Gnome login screen wrong resolution after boot


on my Thinkpad X1C6 after boot the gnome login screen shows me a wrong resolution (i guess 1920x1080) instead of my selected 2560x1440. When i login the resolution changes to the correct 2560x1440 and after wakeup from sleep state the login screen shows the correct resolution 2560x1440. How can i fix that so the gnome login screen has the correct resolution directly after boot?

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