# Keep failing long prints because im losing connection to MCU

**URL:** <https://klipper.discourse.group/t/keep-failing-long-prints-because-im-losing-connection-to-mcu/25631>\
**Category:** General Discussion\
**Created:** [February 13, 2026, 8:14pm UTC](https://klipper.discourse.group/t/keep-failing-long-prints-because-im-losing-connection-to-mcu/25631 "2026-02-13T20:14:26Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![C3DRIC](https://avatars.discourse-cdn.com/v4/letter/c/5daacb/32.png) [@C3DRIC](https://klipper.discourse.group/u/C3DRIC)\
**Post date:** [February 13, 2026, 8:14pm UTC](https://klipper.discourse.group/t/keep-failing-long-prints-because-im-losing-connection-to-mcu/25631/1 "2026-02-13T20:14:26Z")

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### Basic Information:

Printer Model:ender 3v2  
 MCU / Printerboard: mks genl v2.1  
 Host / SBC linux mint  
 klippy.log:

[klippy.zip](https://klipper.discourse.group/uploads/short-url/5FIijpM7stqSvnBiJjWNEFDK30j.zip) (1.6 MB)

As the title says, i can print some stuff, but sometimes my print will halt and tell me they lost signal to the MCU and i have no idea how to fix it, nor how to know what triggers it…

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**Author:** ![EddyMI3D](https://yyz2.discourse-cdn.com/free1/user_avatar/klipper.discourse.group/eddymi3d/32/1981_2.png) [@EddyMI3D](https://klipper.discourse.group/u/EddyMI3D)\
**Post date:** [February 13, 2026, 8:26pm UTC](https://klipper.discourse.group/t/keep-failing-long-prints-because-im-losing-connection-to-mcu/25631/2 "2026-02-13T20:26:10Z")

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You may have a look here: [Got EOF when reading from device](https://klipper.discourse.group/t/got-eof-when-reading-from-device/6638)

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**Author:** ![cardoc](https://avatars.discourse-cdn.com/v4/letter/c/ec9cab/32.png) [@cardoc](https://klipper.discourse.group/u/cardoc)\
**Post date:** [February 13, 2026, 10:28pm UTC](https://klipper.discourse.group/t/keep-failing-long-prints-because-im-losing-connection-to-mcu/25631/3 "2026-02-13T22:28:13Z")

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> [@C3DRIC](#):
>
> Host / SBC linux mint

Are you using this computer for other tasks while printing?

```auto
CPU: 4 core Intel(R) Core(TM) i5-3350P CPU @ 3.10GHz

```

LOTS of cpu for klipper as long as you are not multitasking while printing.

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**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/klipper/original/1X/64419bf2aac6639e6ef5cef200dcd456b0a01ac3.png) [@system](https://klipper.discourse.group/u/system)\
**Post date:** [April 14, 2026, 10:28pm UTC](https://klipper.discourse.group/t/keep-failing-long-prints-because-im-losing-connection-to-mcu/25631/4 "2026-04-14T22:28:53Z")

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