Dear all, My UDOO-quad was turned off a lot of time. I created a new bootable microSD with UDOObuntu LTS this morning and when I turned on the board, I read this via serial connection: What's the problem? Thank you in advance U-Boot 2015.10-00061-g68849f9 (Jan 08 2016 - 17:01:43 +0100) CPU: Freescale i.MX6Q rev1.2 at 792 MHz Reset cause: POR Board: UDOO Quad DRAM: 1 GiB MMC: FSL_SDHC: 0 *** Warning - bad CRC, using default environment No panel detected: default to HDMI Display: HDMI (1024x768) In: serial Out: serial Err: serial Net: using phy at 6 FEC [PRIME] Hit any key to stop autoboot: 0 switch to partitions #0, OK mmc0 is current device reading uEnv.txt 52 bytes read in 10 ms (4.9 KiB/s) Running bootscript from mmc ... Device Tree: dts/imx6q-udoo-hdmi.dtb reading zImage 4546472 bytes read in 234 ms (18.5 MiB/s) Booting from mmc ... reading dts/imx6q-udoo-hdmi.dtb 41714 bytes read in 24 ms (1.7 MiB/s) Kernel image @ 0x12000000 [ 0x000000 - 0x455fa8 ] ## Flattened Device Tree blob at 18000000 Booting using the fdt blob at 0x18000000 Using Device Tree in place at 18000000, end 1800d2f1 Starting kernel ... [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 3.14.56-udooqdl-02015-g8c051b6 (udooer@udoo) (gcc version 4.8.4 (Ubuntu/Linaro 4.8.4-2ubuntu1~14.04.1) ) #2 SMP PREEMPT Wed Apr 27 11:37:54 UTC 2016 ... [ 2.427522] random: nonblocking pool is initialized After several time (less then 20min): [ 602.283765] mmc0: Card stuck in programming state! mmcblk0 mmc_blk_err_check [ 602.290909] end_request: I/O error, dev mmcblk0, sector 67584 [ 602.296683] Buffer I/O error on device mmcblk0p2, logical block 0 [ 602.302781] lost page write due to I/O error on mmcblk0p2 [ 602.308212] end_request: I/O error, dev mmcblk0, sector 67592 [ 602.313980] Buffer I/O error on device mmcblk0p2, logical block 1 [ 602.320078] lost page write due to I/O error on mmcblk0p2 [ 612.343802] mmc0: Timeout waiting for hardware interrupt. [ 612.349250] ------------[ cut here ]------------ [ 612.353911] WARNING: CPU: 0 PID: 0 at drivers/mmc/host/sdhci.c:997 sdhci_send_command+0xc50/0xdf8() [ 612.363800] ---[ end trace 8bdab3ec4231f21b ]--- [ 612.368729] mmcblk0: error -110 sending stop command, original cmd response 0x0, card status 0x400f00