linuxTroubleResolver

A few answers to resolve troubles I got with Xubuntu on my Acer Aspire VN7-592G-574M

1. HDMI not recognized
2. powerline font for agnoster theme from OhMyZsh
3. Sound mic trouble with Xubuntu

Arduino IDE

install arduino IDE via SNAP (not apt) and if problem with ttyUSB0, check this https://askubuntu.com/questions/1403705/dev-ttyusb0-not-present-in-ubuntu-22-04 (accepted answer)

HDMI port doesn't work.

Problem

With Xubuntu 16.06 (LTS) the HDMI port doesn't work. if a screen is plugged in, it's not recognized by Xubuntu. Therefore I can't use dual screen.

It seems to be linked with the optimus technology. But Xubuntu 16.04 is supposed to natively deal with this architecture.

Quick solution

First attempt:

(hopefully it will be enough)

• Launch Xubuntu recovery mode (press escape during boot on acer logo screen)
• Select "advanced ubuntu options"
• Activate network
• Launch dpkg option which should restore XOrg. I don't remember if, when I did it, a second screen was plugged in HDMI port, but it shouldn't be a probem.
• Reboot computer and it should be fixed.

If it does'nt fix the problem, continue with the "complete solution"

Complete solution if first one didn't work.

• Install aptitude first if needed: sudo apt-get install aptitude
• Try to install xserver-xorg-video-nouveau with aptitude (cause apt-get install won't accept to install it) : aptitude install xserver-xorg-video-nouveau
  This will destroy the XOrg server. (The computer won't reboot with graphical mode)
• Follow first attempt section now.

There is probably a better way to destroy then repair XOrg but this one seems to work fine.

To test

Install NVidia proprietary drivers with this new config. Will be tried before formating the computer (in a few months).

Powerline font for agnoster theme from OhMyZsh

Problem

The agnoster OhMyZsh theme is not properly working

Solution tried and checked

sudo apt-get install powerline

Sound mic trouble with Xubuntu

Problem

Neither the built-in mic nor jack mic input is recognized

Solution tried but not really good

1. Add line options snd-hda-intel model=dell-headset-multi at the end of /etc/modprobe.d/alsa-base.conf file
   mic is recognized (at least jack mic). built in mic doesn't seems to work seems to be recognized. however the audio output becomes bad

Solution to try :

Check https://ubuntuforums.org/showthread.php?t=927270&p=7593640#post7593640 and try it maybe? but seems to be an old post.

Maybe mix this solution with the already tried (at least the alsa-base.conf)

TODO

les confs réseaux (dont VPN) se trouvent dans /etc/NetworkManager/system-connections ce qui permet de les modifier à la main en cas de soucis d'import VPN