My core Comment module is gone Recently I lost comments and everything related. In the module list I see "Comment (missing)". All I did before:


CK editor update  
Installed the Better Formats module.


Manual updating the core from 7.27 to 7.28 didn't help. All comment module files are in the folder they suppose to be (modules/comment/). But Drupal doesn't see the module.  

Any help would be appreciated.
If the comment module files are there in /modules/comment but not displayed in Admin > Modules it suggests the folder isn't readable by the webserver user.

Check the permissions are correct on the /modules/comment folder to allow read access.

For example:

# Run from Drupal root
# Comment module folder ensure readable
chmod 755 modules/comment
# Recursive chmod on files to ensure readable
find modules/comment -type f -exec chmod 644 {} \;