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I just installed ubuntu 14.04 on my thinkpad E555 with AMD R5 M240(kaveri) but i cant find any drivers and i think they are not automatically installed because at system details as Graphics is: Gallium 0.4 on llvmpipe(LLVM 3.5 m 128bits) and the interface is laggy.

Thanks,

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The AMD Radeon R5 M240 seems to require at least Kernel 3.15 and Mesa 10.3. So you have the following options:

  1. Update to Ubuntu 14.10 or newer.
  2. Install a fresh Trusty point release 14.04.2 or

  3. Update your kernel and mesa with LTSEnablementStack, e.g. (using aptitude)

    sudo aptitude install linux-generic-lts-utopic  libgl1-mesa-glx-lts-utopic libegl1-mesa-drivers-lts-utopic

See the bug 1410205 and the explanation of LTSEnhancementStack.

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  • There are kernels 3.16 and 3.19 for 14.04.
    – Pilot6
    Jul 13, 2015 at 19:24
  • Well, probably you could also install mesa 10.3 with Ubuntu 14.04, but with Ubuntu 14.10, it will run out of the box.
    – Codica
    Jul 13, 2015 at 19:33
  • In 14.04.2 it is out of the box. And kernel 3.16.
    – Pilot6
    Jul 13, 2015 at 19:35
  • Thanks to pilot6, I have learnt about LTS Enablement and edited my answer. Hopefully, it is correct.
    – Codica
    Jul 13, 2015 at 20:14
  • Not 100% correct, but not that bad.
    – Pilot6
    Jul 13, 2015 at 20:22

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