3-18.el6.x86_64
- Try attach (eg. screen -r)

tested with two machines, both have exactly same problem.

TagsNo tags attached.




2015-08-07 11:34

reporter   ~0023807

The issue seems to be a difference in permissions required on /var/run/screen, the one wants 777 and the other wants 775. If an old SCREEN process runs and a new screen -r is done, it fails with the permission error but this is not printed to the terminal so it appears as hanging.

Changing the permissions on the directory doesn't work around the problem either, the new command fails with a permission error.


2015-09-28 12:05

reporter   ~0024473

This problem also happens if you have old screen session < 4.0.3-18 and you try to restore a screen session that was created == 4.0.3-18. Killing old session allowed restoring the new one


2015-09-28 13:34

administrator   ~0024474

I can confirm this unexpected behaviour :(

my current work-around:
1) yum downgrade screen && cp /usr/bin/screen /usr/bin/screen.previous && yum update screen
2) rpm2cio to extract previous /usr/bin/screen (check user/perms) and
make it available as screen.previous

-> use screen.previous to reattach the old screen session
-> use screen for the new ones

Issue History

Date Modified Username Field Change
2015-07-28 07:28 paavon New Issue
2015-08-07 11:34 kokey Note Added: 0023807
2015-09-28 12:05 ritave Note Added: 0024473
2015-09-28 13:34 tru Note Added: 0024474
2015-09-28 13:34 tru Status new => confirmed