# CoreConnect i.mx53 NVRAM Problem (error: unknown display selected)

**URL:** <https://forums.digi.com/t/coreconnect-i-mx53-nvram-problem-error-unknown-display-selected/11391>\
**Category:** Windows CE\
**Tags:** connectcorewi-imx53\
**Created:** [January 24, 2013, 1:03pm UTC](https://forums.digi.com/t/coreconnect-i-mx53-nvram-problem-error-unknown-display-selected/11391 "2013-01-24T13:03:40Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![rahul.sng24\_at\_gmail](https://avatars.discourse-cdn.com/v4/letter/r/839c29/32.png) [@rahul.sng24\_at\_gmail](https://forums.digi.com/u/rahul.sng24_at_gmail)\
**Post date:** [January 24, 2013, 1:03pm UTC](https://forums.digi.com/t/coreconnect-i-mx53-nvram-problem-error-unknown-display-selected/11391/1 "2013-01-24T13:03:40Z")

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Hi ,

After booting the kit uboot starts and displays error given below

U-Boot 2009.08 - dub-1.2.2 - (Jan 23 2013 - 17:09:26) - GCC 4.4.6  
for ConnectCore Wi-i.MX53 on a JumpStart Kit Development Board

I2C: ready  
NAND: 512 MiB  
MMC: FSL\_ESDHC: 0, FSL\_ESDHC: 1  
DRAM: 512 MB  
error: unknown display selected

Please Help [X-(] [X-(] [X-(] [X-(] [X-(] [(:|]

Thanks in Advance.

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<div class="post-metadata">

**Author:** ![thomas.kuhlmann](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/thomas.kuhlmann/32/7_2.png) [@thomas.kuhlmann](https://forums.digi.com/u/thomas.kuhlmann)\
**Post date:** [May 2, 2013, 6:45am UTC](https://forums.digi.com/t/coreconnect-i-mx53-nvram-problem-error-unknown-display-selected/11391/2 "2013-05-02T06:45:56Z")

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Do you still get an U-Boot prompt after this error?  
Try U-Boot “envreset” command.  
This U-Boot was compiled by yourself? Maybe some misconfiguration?  
Try to update to U-Boot binary 1.5.2.1 frmo March 2013

[https://na14.salesforce.com/sfc/p/d0000000eJxP/a/d00000000QaV/76JY3vjZmec\_AWRMcT4vYH.1ivJrcBhykYVhPf6XPbY=](https://na14.salesforce.com/sfc/p/d0000000eJxP/a/d00000000QaV/76JY3vjZmec_AWRMcT4vYH.1ivJrcBhykYVhPf6XPbY=)