# Variscite DART-6UL: U-boot integration succeeds with Yocto Sumo, but fails with Thud

**URL:** https://hub.mender.io/t/variscite-dart-6ul-u-boot-integration-succeeds-with-yocto-sumo-but-fails-with-thud/2288
**Category:** General Discussions
**Tags:** yocto, thud
**Created:** [August 6, 2020, 12:52pm UTC](https://hub.mender.io/t/variscite-dart-6ul-u-boot-integration-succeeds-with-yocto-sumo-but-fails-with-thud/2288 "2020-08-06T12:52:31Z")
**Posts on this page:** 1
**Showing post:** 8

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### Author: ![miklosj](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@miklosj](https://hub.mender.io/u/miklosj)
#### Post date: [August 12, 2020, 7:43am UTC](https://hub.mender.io/t/variscite-dart-6ul-u-boot-integration-succeeds-with-yocto-sumo-but-fails-with-thud/2288/8 "2020-08-12T07:43:41Z")

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Thanks for the inputs, for the time being I will try the manual patching.

According to the [Board Integration page](https://hub.mender.io/t/variscite-dart-6ul/), Mender has been tested successfully with Thud. Does it mean that U-boot auto-patching is supposed to work with a certain U-boot version?

If so, could downgrading U-boot to a specific commit solve the issue? By looking at the meta-variscite-fslc layer’s repo, I can see that U-boot has been changed a lot of times, seemingly independently from the layer’s other developments.

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