Summary
- Fix consistent layer shifts
- Fix stack overflow
- Fix toggling MMU rework in menu
- Improve network throughput
This is a stable release of firmware version 6.2.2 for the Original Prusa MK4, MK4S, MK3.9, MK3.9S, MK3.5, MK3.5S, MINI & XL, addressing issues identified in version 6.2.0 and 6.2.1. This update is recommended for all users.
Fix consistent layer shifts
We have fixed a regression introduced in 6.2.0-RC1 that was causing consistent layer shifts on some models. We would like to apologize to all users who experienced this and thank all the kind people who reported this issue and provided their models as test-cases for us when debugging this issue.
Please note that not every layer shift is caused by a firmware bug like this. However, if you experience a layer shift that is both consistent between prints (happen in exactly the same place by exactly the same amount) and fixed by downgrading to 6.1.3 firmware, we would like to hear from you.
Fix stack overflow
We fixed a stack overflow blue screen happening when the printer was trying to report that another error screen happened before.
Fix toggling MMU rework in menu
When toggling MMU in the menu the printer didn’t request a filament sensor calibration. This is now fixed.
Improve network throughput
We have backported two changes that aim to improve network performance. We are postponing sending thumbnails back to Prusa Connect, and we are employing a different allocator for TCP packets.
Full Changelog: v6.2.1...v6.2.2