Problem Description:
I get a flat green screen at launch. I have to drop to console ctrl+alt+f1 then go back to X, alt+f8 to get the graphical overlay to come up properly. This is also now happening when I quick load a game but sometimes when it happens at quick load I can't drop to console and get the overlay to come back. Also noticed that quick saving does not work at all any longer.

Additionally sometimes when I try to quick load a notification popup appears, a circle with a cross through it. It looks like something from my notification daemon which is not the typical notification daemon. I changed my notification daemon due to similar problems in XBMC. My currently installed notification daemon package is simply:

notification-daemon

This daemon has been the least intrusive of all notification daemons available in conjunction with Linux Mint 13. From what I understand it follows specifications quite succinctly. It is described thus in the package manager:

notification-daemon displays passive pop-up notifications, as per the Desktop Notifications Specification.

The Desktop Notifications Specification provides a standard way of doing passive pop-up notifications on the Linux desktop. These are designed to notify the user of something without interrupting their work with a dialog box that they must close. Passive popups can automatically disappear after a short period of time.

Workarounds:
None known. Launched from Menu instead of Steam client and issue was worse. Was unable to get the graphical overlay to come up at all.

Processor Information:
    Vendor:  AuthenticAMD
    Speed: 1000 Mhz
    2 logical processors
    2 physical processors
    HyperThreading:  Unsupported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Supported
    SSE4a:  Supported
    SSE41:  Unsupported
    SSE42:  Unsupported

Network Information:
    Network Speed:  

Operating System Version:
    Linux Mint 13 Maya (64 bit)
    Kernel Name:  Linux
    Kernel Version:  3.2.0-37-generic
    X Server vendor:  The X.Org Foundation
    X Server release:  11103000

Video Card:
    Driver:  ATI Technologies Inc. AMD Radeon HD 6290 Graphics

    Driver Version:  4.2.11931 Compatibility Profile Context
    Desktop Color Depth: 24 bits per pixel
    Monitor Refresh Rate: 60 Hz
    VendorID:  0x1002
    DeviceID:  0x9807
    Number of Monitors:  1
    Number of Logical Video Cards:  1
    Primary Display Resolution:  1366 x 768
    Desktop Resolution: 1366 x 768
    Primary Display Size: 10,08" x 5,67"  (11,54" diag)
                                            25,6cm x 14,4cm  (29,3cm diag)
    Primary VRAM Not Detected

Sound card:
    Audio device: ATI R6xx HDMI

Memory:
    RAM:  3680 Mb

Miscellaneous:
    UI Language:  English
    LANG:  is_IS.UTF-8
    Microphone:  Not set
    Total Hard Disk Space Available:  388781 Mb
    Largest Free Hard Disk Block:  89793 Mb

Installed software:

Recent Failure Reports:
    Wed Feb 13 15:50:16 2013 GMT: file ''/tmp/dumps/assert_20130213155015_1.dmp'', upload yes: ''CrashID=bp-83b50433-878f-4505-8a17-456092130213''
    Wed Feb 13 16:07:15 2013 GMT: file ''/tmp/dumps/assert_20130213160714_1.dmp'', upload yes: ''CrashID=bp-bc442fff-1de7-411e-91ed-a94292130213''
    Thu Feb 14 10:00:59 2013 GMT: file ''/tmp/dumps/crash_20130214100054_1.dmp'', upload yes: ''CrashID=bp-847be880-e0be-4945-abcc-dea742130214''