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Most of the DVI monitors we've tried display nothing when connected to an IGEPv5 some do display but the picture is only present intermittently, on some monitors it can be fine 99% of the time others only 1% :-(
I know that it is referred to as an HDMI output but all the information I can find says the HDMI standard is backwardly compatible with DVI (Sound obviously being an exception)
P28 of 66 of the IGEPv5 hardware reference manual says:
"OMAP5432 processor has an embedded HDMI module with the next features: HDMI 1.4, HDCP 1.4, and DVI 1.0 compliant"
Anyone else having the same problem?
We've tried three different boards.
Chris Evans
Responses (8)
  • Accepted Answer

    Tuesday, June 28 2016, 01:42 PM - #permalink
    0
    Hi Chris,

    I tested IGEPv5 HDMI without issue with the following DVI displays: LG FLATRON E2360 and Acer K242HQL.

    I have some questions regarding this problem:

    Do you have videos issues with HDMI displays?

    Can you test with a newer Firmware? You can follow this manual to prepare a new SD:

    https://isee.biz/support/is-it-possible-to-get-an-updated-omap5-igep0050-dts-please

    Cheers!
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  • Accepted Answer

    Monday, July 04 2016, 05:31 PM - #permalink
    0
    Thanks for the pointer Pau.
    I looked at that thread and found a tar file. Though that seems to be of March 2014 vintage:-(
    We want to use it with RISC OS which uses modified firmware. Before we start trying that I'd like to test the latest firmware with a linux version to confirm how well it works on DVI. Is there anywhere I can get a complete SD image with the latest firmware please?. Or is there anyone who would be kind enough to create one please. I'm sure other people would also find it useful.
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  • Accepted Answer

    Tuesday, July 05 2016, 09:49 AM - #permalink
    0
    Hi Chris,

    Latest firmware uses Ubuntu 12.04 and Kernel 3.8, because it is based on newest TI BSP Release:

    http://processors.wiki.ti.com/index.php/OMAP5_GLSDK_6.03.00.01_Release_Notes

    The only important part to test DVI is Kernel, so you can use Ubuntu 12.04 plus Kernel 3.8 or Ubuntu 12.04 plus Mainline Kernel (tested with kernel 4.3RC and 4.6).

    Once you validated DVI, you can try another hard float armv7 distro as root file-system.

    Cheers!
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  • Accepted Answer

    Saturday, July 09 2016, 05:50 PM - #permalink
    0
    Thanks again Pau. Unfortunately I have never built anything for Ubuntu etc. and wouldn't know where to start. I could commission someone to do what you suggest but without any certainty that the latest Firmware will fix the DVI problem I couldn't justify the cost. I'd have thought various people would have done builds with the latest firmware. If someone who has could do an SD image with enough to test various monitor resolutions I'd be very gratefull.
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  • Accepted Answer

    Monday, July 11 2016, 01:38 PM - #permalink
    0
    Hi Chris,

    The result of the steps from above is the next image:
    https://www.dropbox.com/s/z7h6enucdd05qwt/omap5-igep0050-kernel-mainline-4.6.3.img.zip?dl=0

    Uncompress it and copy img file to a 4GB SD card: sudo dd bs=4M if=/home/ppajuel/Escritorio/omap5-igep0050-kernel-mainline-4.6.3.img of=/dev/sdX

    Where /dev/sdX is how Linux enumerates your SD card

    Cheers!
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  • Accepted Answer

    Monday, July 11 2016, 06:00 PM - #permalink
    0
    Brilliant! Pau you are a star.
    I've downloaded it and will write an SD card in the morning.

    I will report back the results I get.

    I hope your hard work will benefit others as well.

    Thank you very much.

    Chris
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  • Accepted Answer

    Thursday, July 14 2016, 06:43 PM - #permalink
    0
    Sorry to say I've not got very far so far with SD image. I wrote the image to a 4GB card using win32diskimager but it doesn't boot:-(
    If I access it on RISC OS or Windows in a card reader I can see the 70MB FAT partition with MLO and u-boot.img

    So I thought I'd try and write an SD card on the IGEP itself with your instructions but neither of the two linux SD cards that came with the IGEP boot fully. Previously I've only ever tried getting as far as the two penguins top left followed by the "The system is running in low graphics mode" I turned off at this point as I had no use for Linux. (My main monitor is 2048x1152)
    Now selecting 'exit to console log in' hangs at either

    * stopping anac(h)ronistic crom
    * starting crash report submission daemon

    flashing cursor next line

    next boot had after the messages above:
    amixer cannot find the given element from control default (no asterix at start of line)

    * stopping system v run level compatibility

    flashing cursor next line

    Maybe I'll try my other board but the first one that produced the errors boot into RISC OS from eMMC fine so I don't offer much hope.

    n.b. I get no display (On screen "HDMI no cable connected") with any of the three SD cards on a standard HDMI input 1920x1080 monitor. I've tried different HDMI cables but as RISC OS is fine with them I can't see they could be an issue.
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  • Accepted Answer

    Wednesday, July 20 2016, 10:25 AM - #permalink
    0
    Hi Chris,

    I suggest you use dd with native or virtual Ubuntu OS into your Workstation

    Send your Kernel log to check out your problem

    Cheers!
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