In the all the far corners of my screen, I am seeing weird, glitchy dots/errors, in squares of about 2x2 pixels. I am on the most recent version of elementary OS with an nvidia GeForce 9300m and the proprietary nvidia driver version 340.76 (which is the last one supporting my graphics card). I need to keep the proprietary driver for opencl support.
How can I fix these dots? See these screenshots:
Appearently this is an issue with my graphics card and the slightly rounded corners of the elementary interface. There is a bug report here: https://bugs.launchpad.net/elementaryos/+bug/1437468 And a workaround has been proposed here: http://www.reddit.com/r/elementaryos/comments/3aj5hi/there_will_be_4_white_dots_at_corner_after_i_wake/ This won't fix the glitch, but it will disable the rounded corners.
Instructions:
It's not releated to hot corners. It is a problem with your graphic card and the rounded corner mask. You can disable it with d-conf in "org.pantheon.desktop.gala.mask-corners"
I used dconf-editor for this.
If you run following command, white squares will go away.
gsettings set org.pantheon.desktop.gala.mask-corners enable true
I made a custom shortcut to run this command.
