Ubuntu 20.04 daily build April 1st 2020 on Dell Precision T5600 tower

Switched to a different computer; Dell Precision T5600
Ubuntu 20.04 daily build April 1, 2020


installed Ubuntu 20.04 daily build (dated 4-1-2020) noticed some changes/additions to look and feel from previous versions.

When booting up from the flash drive, it went to a black screen/white text and some kind of disk check display %xy completed;

Then after install and reboot, it goes to the black screen with white text - remove the install media and press enter; this is different, as well as some changes to the theme/desktop colors;

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Initial things I noticed:
Also, the printer auto-discovery is engaged and flashing different printers it finds; see below.

Software Updater prompts to install updates; installed these updates, not many just some docs.

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1) Configure ssh to allow ssh logins from remote hosts to this host; when trying from remote to this host, get error msg: ssh: connect to host <somehostname> port 22: Connection refused
2) From past experience, just need to install this package "openssh-server" package; this will allow ssh connections.
$ sudo apt-get install openssh-server
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Printer auto-discovery situation; it annoys me that every time I boot up/login I see the several pop-up messages stating that this or that network printer has been added. It would be so nice if this could be configured away. (As of this writing, I haven't figured out how to stop these network printers discovered)

I found a google search procedure for this and tried it on an earlier daily-build; it seemed to work to stop the pop-up messages, but on this computer/OS build, it happens every time I arrive at the login screen.  Sigh!!

But I still copy the "system-config-printer.desktop" icon from /usr/share/applications folder to my desktop (right-click the icon, copy to the desktop, then right-click the icon on the desktop, and select "allow launching" and now I can start the printer app I'm used to seeing and using. For now, I'm just ignoring the pop-up messages.=-=-=-=-=-=-=-=-=-=



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install youtube-dl;
I have used youtube-dl for several years now and it works for me when I need to have a local copy of a youtube video. Here's the process I follow.

$ sudo apt install curl
$ sudo curl -L https://yt-dl.org/downloads/latest/youtube-dl -o /usr/local/bin/youtube-dl
$ sudo chmod a+rx /usr/local/bin/youtube-dl
$ sudo ln -s /usr/bin/python3 /usr/local/bin/python

Now you can open youtube.com in browser and search for the video of your choice; when you open the page of the video to download,  in this example, the video URL is: https://www.youtube.com/watch?v=U3XPzwjhSZw
 (one of my favorites-"Oye Como Va")

open terminal and cd to the folder of your choice; enter this command to see which available video is the 'best':
$ youtube-dl -F https://www.youtube.com/watch?v=U3XPzwjhSZw


(the output shows that #18 is the 'best version' to download)
<snip>
18           mp4        360x360    360p  290k , avc1.42001E, mp4a.40.2@ 96k (44100Hz), 8.90MiB (best)

Modify the cmdline to include the number of the 'best' video:

$ youtube-dl -f 18 https://www.youtube.com/watch?v=U3XPzwjhSZw
[youtube] U3XPzwjhSZw: Downloading webpage
[download] Destination: Oye Como Va-U3XPzwjhSZw.mp4
[download] 100% of 8.90MiB in 00:00

NOTE: don't forget the difference of the -F (capital F) vs the 2nd cmdline -f (lower case f).

Then open this mp4 video in the default Videos or VLC (which I always d/l and use.
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install vlc (not included in default ubuntu 20.04 install); open ubuntu software, (takes a while as it says it is downloading the catalog), then search for vlc and install. This is my favorite media player.
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Ripping CD's to mp3/oog/flac files
The default media player on Ubuntu 20.04 appears to be Rhythmbox.
Insert CD into player (I know; old school; but I have a lot of CDs and I'm kinda retro myself, ie old!))

Open RB; see the CD title under the "Devices" category; you should see all of the songs and titles; NOTE: I notice that sometimes the CD title lookup does not find the info for the CD; so I sometimes create a win10 VM using virtualbox and use the default windows media player, which has always worked.

If the menu bar is not visible, click on the triple dot ... pattern and it should appear. Extract; you change the ripped format in the preferences area, flac, oog, mp3, mp4 audio.
I noticed that if I selected the mp4 audio format, that when I clicked "Extract" the rb player would crash, exit and prompt to report the crash; flac is working though and oog; but seems slow to me. Windows media player is faster in a win10 VM under virtualbox.
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Ubuntu 20.04 daily build experience on dell precision T5810 tower;

20200316:  download latest daily build ubuntu 20.04;
google: ubuntu 20.04 daily build download
URL: http://cdimage.ubuntu.com/daily-live/pending/
date of files is 2020-03-16 08:00; click "64-bit PC (AMD64) desktop image);
using google chrome it starts downloading immediately to my downloads folder: /home/<me>/Downloads/focal-desktop-amd64.iso (2.6gb)
took about 5-7 minutes to download;
long experience has shown me that rufus works "EVERY" time; never had a failure; so I copy this ISO to a windows host and open utility RUFUS to copy to usb flash drive;
using host computer dell precision t5810 tower; turn off secure boot in bios; reboot and F12 to select to boot from this usb drive;
prompt to install ubuntu; boots up into ubuntu gnome desktop;
normal install wizard; I select "Normal Installation" "Download updates while installing Ubuntu" & "Install third-party software for graphics and Wi-Fi hardware and additional media formats";
Just for kicks, select the "EXPERIMENTAL: Erase disk and use ZFS"; not that I really know much about ZFS or how to use its features;

after install completes, reboot;
get normal login prompt; enter pw; ok; but now I get a black screen; rebooted to fix but same thing; after login, get black screen; so pushed the power button and it came up to the normal locked desktop screen; enter in pw again for this user efudd and it now shows the desktop; not sure what this is.

Now to start installing/configuring per my needs/desires;
1) install all updates;
2) configure screen saver to wait 60 minutes before locking;
3)

So noticed the icon in the left-side icon bar and removed the usb flash drive; the icon did not go away and won't eject and go away; so rebooted; now back to square one; after pw and enter, screen goes to black; haven't found a way to get around this;

press ctrl + alt + F5 to get terminal; login ok;
# lshw | less
and scroll down to see the Nvidia card model info;
GM107GL Quadro K620

or use this better form of the lshw cmd;
# lshw -C display
this gave me the model number;

tried installing a prior version of nvidia driver (430; vs the 440 installed)
this did not work;

-=-=-=-=-=-=-=- then used cmds from this site to remove nvidia drivers;
How to uninstall the NVIDIA drivers on Ubuntu 20.04 Focal Fossa Linux
Lubos Rendek
https://linuxconfig.org/how-to-uninstall-the-nvidia-drivers-on-ubuntu-20-04-focal-fossa-linux
The following commands will remove the proprietary Nvidia driver:
$ sudo dpkg -P $(dpkg -l | grep nvidia-driver | awk '{print $2}')
$ sudo apt autoremove
Then, switch back to nouveau driver:
$ sudo apt install xserver-xorg-video-nouveau
when I ran this nouveau install cmd, msg was it was already installed and latest version.
Reboot your system;
login ok to desktop; yea;
Once your system has rebooted confirm loaded nouveau modules:
$ lsmod | grep nouveau
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Testing out Ubuntu 20.04 LTS daily build (4 March 2020) Lenovo X1 Carbon 2 gen

I downloaded the latest daily build of Ubuntu 20.04 last week and installed it on a lenovo x1 carbon laptop (4-5 years old). From this URL:
http://cdimage.ubuntu.com/daily-live/pending/
I d/l the March 4, 2020 version; today's version is March 9th;

It seemed to install ok; just a normal install; didn't see any issues with the install.

One thing was about the printer auto-discovery that seems to happen each time I login/boot up and login. This is less than useful (at least I haven't figured out how to select the printer I need to print to and get it actually working).

However, I did a google search and looked at the two most prevalent solutions. After trying one of them, ubuntu 18.04 – disable network printer auto discovery
https://cirovladimir.wordpress.com/2019/02/11/ubuntu-18-04-disable-network-printer-auto-discovery/

FIRST:
edit /etc/cups/cups-browsed.conf and add/modify:
BrowseProtocols none
THEN:
$ sudo service cups-browsed restart
$ sudo service cups restart

NOTE: this did not prevent printer auto-discovery from happening on login; but I figured out to just put the "system-config-printer.desktop" icon on my desktop and open up the normal (normal for me thru past experience) printer window. Found in the /usr/share/applications folder; right-click the icon, copy to the desktop, then right-click the icon on the desktop, and select "allow launching" and now I can start the printer app I'm used to seeing and using productively. Just ignore the "Settings/Printers" section;

After following these steps I don't get the pop-up messages saying found this and that printer when logging in; however, in settings/printers, even if I delete all the printers displayed in this app, they will come back so I don't need to delete them; just ignore this setting.