How to disable mirror display at login screen?

[bluedoggiant]

Hey all,
So my rMBP is set to extend the display to an external display, and that works fine except at the login screen. I have tried CMD+F1 but that only temporarily fixes the problem until the next reboot. Anyway to change a permanent setting?

 

[LevMac]

Not sure if its the same issue I'm having, I have my Cinema Display connected to my MacBook Pro, after shutting down and turning back on, the log in screen appears on my MacBook Pro when I want it to appear on my Cinema Display, how do I fix this?

 

[bluedoggiant]

Not sure if its the same issue I'm having, I have my Cinema Display connected to my MacBook Pro, after shutting down and turning back on, the log in screen appears on my MacBook Pro when I want it to appear on my Cinema Display, how do I fix this?

Not the same issue but very related.

A lot of people seem to be having issues with external displays and the login screen. One way or another, their usual preferences are not sticking.

 

[sman591]

I'm having the same issue. Would love to know if there's a workaround if this is the default behavior.

 

[bluedoggiant]

This bug seems to keep creating spaces each time I log in in mission control.

Anyone else having this issue?

 

[CoBrA2168]

This bug seems to keep creating spaces each time I log in in mission control.

Anyone else having this issue?

Hackintoshers with Yosemite are running into the same issue.

I can't seem to pinpoint what is causing the problem or how to fix it permanently. I do, however, find out that for some reason if I do Settings->Energy Saver->Restore Defaults, this problem goes away. But it will eventually come back.

I will update this thread if I can figure anything else out.

 

[bluedoggiant]

Hackintoshers with Yosemite are running into the same issue.

I can't seem to pinpoint what is causing the problem or how to fix it permanently. I do, however, find out that for some reason if I do Settings->Energy Saver->Restore Defaults, this problem goes away. But it will eventually come back.

I will update this thread if I can figure anything else out.

I am not a hackintosher.

Someone else told me to try that but it doesn't work.

 

[LevMac]

This bug seems to keep creating spaces each time I log in in mission control.

Anyone else having this issue?

Yep having exactly the same problem!
My log in screen appears on my MacBook Pro instead of on my Cinema Display, and as I type my password and hit enter, mission control/spaces comes up on my Cinema Display then quickly goes away....

 

[CoBrA2168]

Here are some other threads you guys can follow on this problem:
http://www.insanelymac.com/forum/to...ror-mode-at-login-but-normal-after-logged-in/
http://www.hackintoshosx.com/topic/22248-login-screen-stuck-in-mirrored-mode/
http://www.tonymacx86.com/graphics/...y-login-screen-after-installing-yosemite.html

I'm following all 3 of those (and this one) hoping that someone figures it out.

 

[nospam2k]

Hey all,
So my rMBP is set to extend the display to an external display, and that works fine except at the login screen. I have tried CMD+F1 but that only temporarily fixes the problem until the next reboot. Anyway to change a permanent setting?

Same problem here. Not Hackintosh. MBP Retina. Didn't do this with Mavericks.

 

[CoBrA2168]

Same problem here. Not Hackintosh. MBP Retina. Didn't do this with Mavericks.

Just curious, is your MBP also using discrete graphics or are you using the Intel Iris Pro graphics?

 

[nospam2k]

Just curious, is your MBP also using discrete graphics or are you using the Intel Iris Pro graphics?

I'm not sure about that. The 2nd monitor is using the HDMI port.

 

[bluedoggiant]

I'm not sure about that. The 2nd monitor is using the HDMI port.

Do you have a top of the line MBP

 

[nospam2k]

Do you have a top of the line MBP

MBP Retina 15" Late 2013, 2.3ghz i7, nvidia geforce gt 750m. I just don't know the answer as to which GPU is live (intel/nvidia) when at login through hdmi.

 

[bluedoggiant]

MBP Retina 15" Late 2013, 2.3ghz i7, nvidia geforce gt 750m. I just don't know the answer as to which GPU is live (intel/nvidia) when at login through hdmi.

It is the Nvidia card.

I don't think it matters anyway.

 

[CoBrA2168]

Based on the research I've done, I think it does not matter if you're using dedicated graphics (Nvidia) or integrated (Intel). What does seem to matter is if people are using HDMI. It seems that almost everyone with this issue is using HDMI.

If anyone with this issue is not using HDMI for one of the monitors, please let me know. Still trying to work on a solution.

 

[bluedoggiant]

Based on the research I've done, I think it does not matter if you're using dedicated graphics (Nvidia) or integrated (Intel). What does seem to matter is if people are using HDMI. It seems that almost everyone with this issue is using HDMI.

If anyone with this issue is not using HDMI for one of the monitors, please let me know. Still trying to work on a solution.

Using HDMI

 

[3square]

same, using HDMI along with display port and 2 DVI.

i'll try it without the HDMI and report back

 

[bluedoggiant]

Anyone else having issues with desktop wallpapers changing?

 

[bluedoggiant]

This has not been fixed by the update.

 

[ericsvizeny]

I know this is a really old thread..but I have the same issue with my new 2017 iMac pro. Did you ever find a fix? This is so frustrating.

 

[2010cluehunt]

From https://apple.stackexchange.com/a/85801

I recommend you reset your NVRAM. This chip stores information on screen resolution and can often become corrupted. You can reset it by starting your Mac while holding down cmd + opt + P + R . You should hear the Mac chime, restart and chime a second time. Then you can release the keys you are holding. More info here.