Update your Mesa to 9.0+ version. Check https://wiki.ubuntu.com/Valve
For the best results, you should install AMD proprietary driver.
The last time I tried the AMD proprietary driver it didn't support multi-monitor well, so I reverted back to open source driver.
OK, try to update Mesa and give us a feedback.
Thanks
Nothing extracted yet.
After resuming from the Steam community in-game overlay while playing CS 1.6, most textures turned white.
Image: http://ubuntuone.com/5Oebd02meBs0euWbTgxD4H
Processor Information:
Vendor: GenuineIntel
Speed: 2794 Mhz
8 logical processors
4 physical processors
HyperThreading: Supported
FCMOV: Supported
SSE2: Supported
SSE3: Supported
SSSE3: Supported
SSE4a: Unsupported
SSE41: Supported
SSE42: Supported
Network Information:
Network Speed:
Operating System Version:
Ubuntu 12.04.1 LTS (64 bit)
Kernel Name: Linux
Kernel Version: 3.2.0-36-generic
X Server vendor: The X.Org Foundation
X Server release: 11103000
Video Card:
Driver: X.Org Gallium 0.4 on AMD JUNIPER
Sound card:
Audio device: Realtek ALC888
Memory:
RAM: 12010 Mb
Miscellaneous:
UI Language: English
LANG: en_US.UTF-8
Microphone: Not set
Total Hard Disk Space Available: 56242 Mb
Largest Free Hard Disk Block: 9354 Mb
Installed software:
Recent Failure Reports: