lamperez

Asus Zenbook UX3402 speakers on Linux

Important

THIS IS NOW OBSOLETE WITH KERNEL VERSIONS ≥ 6.7.0

A recent announcement in the kernel mail list by Cirrus developers will solve the problem described here. Therefore, the proposed solutions will be soon obsolete. See this comment (thanks, @flukejones, for the tip).

I got the speakers working on my Asus Zenbook 14 OLED UX3402, the one with Intel CPU and the two CS35L41 audio amplifiers connected over SPI (not the UM3402YA, with AMD and I²C). The amplifiers are supported by the snd_hda_scodec_cs35l41 module in recent kernel versions, but they require some model-specific configuration paramaters, that should be provided by

lamperez

ACPI DSDT/SSDT patching

These instructions are meant for a system with EFI, systemd-boot and deb based packages. Adjust them to your needs.

Reference: https://www.kernel.org/doc/Documentation/acpi/initrd_table_override.txt

See also https://github.com/lbschenkel/acer-sf314_43-acpi-patch

venam

#! /bin/sh

# the metadata only contains the name of the default sink
default_sink_name=$(pw-metadata 0 'default.audio.sink' | grep 'value' | sed "s/.* value:'//;s/' type:.*$//;" | jq .name)
default_sink_id=$(pw-dump Node Device | jq '.[].info.props|select(."node.name" == '" $default_sink_name "') | ."object.id"')
current_volume=$(pw-cli enum-params "$default_sink_id" 'Props' | grep -A 2 'Spa:Pod:Object:Param:Props:channelVolumes' | awk '/Float / {gsub(/.*Float\s/," "); print $1^(1/3) }')
change="${1:-0.1}" # defaults to increment of 0.1
new_volume=$(echo "$current_volume $change" | awk '{printf "%f", $1 + $2}')
# we need to reconvert to cubic root
#new_volume_cube=$(echo "$new_volume" | awk '{ print $1^3 }')

GenevieveBuckley

from io import StringIO


def double():
    x = input("Enter an integer: ")
    return int(x) * 2


def adding():
    x = float(input('Enter the first number'))

bzub

If you can't get X11 or Wayland GUI Linux apps to start anymore on Chrome OS, try the following.

In the Terminal app, this will show the status of your systemd user services/units:

systemctl --user

If sommelier@0.service and sommelier-x@0.service show a failed status, the following worked for me:

sudo ln -s /opt/google/cros-containers/bin/sommelier.elf /usr/bin/

tokoiwesley

# Add Repository to your system (ondrej/php PPA)

sudo apt install apt-transport-https lsb-release ca-certificates
sudo wget -O /etc/apt/trusted.gpg.d/php.gpg https://packages.sury.org/php/apt.gpg
sudo sh -c 'echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" > /etc/apt/sources.list.d/php.list'
sudo apt update

# Install PHP 7.1
sudo apt install php7.1

joseluisq

Install PHP 7 Xdebug in Arch Linux

"Normally", these instructions should be also valid (in similar way) for other Linux distros.

1.- Install Xdebug using pacman:

sudo pacman -Sy xdebug

ebautistabar

Recovering deleted files in Ubuntu with ext4 filesystem

Recently, I deleted some files by mistake in a Ubuntu machine with an ext4 fs. These notes document the steps I took to get them back.

Important

• this procedure assumes that the partition that contained the deleted files is different from the root partition, as that was the scenario with which I had to deal (deleted files were in my home dir). The procedure needs that the partition that contained the files is unmounted, so if the deleted files were in the root partition, the process would be a bit different (e.g. storing the fs journal in a USB stick, using a live CD/USB to boot and issue the commands, etc.)
• if something is not clear, you need more information, etc. check the sources below

With that out the way, let's begin.

alekswn

#!/bin/sh

if [ -z $1 ]
then 
    echo "Usage: $0 { p | l | a }. p - portrait, l - landscape, a - auto"
elif [[ $1 == a* ]]
then 
    echo "Turning on automatic rotation"
    adb shell content insert --uri content://settings/system --bind name:s:accelerometer_rotation --bind value:i:1
else

ha7ilm

#Install dependencies
sudo apt-get install build-essential git libfftw3-dev cmake libusb-1.0-0-dev

#Fetch and build rtl-sdr, skip if already done (subdirectories will be created under the current directory).
git clone git://git.osmocom.org/rtl-sdr.git
cd rtl-sdr/
mkdir build
cd build
cmake ../ -DINSTALL_UDEV_RULES=ON
make