Problem in creating a dual-boot system

[claydoh]

As I noted , you do need the plugin, I believe, based on that link I posted.

Run the command hp-plugin as it mentions, to open the GUI tool to install it.
You might also consider installing the whole HPLIP-GUI suite, which I think runs this, or can run this when its setup wizard is configuring things.

This is just a suggestion for an available option, iirc you would have to install the plugin on a new 16.04 install as well fore the scanner to work.

Another option, as I mentioned, is to install 16.04 into a virtual machine with Virtualbox, which runs 16.04 from your running 22.04 OS. It is easier for some, since you don't need to reboot, but is a bit of extra work and configuration up front, passing the printer, and sharing directories between the OS and the VM.

As to the dual boot, we need more information to be able to determine what you problem with that is.
What do you see, or what happens when booting the 16.04 installer? Which tool did you use to create the USB stick?

[wtb32141]

The scanner worked perfectly under Ubuntu 16.04. Under Ubuntu 22.04, the scanner says, “Failed to scan. Cannot connect to scanner.” The printer-scanner is plugged into the wall socket, and the printer/scanner is plugged into a USB port on my laptop. The only reason I can think of for the “cannot connect to scanner” message is a missing driver; that’s why I’m trying to install Ubuntu 16.04 from the bootable flash drive.

The sane command gave this result: “found possible USB scanner (vendor=0x03f0 [Hewlett-Packard], product=0x3b2a [HP Color LaserJet MFP M277dw]) at libusb:001:006

# Your USB scanner was (probably) detected. It may or may not be supported by

# SANE. Try scanimage -L and read the backend's manpage.”

It detected my printer/copier/scanner, for “HP Color LaserJet MFP M277dw” is my printer/scanner. I know nil about “scanimage -L” and “the backend’s manpage”.

[claydoh]

personally, I might suggest using a virtual machine (Virtualbox, etc) for this purpose, and passing the printer to 16.04 that way. No rebooting to print



I think that if the scanner worked in 16.04, there it should work in 22.04, SANE (the scanner backend fin Linux) wouldn't have dropped support for a working device, though one might need to install or edit something, depending on the specific scanner chipset.

sudo sane-find-scanner

if it is plugged in via USB. This will tell us the specific hardware it finds.

But actually, you probably need the hp-plugin, which can be installed using a gui tool, when running the command

hp-plugin

Your scanner requires this proprietary plugin for scanning.

This iirc is supposed to be installed when the HPLIP setup wizard is run, which you'd have to do in 16.04 as well.

[claydoh]

and I was expecting it to ask me,

So.....what do you actually see

[wtb32141]

Ubuntu 22.04 now is the only OS installed on my laptop. I want a dual-boot system with Ubuntu 16.04 installed alongside of 22.04. [If you’re wondering why, it’s because Ubuntu 16.04 should have the drivers I need to run my printer’s scanner.] I have created a bootable flash drive with Ubuntu 16.04 on it. I went into the BIOS and changed the boot sequence so that it first will look to the flash drive when it boots. I booted into 16.04, and I was expecting it to ask me, “Do you want to install Ubuntu 16.04?” I would have answered, “Yes.” Then I would expect it to ask me if I want to install it alongside Ubuntu 22.04. I would answer “Yes.” At that point, the installer presumably should begin. I was NOT asked if I wanted to install Ubuntu 16.04; so my question is: What’s the secret to getting the computer to ask me if I want to install Ubuntu 16.04?