I experienced same issue (with full version) disabling the steam overlay worked.
[code]
Processor Information:
Vendor: AuthenticAMD
Speed: 2900 Mhz
3 logical processors
3 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:
Ubuntu 12.04.1 LTS (64 bit)
Kernel Name: Linux
Kernel Version: 3.2.0-35-generic
X Server vendor: The X.Org Foundation
X Server release: 11103000
Video Card:
Driver: ATI Technologies Inc. ATI Radeon HD 5670
Driver Version: 4.2.11762 Compatibility Profile Context
Desktop Color Depth: 24 bits per pixel
Monitor Refresh Rate: 59 Hz
VendorID: 0x1002
DeviceID: 0x68d8
Number of Monitors: 1
Number of Logical Video Cards: 1
Primary Display Resolution: 1280 x 720
Desktop Resolution: 1280 x 720
Primary Display Size: 23.54" x 13.27" (27.01" diag)
59.8cm x 33.7cm (68.6cm diag)
Primary VRAM Not Detected
Sound card:
Audio device: Realtek ALC662 rev1
Memory:
RAM: 5970 Mb
Miscellaneous:
UI Language: English
LANG: en_US.UTF-8
Microphone: Not set
Total Hard Disk Space Available: 117133 Mb
Largest Free Hard Disk Block: 39108 Mb
Installed software:
Recent Failure Reports:
Sun Dec 30 03:24:19 2012 GMT: file ''/tmp/dumps/assert_20121229222408_1.dmp'', upload yes: ''CrashID=bp-0da63f34-d5c7-465b-929b-383db2121229'' [/code]
There have been some overlay updates since this was opened. Does it still fail with the overlay enabled but work with the overlay disabled?
Closing pending confirmation the bug is still active.
The bug is fixed - it works with the community overlay enabled
Nothing extracted yet.
The game demo doesn't launch due to, presumably, an X error.
Log in the following gist: https://gist.github.com/4366970