Please include the system information requested at https://github.com/ValveSoftware/steam-for-linux#reporting-issues
Sorry, to be clear this is already reproduced; I was mostly logging this because it's a corner-case that I need to remember to look at eventually. Assigning.
Issue transferred to ValveSoftware/Source-1-Games#138.
This issue is closed - continue conversation there.
Nothing extracted yet.
Running Team Fortress 2 at 4960x1600, what appears to be a bloom or HDR contribution buffer gets composited to the final scene in the upper-left corner instead of full screen. This is especially noticeable when standing under a light at maxed settings, such as the ready room for Dustbowl. Please disregard the clipping on the right in this example screenshot as my window was partially obscured:
http://i.imgur.com/BTIKKm3.jpg