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Date: Sat, 29 Nov 2014 19:03:21 -0700 (MST)
From: Warren Block <wblock@wonkity.com>
To: "John F. Carr" <jfc@mit.edu>
Subject: Re: Radeon troubles
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On Sat, 29 Nov 2014, John F. Carr wrote:

> There are two problems:
>
> 1. When X exits the screen never switches back to console mode.
> It freezes with the image on the X server when it exits.  The text
> console is running behind the frozen graphics.  I can login blind as
> root and reboot.  I can rerun xinit and see my compressed windows
> again.  But I can't see the console.  (I don't use graphical login.
> I log in on the console and run xinit.)

Add to /boot/loader.conf:
   kern.vty=vt

See vt(4) for more information.

> 2. On a PA272W 2560x1440 monitor the image is horizontally compressed
> into the middle half of the screen.  The image is mangled as I would
> if half of the pixels were dropped.  I think it is trying to display
> 2560 pixels but setting up some mode parameters wrong.  On a lower
> resolution monitor the image is fine, but see item 1.

Not really sure about that, it might depend on the type of cable 
connection, like dual-link DVI being required.