How to disable magnifier at login screen ?

[rostamiani]

The problem solved
I used these commands :

sudo service gdm stop
sudo X -configure

But I should do these steps before every logins !
all items at "System->Preferences->Assistive Technologies" are disabled !

[rostamiani]

Should I reinstall ubuntu ???

[waspinator]

if you can log in using the terminal (ctrl+alt+f1), type in

sudo apt-get remove --purge gnome-mag

That should fix it

EDIT. wrong command. try the corrected version. let me know if it works for you

[rostamiani]

if you can log in using the terminal (ctrl+alt+f1), type in

sudo apt-get remove --purge gdm-mag

That should fix it

Thanks a lot
I'll try now

[rostamiani]

It didn't work
This error occured :

E: Couldn't find package gdm-mag

[waspinator]

sorry I made a mistake. Try the corrected version. report back.

sudo apt-get remove --purge gnome-mag

[rostamiani]

sorry I made a mistake. Try the corrected version. report back.

sudo apt-get remove --purge gnome-mag

Thanks a lot
The problem solved

[LewtenantDan]

Ok, so it's a simple fix. It involves no code and no removal of any software.

The magnifier covers half of the screen, but it doesn't disable the half of the screen it is covering. I had the same problem and after clicking in the dark along the taskbar for a little while, I was able to bring up the accessibility options dialogue box again and low and behold, screen magnifier was still checked. The accessibility preferences button is about 1/6 of the way across the screen from the right edge. Click on the taskbar in that area, then move the mouse just above the taskbar and to the left a bit and click again. You should see the dialogue box pop up. Uncheck the box and you're good to go You may need to feel around in the dark a bit, but you'll get it as long as you bring the mouse up and left every time after you click on the taskbar. Good luck, it worked for me!

EDIT::removing the gnome-mag software in recovery mode is an option, but if you ever reinstall it, it will automatically pop back up on the login screen, so taking 5-10 minutes to attack the source of the problem instead of just deleting it is probably your best bet.

[warrencaldwell]

Ok, so it's a simple fix. It involves no code and no removal of any software.

The magnifier covers half of the screen, but it doesn't disable the half of the screen it is covering. I had the same problem and after clicking in the dark along the taskbar for a little while, I was able to bring up the accessibility options dialogue box again and low and behold, screen magnifier was still checked. The accessibility preferences button is about 1/6 of the way across the screen from the right edge. Click on the taskbar in that area, then move the mouse just above the taskbar and to the left a bit and click again. You should see the dialogue box pop up. Uncheck the box and you're good to go You may need to feel around in the dark a bit, but you'll get it as long as you bring the mouse up and left every time after you click on the taskbar. Good luck, it worked for me!

This worked for me, thanks. The only addition I would make is that you don't have to 'feel around in the dark' to bring up the accessibility menu. On my screen I can still see the left half of the login dialog box on the unmagnified left half of the screen, and if you click slowly along the bottom right side of the screen, you can tell when you hit the accessibility button because the login dialog box un-highlights. Then, as LD says, click once more up and left (I got it first try) to bring up the options box. Worked like a charm.

[andrewsomething]

Here's a quick one liner that seems to work for me:

sudo -u gdm gconftool-2 /desktop/gnome/applications/at/screen_magnifier_enabled --type bool --set false