How to Cancel a U-Boot Boot
With the U-boot universal boot loader utility, you can initialize and troubleshoot hardware devices connected to a computer running the Linux operating system. U-Boot also lets you download and run Linux software application code on your computer. During an automatic boot procedure, the U-Boot utility displays an on-screen countdown before it starts. Cancel a U-Boot automatic boot process during the countdown and before the boot process commences by changing the value of a boot command variable.
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Instructions
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1
Restart your computer. Wait for the U-Boot countdown to display on the screen.
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2
Press any key on your computer keyboard to halt the U-Boot on-screen countdown.
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3
Locate the “bootdelay” variable in the U-Boot boot command information displayed on the screen.
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4
Delete the existing variable and replace it with “-1” to disable the automated boot process.
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Tips & Warnings
If you want to continue with the boot, change the "bootdelay" variable to “0” to immediately start the U-boot process.
Take care when editing the “bootdelay” variable. Entering an incorrect value can prevent U-Boot from working correctly.
