U-Boot 2015.04-rc4-00125-g662e2ac-dirty (Mar 30 2015 - 00:17:30) TEGRA124 Model: Acer Chromebook 13 CB5-311 DRAM: 2 GiB MMC: Tegra SD/MMC: 0, Tegra SD/MMC: 1, Tegra SD/MMC: 2 Card did not respond to voltage select! MMC init failed Using default environment In: serial Out: serial Err: serial Net: Net Initialization Skipped No ethernet found. Hit any key to stop autoboot: 2  1  0 MMC: no card present Card did not respond to voltage select! starting USB... USB0: USB EHCI 1.10 scanning bus 0 for devices... EHCI timed out on TD - token=0x80008c80 EHCI timed out on TD - token=0x80008d80 EHCI timed out on TD - token=0x80008c80 EHCI timed out on TD - token=0x80008c80 usb_get_configuration_no: failed to get descriptor - too long: 65460 usb_new_device: Cannot read configuration, skipping device 58f4:fffa 1 USB Device(s) found USB1: USB EHCI 1.10 scanning bus 1 for devices... 1 USB Device(s) found scanning usb for storage devices... 0 Storage Device(s) found scanning usb for ethernet devices... 0 Ethernet Device(s) found USB device 0: unknown device No ethernet found. missing environment variable: pxeuuid missing environment variable: bootfile Retrieving file: pxelinux.cfg/00000000 No ethernet found. missing environment variable: bootfile Retrieving file: pxelinux.cfg/0000000 No ethernet found. missing environment variable: bootfile Retrieving file: pxelinux.cfg/000000 No ethernet found. missing environment variable: bootfile Retrieving file: pxelinux.cfg/00000 No ethernet found. missing environment variable: bootfile Retrieving file: pxelinux.cfg/0000 No ethernet found. missing environment variable: bootfile Retrieving file: pxelinux.cfg/000 No ethernet found. missing environment variable: bootfile Retrieving file: pxelinux.cfg/00 No ethernet found. missing environment variable: bootfile Retrieving file: pxelinux.cfg/0 No ethernet found. missing environment variable: bootfile Retrieving file: pxelinux.cfg/default-arm-tegra124 No ethernet found. missing environment variable: bootfile Retrieving file: pxelinux.cfg/default-arm No ethernet found. missing environment variable: bootfile Retrieving file: pxelinux.cfg/default No ethernet found. Config file not found No ethernet found. Tegra124 (Nyan-big) #