Slowed Hashrate After Xubuntu Update

[dre2ooo]

I just updated my xubuntu rig via "sudo apt upgrade" and several updates were installed.  After doing so, my rig (5 x RX 570's) is running just over 17MH/s per card.  It was running at 22Mh/s per card before the upgrades. 

I have the latest 17.40 mining drivers installed as well as openCL.  Again, it was running fine at 22Mh/s/card before upgrading Xubuntu.  Is anyone else experiencing this?  Is there a known issue of which I am unaware?  Thanks!

[ultiman2]

check this site

http://www.cryptobadger.com/2017/05/build-ethereum-mining-rig-faq/#kernal_update

you will find how to uninstall it and also how to block futur update

[dre2ooo]

Yes!  Thank you that is exactly what did the trick. 

I will post the commands here to help those experiencing the same problem in the future:

sudo apt-get remove linux-image-4.13.0-26-generic && sudo apt autoremove -y

sudo update-grub

Reboot

and also

edit its configuration at /etc/apt/apt.conf.d/50unattended-upgrades.

You can selectively disable individual APT sources to auto-update, by commenting out corresponding sources in "Unattended-Upgrade::Allowed-Origins":

Unattended-Upgrade::Allowed-Origins {
        "${distro_id}:${distro_codename}-security";
//      "${distro_id}:${distro_codename}-updates";
//      "${distro_id}:${distro_codename}-proposed";
//      "${distro_id}:${distro_codename}-backports";
};