XL BSOD On Cold start - Hardware, firmware and software help

RE:

ReeDoet3D — Wed, 08 Apr 2026 10:10:31 +0000

Exactly that; you expect a "turn on, walk away" from a 5K machine (or ~2K in case of a Core One L).

Bootloader is indeed 2.5.0

FW is 6.4.0

There is a new beta; 6.4.1, it mentions this, however it is unclear if this is a property of this beta, or rather that this beta addresses it, in any case; I'm not prepared to run beta firmware on my only machine, even though it's just a hobby.

Known issue - Power panic resulting in a BSOD

https://github.com/prusa3d/Prusa-Firmware-Buddy/releases/tag/v6.4.1-beta

RE:

Jürgen — Wed, 08 Apr 2026 09:43:37 +0000

Did the XL also get updated to boot loader version 2.5 together with the 6.4.0 firmware? That's when the error started to occur in the Core One. The most recent firmware 6.5.3 for the Core One brings a further update to boot loader 2.6. It "addresses" the problem by replacing the blue screen with a much nicer black screen for the error message. 🙄

While it's easy enough to recover via a reset, it has annoyed me in situations where I just turned on the printer in my workshop and headed right back upstairs -- only to be called back by the beeps from behind. I struggle to understand why Prusa could not get this fixed during the 6 months since the problem was first reported.

XL BSOD On Cold start

ReeDoet3D — Tue, 07 Apr 2026 18:21:22 +0000

If I had a nickel for every time this happened, I'd have two nickels, which isn't a lot, but it's weird it happened twice.

No special circumstances; just, powered on the machine, started yelling, hit reset, all works fine.

Wondering what I can do to make this stop.

7e6e456e-img_0653.jpeg