'Half-Life 2: Deathmatch' runs mediocre for me at best. On the maps I play on, the video quality ranges from somewhat to very choppy. This wasn't the case when previously using an Nvidia GeForce GT 240 graphics card. The audio is fine. The low frame rates sometimes improve when I go to the outer limits of the map and face a wall.
Regardless, thank you, AMD Linux developers, for working at improving the drivers.
Ubuntu 12.04.4, 64-bit
Unity Desktop Environment (vanilla)
Asus M4A78LT-M LE Motherboard
Asus BIOS Version 0803
AMD Athlon II X4 645, 3.10 GHz
AMD Radeon HD 6790
Catalyst Control Center Version 2.20
ATI/AMD Proprietary FGLRX Graphics Driver (**Experimental** Beta)