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Ubuntu 60% loss in hashrates after security updates for Spectre/Meltdown vulnerabilities RX580

Question asked by ltpdttcdft on Jan 11, 2018
Latest reply on Mar 4, 2018 by tekcommnv

Lubuntu 16.04 with AMDGPU-PRO Beta Mining Driver 17.40 (October 16th, 2017) installed.

Sapphire Nitro Plus RX 580 8GB. With mining bios mods it was hashing around 29-30Mh/s on Eth for several days (using ethminer from ). Also XMR at 840-850h/s (using xmr-stak from ).

After the security updates for the Meltdown/Spectre/etc vulnerabilities were installed today, the Eth hashrate dropped to 21 Mh/s. XMR at 350h/s. It looks like the mining driver is incompatible with the patched kernel.

What do?