Solved! An actual working “fix” for slow wifi in Ubuntu 16.04 for Lenovo Thinkpad X1 Carbon (6th Generation) with Intel 8265 module

Scenario before fix

Wifi works without major issue in Windows 10 i.e. no problem with the wifi module nor wifi antenna

The fix

Add one line containing following to /etc/modprobe.d/iwlwifi.conf

options iwlwifi 11n_disable=1

Following is a sample bash script incorporating the fix;

#!/bin/bash
echo “options iwlwifi 11n_disable=1” | sudo tee /etc/modprobe.d/iwlwifi.conf
sudo modprobe -rfv iwlmvm
sudo modprobe -rfv iwlwifi
sudo modprobe -v iwlwifi

Credits to https://www.youtube.com/watch?v=ls3sE64Ril8

Note this fix should work on any variant of Linux which evaluates /etc/modprobe.d/iwlwifi.conf on start up. It should also work for any Intel chipset using iwlwifi (i.e. not limited to 8265 as per credited link)

How to reset Haylou GT1 TWS Bluetooth earbuds

Best to listen to the tones instead of looking at the LEDs (which are inconsistent)

1. Touch & hold until you hear the power down sound (tiiing tiing ting tung) – release touch (both buds)

2. Touch & hold both buds until you hear the SECOND taaang taang tang tung sequence – release touch (both buds)

3. Touch & hold both buds until you hear the startup sound (tung ting tiing tiiing) – release touch (both buds) and bring both buds close to each other. They will auto pair.

4. Search for and connect device to the right bud – DONE!

Cloning/imaging drives/disks to file then restoring using cat command (Mac OS X example – should work in Linux as well)

Warning: Command line utilities tend to be simple but very powerful i.e. typing incorrect commands (especially the directions of < and > below) can result in your source drive being wiped out – suggest to back up important files before proceeding. Proceed with instructions below at your own risk.

Do following in an OS X terminal

1) Determine source/destination drives/disks;

mount


2) Unmount partition

diskutil unmount /Volume/XXXXXXX


3) Clone/image partition to file (assumes /dev/disk1 is source). Note: this can take some time depending on read/write speeds of drives;

sudo su -i
cat /dev/disk1|gzip -c9 > ./filename.cat.gz


4) Restore image to partition (assumes /dev/disk1 is destination and drive is unmounted). Note: this can take some time depending on write speeds of drives;

sudo su -i
gzcat ./filename.cat.gz > /dev/disk1


Above was tested using in OS X 10.12. You may get “unexpected end of file” / “uncompress failed” errors but nevertheless the commands work.

Cloning/imaging drives/disks using linux pv command (Ubuntu example)

Warning: Linux utilities tend to be simple but very powerful i.e. typing incorrect commands (especially the directions of < and > below) can result in your source drive being wiped out – suggest to back up important files before proceeding. Proceed with instructions below at your own risk.

1) Install pv;


sudo apt-get install pv


2) Determine source/destination drives/disks;


sudo parted


Enter print all in the parted command line then look for /dev/sda, /dev/sdb etc. and associated partition descriptions to determine source/destination drives/disks.

3) Start the actual cloning/imaging (assumes /dev/sda is source and /dev/sdc is destination);


sudo su
pv < /dev/sda > /dev/sdc


4) Install new drive then use linux gparted utility to extend partition sizes.

Above was tested using an Ubuntu 14.04 LiveUSB with an internal source drive containing a Windows 10 and an Ubuntu 14.04 partition. Windows did report a strange error during initial boot after new drive was installed but sorted itself after restarting. No issues found booting into the Ubuntu partition.

SED examples

sed -i '/^#/d' vendor/broadcom/hammerhead/device-partial.mk #remove all lines beginning with #

sed -i '1,2d' vendor/broadcom/hammerhead/device-partial.mk #delete 1st 2 lines

sed -i 's_:broadcom \\_ _g' vendor/broadcom/hammerhead/device-partial.mk #replace :broadcom \ with a space

sed -i 's_:system_ system_g' vendor/broadcom/hammerhead/device-partial.mk #replace :system with system

sed -i 's_ vendor/_install -D -m 644 vendor/_g' vendor/broadcom/hammerhead/device-partial.mk #replace vendor/ with install -D -m 644 vendor/

sed '1 i\#!/bin/bash' vendor/broadcom/hammerhead/device-partial.mk #add #!/bin/bash to 1st line

Compressing / splitting files in Android (also works in Linux) using built in tools

Android phones may already have a terminal emulator app installed by default (otherwise install a terminal emulator app from the Google Play store) then do the following;

tar czvf - inputfilename |split -b 5M - outputfilename.tar.gz.

Resulting filenames will be outputfilename.tar.gz.aa, outputfilename.tar.gz.ab, outputfilename.tar.gz.ac etc.

inputfilename can be a file or folder, 5M in above example splits files into 5MB sizes.

To extract/recombine;

cat outputfilename* |tar xzvf -

Credits to StackExchange

Linux curl command usage example

Enter the following into any Terminal window to begin/continue downloading a file from most webservers.

curl -C - -O http://filename

Credits to TheGeekStuff

Android “App not installed” error

Try the following if you just flashed a brand new custom ROM and experienced subject error when trying to install a side loaded .apk.

Credits to Jani-

How to check which toolchain was used to compile your Android ROM (up to Android 7)

Enter the following into any Terminal Emulator app from the Google Play Store.

strings /system/lib/libeffects.so|grep -i gcc

Credits to BelzIgoh

Android Lollipop/Marshmallow compile/build packages for Ubuntu 14.04 LTS Trusty Tahr (64bit)

sudo apt-get install openjdk-7-jdk git gnupg ccache lzop libglapi-mesa-lts-utopic libgl1-mesa-dri-lts-utopic flex bison gperf build-essential zip curl zlib1g-dev libc6-dev lib32bz2-1.0 lib32ncurses5-dev x11proto-core-dev libx11-dev libreadline6-dev lib32z1-dev libgl1-mesa-glx-lts-utopic libgl1-mesa-dev-lts-utopic g++-multilib mingw32 tofrodos python-markdown libxml2-utils xsltproc libreadline6-dev lib32readline-gplv2-dev libncurses5-dev bzip2 libbz2-dev libbz2-1.0 libghc-bzlib-dev lib32bz2-dev squashfs-tools pngcrush schedtool dpkg-dev python-networkx zip

As of 9 March 2016, CM13 seems to also require installation of maven.

Dirty Unicorns ROM also requires liblz4-tool in addition to above.