What I expected to happen was...:
After clicking play from the launcher, I expected to see the title screen in the window.
What actually happened was...:
The Mojang logo appeared as usual, then the entire screen went black with the arrow cursor visible.
I noted that pointing the arrow at the bottom of the screen to show the dock resulted in a partial drawing of the expected menu screen roughly the same size and shape of the dock.
Steps to Reproduce:
1. Start Launcher 1.2.5
2. Click Play button
Related issues
duplicates
Attachments
Comments

excerpt from console
Client> Initializing LWJGL OpenAL
Client> (The LWJGL binding of OpenAL. For more information, see http://www.lwjgl.org)
Client> OpenAL initialized.
Client>
Client> 2013-09-26 23:36:32 [CLIENT] [SEVERE] ########## GL ERROR ##########
Client> 2013-09-26 23:36:32 [CLIENT] [SEVERE] @ Post startup
Client> 2013-09-26 23:36:32 [CLIENT] [SEVERE] 1281: Invalid value
Client> 2013-09-26 23:36:33 [CLIENT] [SEVERE] ########## GL ERROR ##########
Client> 2013-09-26 23:36:33 [CLIENT] [SEVERE] @ Pre render
Client> 2013-09-26 23:36:33 [CLIENT] [SEVERE] 1281: Invalid value
Client> 2013-09-26 23:36:37 [CLIENT] [INFO] Stopping!
Client>
Client> SoundSystem shutting down...
I was able to successfully start Minecraft by editing options.txt.
changed fullscreen to "false"
The GL error message in the console persists however.

Duplicate of MC-21603