Questions[ethereum](ubuntu)

I'm trying to switch over back to Linux (as my primary OS at least) and one thing that's annoying now is mining etherium. On Windows even with 99% GPU usage everything runs perfectly fine and I can still watch YouTube and work on things without taking much of a performance hit but on vanilla Ubuntu the entire PC starts lagging and eventually freezes to a point of no return.

Is there any way I could limit the maximum GPU usage for every process? (I'm mining using Salad.io which is still in beta for Linux but it's basically just a wrapper for PhoenixMiner)

I am using the following link to install Oyente tool

I have got Python 3.6.9 installed on my Ubuntu 18.04/. When I am running the command pip2, I am getting error messages:

    zulfi@lc2530hz:~$ python3 --version
Python 3.6.9
zulfi@lc2530hz:~$ source envsp/bin/activate
(envsp) zulfi@lc2530hz:~$ pip2 install oyente
DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support
Collecting oyente
  Using cached https://files.pythonhosted.org/packages/13/3c/52b8dee604cbdf35c1d65a141b779d9c14c8d313251c697b40a93f58d3d5/oyente-0.2.7-py2-none-any.whl
Collecting web3
  Using cached https://files.pythonhosted.org/packages/85/01/eacb73ae16364295bf26cba4aacc94e513f5feae54dbb5f8121bec697e49/web3-4.8.1.tar.gz
ERROR: Package 'web3' requires a different Python: 2.7.15 not in '>=3.5.3,<4'
(envsp) zulfi@lc2530hz:~$ 

Somebody please guide me how to solve this error.

Zulfi.

Update Did some further digging and found out the solution to this problem for the old fglrx driver: https://bitcointalk.org/index.php?topic=170470.60 This however does not work with the AMDGPU drivers, which don’t come with switchlibglx prepackaged as far as I know.

Update 2 — Found this possible solution but it didn’t work. Getting either one of 2 things: A, a black screen when I run systemctl isolate graphical.target, or B, if I proceed to blacklist the driver, the inability to mine.

Update 3 Opened /var/log/Xorg.0.log in a VT (with systemd default temporarily set to multi-user.target while this problem persists) ― extremely bizarre "no screens found" error. Wonder if AMDGPU drivers are actually trying to force X to use them on startup; hopefully not.

Update 4 Found these instructions in the Arch Linux forums when researching the exact message re: not finding any displays — now, instead of exiting abnormally, the system simply hangs when I try to run startx. An improvement, but still doesn’t work.

Update 5 The above hang happens for about 5 minutes, then it exits with a “Connection refused” error. Pulled up ~/.local/share/xorg/Xorg.0.log — it actually says “Server terminated successfully” despite startx output saying that’s what needs to be consulted.

Update 6 Googling site:bugs.launchpad.net "amdgpu" turned up this bug report which may be related to this problem. Attempted the workaround there ― nope, didn't work.

Update 7 Running journalctl | grep gdm | grep EE | less turned up some rather valuable information in helping solve this problem:

(EE) open /dev/fb0: Permission denied

WTF is the AMDGPU driver doing to the permissions on the framebuffer?

Update 8 Still no solution; placing bounty.

Update 9 Tried Wayland too; in fact that's what the live media defaulted to. GNOME does not use Weston, so weston.ini won't work when it comes to forcing use of i915 and ignoring amdgpu.

Original description starts below.

Alright, so I just built a mining rig that has Ubuntu 18.04.1 on it (tried pre-release 18.10 but for some reason AMDGPU fails to build DKMS modules in that case even with known workarounds like version spoofing applied, so had to just downgrade). The card is working fine; mining ETH at between 24.2 and 24.3 MH/s even with just one Sapphire Nitro Radeon RX 480 (which has a much better fan than the stock card and can thus sustain a high hashrate when fan speed is cranked all the way up).

The system also has an Intel Core i5-8400 CPU on it — which not only has six cores but also has on-chip graphics — running on the MSI H310-F Pro motherboard. Before I got the AMDGPU drivers configured to run that card, GNOME Shell was running perfectly fine. After I got the discrete GPU configured for mining, however, suddenly there’s nothing but VTs — no GNOME, no GDM, no X, no nothing. Is there a way, therefore, to force X to use the Intel integrated graphics chip on the i5-8400 in order to be able to both use the desktop and mine at the same time? Any help would be greatly appreciated.

Is there a way to limit or control the power consumption for AMD graphics cards (i.e. Radeon RX580) using the AMDGPU-PRO Driver on linux?

(AMDGPU-PRO Driver for Linux Version 17.40, Ubuntu 16.04.04, Kernel 4.10.17)

I have 10 GPU attached to one system and want to mine with all, as ubuntu GUI not allow to run 10 GPU at a time, So will go with the command line and able to mine there.

Now I want to run my miner on system startup for particular this I am following this tutorial (step-7). I have done all the things as per tutorial but not able to start ./start_only_eth.bash command(no screen session created) in screen session.

If I am executing below command, I am able to find this session using "screen -ls" command.

screen -dmS ethm

Below is my script (demo.sh)

// update

#!/bin/bash
DEFAULT_DELAY=0
if [ "x$1" = "x" -o "x$1" = "xnone" ]; then
   DELAY=$DEFAULT_DELAY
else
   DELAY=$1
fi
sleep $DELAY
su aman -c "screen -dmS ethm /home/aman/Desktop/claymore/start_only_eth.bash"

I have added this script's path in rc.local file as mentioned in this tutorial (step-7).

below is my rc.local

#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution 
# bits.
#
# By default this script does nothing.

 sh '/home/aman/Desktop/demo.sh'
  exit 0

After restart if I execute "screen -ls" command I got below message

No Sockets found in /var/run/screen/S-aman.

Note: I think problem is not in rc.local, problem is in demo.sh. If try to execute demo.sh manually the script will fail and got above message.

// // -------------------------- With TMUX -------------------- // //

I have also tried this with tmux, this time I am able to run miner(manually) in tmux session but again fail to run script using rc.local for this below is my demo.sh

#!/bin/bash
tmux new-session -d -n MINER
tmux send-keys -t MINER "cd /home/aman/Desktop/claymore" C-m
tmux send-keys -t MINER "./start_only_eth.bash" C-m

Below is what I am getting(console) when try to test rc.local

aman@aman-System-Product-Name:~$ sudo /etc/init.d/rc.local start
[sudo] password for aman: 
[ ok ] Starting rc.local (via systemctl): rc.local.service.