I noticed that the Jetson TK1 hangs during boot (when/before mounting the SD disk) when CONFIG_ARM_TEGRA_DEVFREQ=y is set and when u-boot from R21.4 is used (2014.10-rc2). The hang does not occur when I disable tegra-devfreq or when I use tegra-devfreq in combination with u-boot 2016.03 (from DENX upstream, built by Debian). Steps to reproduce: ARCH=arm make multi_v7_defconfig Set CONFIG_ARM_TEGRA_DEVFREQ=y Boot from an external SD card and it will hang when/before mounting the SD card. -- Martin Michlmayr http://www.cyrius.com/ -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html