samgooi4189

Sympthoms:
$ rails c
Running via Spring preloader in process 19704
Loading development environment (Rails 5.1.0)
2.4.0 :001 > User.connection
Mysql2::Error: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2)
	from (irb):1


Fix:

samgooi4189

# reset to HEAD
git reset HEAD --hard

# will remove unstaged files without removing gitignore file
git clean -fd

samgooi4189

#!/bin/bash
###
# This is a simple script to play video across ssh with VLC
###

if [[ -z $3 ]]; then
echo "Usage: play_remote_video.sh [username] [remote_address] [video_full_path]"
exit 1
fi

samgooi4189

#!/bin/bash

sudo modprobe -rv forcedeth
sudo modprobe -v forcedeth msi=0 msix=0
sudo ethtool -s eth0 speed 100 duplex full autoneg off

samgooi4189

#!/bin/bash

gsettings set org.gnome.desktop.wm.preferences button-layout ":minimize,maximize,close"

samgooi4189

Under lspci -vv, I saw my wifi card bcm43228 is using wl module, but it is working weirdly, so I go inspect dmesg and found:
[   17.135645] wl: module license 'MIXED/Proprietary' taints kernel.
[   17.135648] Disabling lock debugging due to kernel taint
[   17.137273] wl: module verification failed: signature and/or required key missing - tainting kernel
[   17.227089] wlan0: Broadcom BCM4359 802.11 Hybrid Wireless Controller 6.30.223.248 (r487574)
[   17.315644] wl 0000:03:00.0 wlp3s0: renamed from wlan0

linux is loading the wrong device for my wifi card.
so I search online and found https://ubuntuforums.org/archive/index.php/t-2209676.html
In short,

samgooi4189

I am having issue with Network Manager in linux when I enable and disable my wifi through hardware switch.
All the accees points are not showing up in Network Manager, but I still connected to internet.

So here is what I do to get all access point listing issue fixed:
1. open /etc/NetworkManager/NetworkManager.conf and edit this:
     managed=true
2. open /etc/network/interfaces and add this:
     # This is a list of hotpluggable network interfaces.
     # They will be activated automatically by the hotplug subsystem.
     auto wlp3s0

samgooi4189

#!/bin/bash

# Usage:
# ./createBootableUSB.sh /path/to/distro.iso /dev/sdX

sudo apt-get update
sudo apt-get install syslinux syslinux-utils --y
sudo umount $2
isohybrid $1 --entry 4 --type 0x1c
sudo dd bs=8M if=$1 of=$2

samgooi4189

Follow the WORKAROUND:
  1. Add a comand to /etc/rc.local, add the following line above "exit 0": 
        setpci -s 00:1c.2 0x50.B=0x41
  2. Add the same comand to /etc/apm/resume.d/21aspm (which does not exist yet):
        setpci -s 00:1c.2 0x50.B=0x41
  3. Add the following to /etc/modprobe.d/sdhci.conf:
          options sdhci debug_quirks2=4
  4. Re-generate initrd:
         sudo update-initramfs -u -k all
  5. Reboot or reload sdhci module:

samgooi4189

# set regional to BO (Bolivia) since they allow use of 1000 mW tx-power
set-bo:
        sudo ifconfig wlan0 down
        sudo iw reg set BO
        sudo ifconfig wlan0 up
        iwconfig wlan0

# Side effects:
# overheating of the power amplifier chip and the card which will cause lower efficiency and more data errors;
# overdriving the amplifier which will cause more data errors;