LCD 15" Touch Panel Dead on Arrival

Hi all,

I'm having difficulty getting the UDOO 15" LCD Touch Panel to work with UDOO QUAD board. It appears the QUAD board can't detect the LCD panel. Uboot console indicates no LCD panel detected. Console log below. Yes, I double checked connectors are fully seated. I confirmed DC supply voltages are present on the UDOO board side of interconnecting cable.

The other side at the LCD panel is a bit dicey to probe... I'm using the latest Ubunto image (UDOObuntu_quad_v1.0.img, U-Boot 2013.10-rc3) from UDOO web site. I might have to return the 15" LCD panel to mothership, UDOrg. Any debug tip is appreciated.

Additional info: UDOO QUAD board works fine with HDMI display with UDOObunto and Android Jellybean. Getting the board to work with the 15" LVDS panel has not been a plug-n-play experience

Regards,

John C.


***These are my comments*****************
boot into Ubuntoo 1.0 Linux using HDMI display
changed default to display 15" LCD
powered off
inserted LVDS high speed conn, and touch USB
powered on
console out follows:
****************************************



U-Boot 2013.10-rc3 (Jan 20 2014 - 13:33:34)

CPU: Freescale i.MX6Q rev1.2 at 792 MHz
Reset cause: POR
Board: UDOO
DRAM: 1 GiB
MMC: FSL_SDHC: 0
No panel detected: default to LDB-WVGA
Display: LDB-WVGA (800x480)
In: serial
Out: serial
Err: serial
Net: using phy at 6
FEC [PRIME]
Hit any key to stop autoboot: 0
UDOO board =>

UDOO board => printenv
baudrate=115200
boot=echo No boot source specified
bootargs_base=setenv bootargs console=ttymxc0,115200
bootargs_nfs=setenv bootargs $(bootargs) root=/dev/nfs ip=dhcp nfsroot=$(serverip):$(nfsrootfs),v3,tcp
bootcmd=run ${src}boot; run sataboot; run mmcboot; run netboot;
bootcmd_net=run bootargs_base bootargs_mtd bootargs_nfs; tftpboot 0x81000000 uImage-mx31; bootm
bootdelay=5
console=ttymxc1
ethact=FEC
ethaddr=00:c0:08:88:20:43
ethprime=FEC
get_cmd=ntp
ipaddr=dhcp
loadaddr=0x12000000
memory=fbmem=24M gpu_reserved=128M
mmcargs=setenv bootargs console=${console},${baudrate} root=${mmcroot} ${hdmi_patch} ${memory} ${video}
mmcboot=if mmc rescan; then echo Booting from mmc ...; run mmcloaduimage; run mmcargs; bootm; else mmc boot failed; fi
mmcdev=0
mmcloaduimage=ext2load mmc ${mmcdev}:${mmcpart} ${loadaddr} ${uimage}
mmcpart=1
mmcroot=/dev/mmcblk0p1 rootwait rw
netargs=setenv bootargs console=${console},${baudrate} root=/dev/nfs ${hdmi_patch} ${memory} ${video} ip=${ipaddr} nfsroot=${serverip}:${nfsroot},v3,tcp
netboot=echo Booting from net ...; run netargs; ${get_cmd} ${uimage}; bootm
nfsroot=/src/nfs4/
prg_uboot=tftpboot 0x81000000 u-boot-with-spl.bin; nand erase 0x0 0x40000; nand write 0x81000000 0x0 0x40000
sataargs=setenv bootargs console=${console},${baudrate} root=${sataroot} ${hdmi_patch} ${memory} ${video}
sataboot=if sata init; then echo Booting from sata ...; run sataloaduimage; run sataargs; bootm; else sata boot failed; fi
satadev=0
sataloaduimage=ext2load sata ${satadev}:${satapart} ${loadaddr} ${uimage}
satapart=1
sataroot=/dev/sda1 rootwait rw
serverip=192.168.1.1
splashpos=m,m
src=sata
uimage=/boot/uImage
video=video=mxcfb0:dev=ldb,1366x768M@60,if=RGB24,bpp=32

 

Hello UDOO Team,

The panel had been confirmed dead. Trying another panel works (after resetting display env var per UDOO tech support). UDOO customer support had sent a replacement panel. UDOO support on this LCD issue is appreciated. As a gesture of thanks and vote of confidence in UDOO, my organization had placed orders for more LCD panels, UDOO boards, and accessories.

Regards,

John C.
2014-11-24