Hi! This bug started when I upgraded to Yosemite. It could have been from Mavericks but I'm pretty sure since Yosemite. I have a Mid 2012 rMBP 15", with Intel HD4000 and Geforce GT 650M. When I had GPU-switching on I had the same problem, but now I only use the dedicated graphics card. The issue is that when I boot up my computer, the login screen is in an incorrect resolution. Everything's much bigger. I run my retina macbook in scaled 1920x1200 and I think the login screen is in native retina-mode (looks like 1440x900). Another issue is that because of this (I think) there is a bug with the password field. If I click on my user profile picture nothing happens when I type something in the password field. I have to exit the user-login-mode and re-click my profile picture. The only way to make it work is to click it WHILE I'm typing random characters. Then it till take my input so I can erase and rewrite my password. It's just like there's a small window where it takes my input, just after I click the picture. Any thoughts? Thanks.