I have installed Ubuntu 16.04 final beta on a Dell Inspiron 15 5000 Series (Intel(R)) - 5559. This laptop has a AMD Radeon(TM) R5 M335 4GB DDR3 GPU.
I am unable to tell if it is being used or not. Indeed, the open source drivers module seems to be loaded:
$> lsmod | grep radeon radeon 1511424 1 i2c_algo_bit 16384 2 i915_bpo,radeon ttm 98304 1 radeon drm_kms_helper 139264 2 i915_bpo,radeon drm 360448 9 ttm,i915_bpo,drm_kms_helper,radeon
however, I expected to see it listed in lspci, while there only seems to be the integrated intel card:
$> lspci | grep -i graphic 00:02.0 VGA compatible controller: Intel Corporation Sky Lake Integrated Graphics (rev 07)
Also, I have installed the
radeontop utility but it outputs:
Can't find Radeon cards
I don't know if it's relevant, but OpenGL seems to be working:
$> glxinfo | grep direct direct rendering: Yes GL_ARB_direct_state_access, GL_ARB_draw_buffers, GL_ARB_draw_indirect, GL_ARB_draw_instanced, GL_ARB_map_buffer_range, GL_ARB_multi_bind, GL_ARB_multi_draw_indirect,
but still I don't know if it's the intel or the radeon card taking care of it.
I have never tried older versions of ubuntu on this laptop, so I have never tried the - now deprecated - proprietary drivers.
How can I tell if my graphic card is working? If it's not, how can I make it work again?