Flashing MMU3 firmware from Ubuntu 22.04.4 failures - Hardware, firmware and software help

RE: Flashing MMU3 firmware from Ubuntu 22.04.4 failures

annswims — Sun, 17 Nov 2024 22:46:17 +0000

I had the same issue and I hate to break it to you how easy the fix was. I'd just the firmware on my MK3S+ (main machine, not the MMU) and that disabled my MMU. Once I went to Settings -> MMU on my printer's LDC screen I could find and connect to the MMU with my computer.

RE: Flashing MMU3 firmware from Ubuntu 22.04.4 failures

JediRick — Fri, 27 Sep 2024 15:45:50 +0000

I experienced this issue as well when I first installed the MMU3 on my MK4. Resolved then by using a Windows machine.

Tried again today to upgrade the firmware to match the new MK4S, issue is still there.

Not sure if this is something Prusa can do anything about, when I checked dmesg output this is what I see when I connect my Pop!_OS machine (Ubunut derivative). Looks to be an incompatibilty, but not sure if it is the USB driver or in the MMU3 USB interface.

 usb 2-1.5.1.1: new full-speed USB device number 33 using ehci-pci
 usb 2-1.5.1.1: New USB device found, idVendor=2c99, idProduct=0004, bcdDevice= 0.01
 usb 2-1.5.1.1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
 usb 2-1.5.1.1: Product: Original Prusa MMU unit 🐑
 usb 2-1.5.1.1: Manufacturer: prusa3d.com
 BPF: 	 type_id=3987 bits_offset=32
 BPF:  
 BPF: Invalid name
 BPF: 
 failed to validate module  BTF: -22

RE: Flashing MMU3 firmware from Ubuntu 22.04.4 failures

Ron — Fri, 12 Jul 2024 21:00:09 +0000

I have the same on MAC OS Sonoma 14.5

No way to reset the MMU3 nor to flash it.

Used 5 different cables that all work for data transfer on other apps

RE:

Robvene — Wed, 20 Mar 2024 14:18:34 +0000

Hello.

Today I had the same problem when trying to update to the latest firmware. And in the device tab my MMU3 doesn't detect me. I've changed three wires but I still can't detect the MMU unit.

What else can you be??

Gracias

RE: Flashing MMU3 firmware from Ubuntu 22.04.4 failures

DrTomFlint — Tue, 12 Mar 2024 16:33:12 +0000

Only thing I have not changed was the USB cable.

Re-tested that this morning and see that it is broken. I assumed it was ok since it was in use on another development board and worked fine there. Maybe damaged it removing it from the rack?

Bought a fresh new one this morning and the MMU shows up and can be flashed just fine.

When in doubt, check your cables!

RE: Flashing MMU3 firmware from Ubuntu 22.04.4 failures

Hello — Tue, 12 Mar 2024 08:14:51 +0000

As soon as you click tbe rest button press flash, you have to click flash w8thin 5 seconds of the mmu turning on or resetting

RE: Flashing MMU3 firmware from Ubuntu 22.04.4 failures

DrTomFlint — Tue, 12 Mar 2024 03:38:50 +0000

Trashed one of my perfectly good Linux laptops to install windows 8.1.

First was missing api-ms-win-crt-l1-1-0.dll and had to do a bunch of updates, took more than 2 hours.

Eventually got a working Windows 8.1 installation that could run the Prusa Slicer V 2.7.1.

Try to do the firmware update on the MMU and got the same exact failure.

I used to Love prusa. Starting to revise that opinion. Three entire days wasted on this effort. I am not a happy camper.

RE: Flashing MMU3 firmware from Ubuntu 22.04.4 failures

DrTomFlint — Mon, 11 Mar 2024 23:39:51 +0000

Further tests: Built a Debian 12 laptop and got the same exact results.

RE: Flashing MMU3 firmware from Ubuntu 22.04.4 failures

DrTomFlint — Mon, 11 Mar 2024 18:33:15 +0000

That does seem to be the common fix. I don't have a Windows license. So unless I convince a friend to stop by or lend me a machine...

RE: Flashing MMU3 firmware from Ubuntu 22.04.4 failures

JoanTabb — Mon, 11 Mar 2024 18:27:14 +0000

Do you have access to a windows device, to try flashing with?

regards Joan