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lplacencia Author

Level 1

2 points

Permissions problem in displaypolicyd

I'm having a very strange problem with Yosemite 10.10 (14A389) on my MacBook Pro (13-inch, Mid 2009). Waking from sleep the monitor receives no signal.

The only problems I have come across is a few permission errors:

User differs on private/var/db/displaypolicyd; should be 0; user is 244.

Group differs on private/var/db/displaypolicyd; should be 0; group is 244.

sudo chown -R root /private/var/db/displaypolicyd && sudo chgrp -R wheel /private/var/db/displaypolicyd

sudo diskutil repairPermissions /

After repairing permissions problem reappears after a reboot.

MacBook Pro (13-inch Mid 2009), OS X Yosemite (10.10)

Posted on Oct 23, 2014 2:39 PM

Top-ranking reply

lplacencia Author

Level 1

2 points

Posted on Oct 24, 2014 4:41 AM

My temporary solution

1 - Create a shell script example: fixesPermissions.sh

sudo chown -R root /private/var/db/displaypolicyd && sudo chgrp -R wheel /private/var/db/displaypolicyd

2 - Path in my case

/etc

3 - Allow my user to run the script without root password

sudo nano /etc/sudoers

below the line

# Samples

# %users ALL=/sbin/mount /cdrom,/sbin/umount /cdrom

# %users localhost=/sbin/shutdown -h now

add line

myuser ALL=NOPASSWD: /etc/fixesPermissions.sh

key cmd + x

key y

key cmd + m

4 - Run the shell script when my user logs

sudo defaults write com.apple.loginwindow LoginHook /etc/fixesPermissions.sh

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99 replies

KHAANNN

Level 1

9 points

Nov 23, 2014 5:25 PM in response to lplacencia

I'm really glad I came across this issue, I think we're all sharing a similar issue that pre-dates Yosemite, here's why

When I got my macbook brand new (discrete graphics / mid 2014 model, 1 month ago), it had some issues initially, it almost halted to a stop during setup, which is not unseen, yet uncommon, wish I re-installed things then, I've seen other people mentioning mavericks/lion issues, so I think we all had the cause at that time

Now after upgrading to Yosemite, the issue is still around, for me it manifests itself as erratic dock behaviour, dock moves to the second monitor sometimes, multi-touch gestures stop working etc.

Nov 24, 2014 7:11 AM in response to KHAANNN

Just starting having this issue with a new riMac yesterday, and not the computer is completely unusable.

I can VNC in and access the desktop, and it thinks it's connected to a 18" monitor for some reason. Repaired file permissions with disk utility, but the screen is still not detected properly. Restarted the computer, but the permissions on displaypolicyd are messed up again. I see the file vault login screen, and the progress indicator screen, but once it's time to show the desktop the screen goes blank.

Tried resetting the PRAM as well, but that didn't help.

What do I do?

Nov 25, 2014 3:03 AM in response to lplacencia

nothing changes ( every reboot - every time need to repair permissions (

Nov 25, 2014 3:06 AM in response to Coral Reef

Yeah I finally caved in here and wiped the partition and reinstalled. :/

KHAANNN

Level 1

9 points

Nov 25, 2014 3:09 AM in response to Christian Arild Strømmen

Did it solve the issue?

On the macrumors thread someone reported the issue also happens at clean installs

Nov 25, 2014 3:33 AM in response to Coral Reef

I observed that If I repair my permissions with Disk Utility the problem repeats itself.

It's been two days now since I last repaired my permissions and haven't experienced the problem with my internal display.

I decided not to repair my permissions and so far so good.

Nov 25, 2014 3:33 AM in response to KHAANNN

Well I got it back up and running here now without it happening.

Interestingly I just realized exactly when the problem started happening. It was when after I tried to change the resolution for the first time (to a scaled one).

sky13net

Level 1

0 points

Dec 13, 2014 1:49 PM in response to lplacencia

This helped me - AirServer.app delete/quit

Dec 14, 2014 1:10 AM in response to sky13net

Oh man, I had AirServer installed as well. That might also have been my problem.

Dec 24, 2014 7:23 AM in response to dr_click

I have this same problem: can't log back in after sleep and displaypolicyd errors when repairing permissions.

My work-around is to uninstall DropBox. I still see the displaypolicyd permission errors when checking; but, I can now log in every time. That's a pain for me because I have some applications that require DropBox for syncing. :-/

Dec 24, 2014 8:37 AM in response to SmithersJr

make sure you have the latest dropbox. they released it a few months after the yosemite release to deal with yosemite related issues. so far it has worked like a charm.

Dec 24, 2014 8:48 AM in response to larisa pedroncell

I updated Dropbox to 3.0.3 a few weeks ago. It seemed to help for a bit; but, it didn't last. I see 3.0.4 is out now, so I'll give that a try.

Dec 25, 2014 9:05 AM in response to SmithersJr

Nope, Dropbox 3.0.4 is doing the same thing. :-(

Goodbye, Dropbox. :-/

kraen

Level 1

9 points

Dec 28, 2014 4:31 AM in response to lplacencia

I have the same problem on a MBP early 2011. First thought it was the graphics card issue others have encountered but I can log into the computer via Safe Mode without problems. But when I log into the computer as usual it crashes after a certain amount of time.

It's not totally clear in my case if the repair permissions trick is doing the job but I will continue trying.

I'm on 10.10.1 and Dropbox has been uninstalled. Issue still present.

kraen

Level 1

9 points

Dec 28, 2014 6:49 AM in response to kraen

Dropbox installed. Repaired permissions. Running fine.

I haven't tried putting the MBP to sleep yet, though.

Permissions problem in displaypolicyd