# 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:** 24

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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 19, 2020, 8:36am UTC](https://hub.mender.io/t/variscite-dart-6ul-u-boot-integration-succeeds-with-yocto-sumo-but-fails-with-thud/2288/24 "2020-08-19T08:36:41Z")

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I made a fresh start according to [DART-6UL’s board integration page](https://hub.mender.io/t/variscite-dart-6ul/483). I have set up an initial build environment for SD-card boot (`export MEDIA="sdcard"`). Then I applied dellgreen’s local.conf settings with the MENDER\_STORAGE\_TOTAL\_SIZE fit for my eMMC, and it worked! I can boot from eMMC and update the system from the Mender backend. I guess there must have been some residual files in my previous build environment that messed up my images.

Thank you very much for your help!

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