I'm actually using Ubuntu 16.04 and I having bad performance with my ATI Radeon HD7870. This is a discrete Videocard but I can't even run without stuttering 3d-rendered page. I'm actually using the basic driver that comes with Ubuntu.
What can I do?
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There is beta (?) support for the GCN 1 family of AMD chips (which includes your HD7870) in the amdgpu driver, which is noticeably better than the radeon driver (which Ubuntu uses by default for < GCN 3 chips). Unfortunately at this point in time, this requires you to compile the kernel yourself. If someone is willing to outline how to do this, feel free to expand this comment into a full answer– 小太郎Jan 5, 2017 at 14:39
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1 Answer
You can try installing the drivers from the PPA of oibaf which are more up to date
for that you need to open a terminal and use the following commands
sudo add-apt-repository ppa:oibaf/graphics-drivers
after the ppa was added you only need to update and upgrade your system if you use the opensource drivers
sudo apt update && sudo apt upgrade
you will be prompted to confirm the upgrades and after a restart you should use the latest drivers of the ppa
to remove the ppa and drivers following commands would be used
sudo apt-get install ppa-purge
and
sudo ppa-purge ppa:oibaf/graphics-drivers
to remove the ppa
after that
sudo apt update && sudo apt upgrade
to apply the changes
alternatively you can try leaner desktop's to get more performance like mate lxde or xfce
