Installing ATI Radeon HD 6870 on a 2560x1080 monitor on Ubuntu 10.04 (focal)


Hardware info

lshw -c video


       description: VGA compatible controller
       product: Barts XT [Radeon HD 6870]
       vendor: Advanced Micro Devices, Inc. [AMD/ATI]
       physical id: 0
       bus info: pci@0000:02:00.0
       version: 00
       width: 64 bits
       clock: 33MHz
       capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
       configuration: driver=radeon latency=0
       resources: irq:37 memory:d0000000-dfffffff memory:fbbc0000-fbbdffff ioport:b000(size=256) memory:c0000-dffff


lspci -k | grep -EA2 'VGA|3D'

02:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Barts XT [Radeon HD 6870]
    Subsystem: Advanced Micro Devices, Inc. [AMD/ATI] Barts XT [Radeon HD 6870]
    Kernel driver in use: radeon


linux-hardware: AMD Radeon HD 6870


=Removing old drivers (for nvidia card)=

sudo apt-get remove --purge '^nvidia-.*'

sudo apt-get install --reinstall xserver-xorg-video-intel libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core

sudo dpkg-reconfigure xserver-xorg

sudo mv /etc/X11/xorg.conf /etc/X11/xorg.conf.bak


=Video Drivers=

  • Use "radeon" driver
  • "amdgpu" incompatable (only newer cards)
  • "amdgpu-pro" incompatable (only newer cards)
  • "frglx", obsolete, unmaintained since Ubuntu 12 or 13 or so



  • DVI(Single Link) doesnt support greater than 1920x1080(FHD)
  • DVI(Dual Link) might work, i didn't have one
  • HDMI didn't support greater than 1920x1080(FHD), I guess the graphics card uses an older version of HDMI
  • DisplayPort: I had to use a mini-Display Port(miniDP) to Display Port(DP) cable to get the full resolution


Check for Errors


dmesg | egrep 'drm|radeon'



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