Tested on:
ubuntu@ubuntu:~$ uname -a
Linux ubuntu 2.6.35-1008-linaro-omap #15-Ubuntu Fri Oct 22 11:56:29
UTC 2010 armv7l GNU/Linux

ubuntu@ubuntu:/sys/class/leds$ ls  /sys/class/leds/
gpio-led:green:d0  gpio-led:green:d1  gpio-led:red:d0  gpio-led:red:d1

root@ubuntu:/sys/class/leds# echo 1 > gpio-led\:green\:d0/brightness
root@ubuntu:/sys/class/leds# echo 0 > gpio-led\:green\:d0/brightness

root@ubuntu:/sys/class/leds# echo 0 > gpio-led\:green\:d1/brightness
root@ubuntu:/sys/class/leds# echo 1 > gpio-led\:green\:d1/brightness

root@ubuntu:/sys/class/leds# echo 0 > gpio-led\:red\:d0/brightness
root@ubuntu:/sys/class/leds# echo 1 > gpio-led\:red\:d0/brightness

root@ubuntu:/sys/class/leds# echo 1 > gpio-led\:red\:d1/brightness
root@ubuntu:/sys/class/leds# echo 0 > gpio-led\:red\:d1/brightness


2010/11/8 Launchpad Bug Tracker <email address hidden>:
> This bug was fixed in the package linux-linaro - 2.6.35-1008.15
>
> ---------------
> linux-linaro (2.6.35-1008.15) maverick-proposed; urgency=low
>
>  [ Robert Nelson ]
>
>  * SRU: Fix DVI for Beagle xM rev A3
>    - LP: #663642
>
> linux-linaro (2.6.35-1008.14) maverick-proposed; urgency=low
>
>  [ Andy Whitcroft ]
>
>  * reduce disk usage during buildd builds
>    - LP: #645653
>
>  [ Enric Balletbo i Serra ]
>
>  * ARM: igepv2: Adding support for VBUS and overcurrent
>    - LP: #651589
>  * ARM: igepv2: Fix and improve LED handling
>    - LP: #654582
>  * ARM: igepv2: Introduce function to dectect HW version
>    - LP: #654586
>  * ARM: igepv2: Fix handling of GPIOs for WLAN-BT combo
>    - LP: #654590
>  * ARM: igepv2: Add i2c eeprom driver to read EDID
>    - LP: #654594
>  * ARM: igepv2: Remove VMMC2 regulator
>    - LP: #654595
>
>  [ Maurus Cuelenaere ]
>
>  * SAUCE: ARM: OMAP3: Add S-Video output to IGEPv2 board
>    - LP: #607250
>
>  [ Upstream Stable ]
>  * Linux 2.6.35.7
>
>  [ Upstream MMC updates ]
>
>  * mmc: recognize CSD structure
>  * mmc: split mmc_sd_init_card()
>  * mmc: implement SD-combo (IO+mem) support
>  * sdhci: remove useless set_clock() check
>  * sdhci: 8-bit data transfer width support
>  * sdhci: don't assign mmc->caps at SDHCI directly
>  * mmc: only set blockaddressed for > 2GiB cards
>  * mmc: omap: fix for bus width which improves SD card's peformance.
>  * sdhci-pltfm: switch to module device table matching
>  * sdhci-pltfm: reorganize Makefile entries to support SoC devices
>  * sdhci-pltfm: add support for CNS3xxx SoC devices
>  * omap hsmmc: fix processing of all dma interrupts as block completion
>  * sdhci: add regulator support
>  * sdhci: add no hi-speed bit quirk support
>  * mmc: avoid getting CID on SDIO-only cards
>  * omap_hsmmc: remove unused local `state'
>  * omap hsmmc: fix a racing case between kmmcd and omap_hsmmc_suspend
>  * drivers/mmc/host/imxmmc.c: adjust confusing if indentation
>  * mmc: sdhci-pltfm: Add structure for host-specific data
>  * mmc: sdhci-pltfm: move .h file into appropriate subdir
>  * mmc: sdhci: introduce get_ro private write-protect hook
>  * mmc: sdhci_pltfm: pass more data on custom init call
>  * mmc: sdhci-of-esdhc: factor out common stuff
>  * mmc: sdhci-pltfm: add -pltfm driver for imx35/51
>  * mmc: quirk fix for timeout problem
>  * babbage: esdhc device registration
>  * babbage: update mx51_defconfig
>    - LP: #656966
>
>
>  [ Upstream ARM fixes ]
>
>  * Make PTRACE_SINGLESTEP work with user helpers
>  * ARM: fix section mismatch warnings in Versatile Express
>  * ARM: use memblock to remove memory from available memory
>  * video: omap: vram: remove from normal memory
>    - LP: #627779
>
>  [ John Rigby ]
>  * LINARO: update configs
>    - LP: #659799
>
> linux-linaro (2.6.35-1007.13) maverick; urgency=low
>
>  [ Upstream Ubuntu ]
>
>  * Ubuntu-2.6.35-22.33
>  * Ubuntu-2.6.35-22.34
>
>  [ Upstream ARM Fixes ]
>
>  * ARM: vexpress: set RAM latencies to 1 cycle for PL310 on ct-ca9x4 tile
>  * ARM: vexpress: set RAM latencies to 1 cycle for PL310 on ct-ca9x4 tile
>  * ARM: add a vma entry for the user accessible vector page
>  * ARM: plug a race with the alignment trap handler
>  * arm: fix really nasty sigreturn bug
>  * ARM: prevent multiple syscall restarts
>  * ARM: 6387/1: errata: check primary part ID in proc-v7.S
>  * ARM: 6388/1: errata: DMB operation may be faulty
>  * ARM: 6389/1: errata: incorrect hazard handling in the SCU may lead to
>    data corruption
>  * ARM: 6398/1: add proc info for ARM11MPCore/Cortex-A9 from ARM
>  * kconfig: delay symbol direct dependency initialization
>  * ARM: kprobes-decode: add support for MOVW instruction
>  * ARM: errata: check primary part ID in proc-v7.S
>  * ARM: errata: DMB operation may be faulty
>  * ARM: errata: incorrect hazard handling in the SCU may lead to data
>    corruption
>  * ARM: errata: faulty hazard checking in the Store Buffer may lead to
>    data corruption
>  * ARM: Fix HWCAP_TLS flag for ARM11MPCore/Cortex-A9
>
>  [ Ricardo Salveti ]
>  * ARM: OMAP3: Add S-Video output to IGEPv2 board
>    - LP: #607250
>  * ARM: OMAP3: Adding vdd_sdi regulator supply to IGEPv2 board
>    - LP: #607250
>
>  [ Upstream Stable Releases ]
>  * 2.6.35.5
>  * 2.6.35.6
>
>  [ Upstream ftrace support ]
>
>  * ARM: 6312/1: ftrace: allow building without frame pointers
>  * ARM: 6314/1: ftrace: allow build without frame pointers on ARM
>  * ARM: 6315/1: ftrace: add ENDPROC annotations
>  * ARM: 6316/1: ftrace: add Thumb-2 support
>  * ARM: 6317/1: ftrace: pass KBUILD_CFLAGS to record_mcount.pl
>  * ARM: 6318/1: ftrace: fix and update dynamic ftrace
>  * ARM: 6319/1: ftrace: add Thumb-2 support to dynamic ftrace
>  * ARM: 6320/1: ftrace: enable dynamic ftrace
>
>  [ Nicolas Pitre ]
>
>  * ARM: implement CONFIG_STRICT_DEVMEM by disabling access to RAM via
>    /dev/mem
>  * ARM: bring SECCOMP behavior in sync with the version in mainline
>  * ARM: do not define VMALLOC_END relative to PAGE_OFFSET
>
>  [ John Rigby ]
>
>  * LINARO: Start new release
>  * LINARO: Bump ABI
>  * LINARO: update configs
>  -- John Rigby <email address hidden>   Thu, 21 Oct 2010 11:01:14 -0600
>
> ** Changed in: linux-linaro (Ubuntu Maverick)
>       Status: Fix Committed => Fix Released
>
> --
> 4 LEDs on IGEPv2 board are not initialized/working
> https://bugs.launchpad.net/bugs/654582
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in “linux-linaro” package in Ubuntu: New
> Status in “linux-linaro” source package in Maverick: Fix Released
>
> Bug description:
> The LEDs on the IGEPv2 board are not working.
>
> To unsubscribe from this bug, go to:
> https://bugs.launchpad.net/ubuntu/+source/linux-linaro/+bug/654582/+subscribe
>