I have just bought an R9 270, and I am trying to get it working on Debian Wheezy alongside my 6770.
I am using the latest 13.11 Beta drivers.
The output of lspci is:
01:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Juniper XT [AMD Radeon HD 6000 Series]
02:00.0 VGA compatible controller: Advanced Micro Devices [AMD] nee ATI Device 6811
display: :0 screen: 0
OpenGL vendor string: Advanced Micro Devices, Inc.
OpenGL renderer string: AMD Radeon HD 6700 Series
OpenGL version string: 4.3.12614 Compatibility Profile Context 13.25.18
Also, my second monitor on the 6770 is buggy (doesn't render windows properly) on Gnome 3.
Has anyone had any luck with this?
Have had alot! of issues with that driver. just install the 13.4 driver and your good to go. the R9 270 is just a reworked HD 7870 so install 13.4.
Could need some more info on the software if you want advanced debug assistance on.