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
-=-=-=-=-=-=-=-

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.