Greetings!
OS Ubuntu 16.04
Driver 16.40 (16.50)
GPU AMD R9 290X, Gigabyte R9 380X
These cards have this output in dmesg:
efi: EFI v2.31 by American Megatrends
ACPI: UEFI 0x00000000DE7CE718 000042 (v01 ALASKA A M I 01072009 00000000)
fb0: EFI VGA frame buffer device
EFI Variables Facility v0.08 2004-May-17
fb: switching to amdgpudrmfb from EFI VGA
The problem is with the cards where framebuffer is EFI (not UEFI)
Question: Why does every miner will load the EFI card only by 5-10%? (hashrate VERY low)
(the UEFI cards are working good on this mobo)
Cards are 100% working good (tested on another mobo)!
Current MoBo is OK, checked with other cards (fb: switching to amdgpudrmfb from VESA VGA)
* -display
description: VGA compatible controller
product: Amethyst XT [Radeon R9 380X]
vendor: Advanced Micro Devices, Inc. [AMD / ATI]
physical id: 0
bus info: pci @ 0000: 01: 00.0
version: f1
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver = amdgpu latency = 0
resources: irq: 27 memory: e0000000-efffffff memory: f0000000-f01fffff ioport: e000 (size = 256) memory: f7e00000-f7e3ffff memory: f7e40000-f7e5ffff
* -display
description: VGA compatible controller
product: Hawaii PRO [Radeon R9 290]
vendor: Advanced Micro Devices, Inc. [AMD / ATI]
physical id: 0
bus info: pci @ 0000: 09: 00.0
version: 80
width: 64 bits
clock: 33MHz
capabilities: pm pciexpress msi vga_controller bus_master cap_list rom
configuration: driver = amdgpu latency = 0
resources: irq: 35 memory: 20000000-2fffffff memory: 30000000-307fffff ioport: 7000 (size = 256) memory: f7700000-f773ffff