Using the command line tools, I noticed that the 570x was not detecting the display. Removing the HDMI cable and then reinserting it made the system recognize the display.
I've seen the same problem, but it depends on the monitor. Some monitors are no problem, others don't want to cooperate. I also only see the problem with the carrier board included in the development kit. I happen to have a different carrier I am working on, and I have never had this problem, so the problem seems specific to the HDMI implementation on the carrier in the dev kit.... not the Joule module itself.
Fixes to try: (1) plugging in the monitor AFTER booting (2) plugging/unplugging after booting (3) running the HDMI cable through an HDMI amp or powered splitter (4) if using an HDMI monitor powered off USB, use a powered USB hub connected to the Joule rather than a separate power supply (there can be a problem with grounds not being consistent if an external power adapter is used; I don't know if this is the problem here, but I've seen it before with portable USB-powered monitors).
If (1) or (2) works for you, great! (3) costs extra but is handy when travelling and you know you will need to plug into some unknown monitor/projector for demos with limited time to sort out issues. (4) is specific to portable USB-driven monitors.
I don't have an HDMI amp or splitter, but connecting the monitor after the boot of the reference OS works.
HDMI output is also not working for me and the suggestions above sadly did not change anything (I didn't try a HDMI amp since I don't have one). I can access the Joule over serial console just fine (running pre-installed Ostro Linux) but no signal on the monitor. Monitor+Cable are working with other computers.
Any other suggestions what I could try? I bought the Joule explicitly for one particular use case requiring a working monitor, so this is kind of a deal-breaker for me.
Thanks for your help!
1. Boot the Joule up without connecting the HDMI
2. Plug in the monitor
3. Run "
See if the monitor is detected and if the resolution is correct. If the resolution is not right follow the example at command line - How to set custom resolution using xrandr when the resolution is not available in 'Display Settings' - Un…
Thanks a lot for your quick and helpful answer! Sadly it seems that the display is not recognized at all:
root@intel-corei7-64:~# xrandr -q
Can't open display
When I plug in the HDMI cable the monitor changes from "Check cable connection" to "No video input" so at least the monitor realizes that something changed but HDMI handshake seems to fail completely.
Do you have any other suggestions or options I could try?
Thank you very much!
I don't have my joule with me today, so I'm flying blind.
Is the DISPLAY environment set at any time? If not "export DISPLAY=:0.0" and try xrandr with the monitor connected.
DISPLAY is not set, when I do set it and plug the monitor in, this is what I get (takes around 1-2 minutes):
root@intel-corei7-64:~# printenv | grep DISPLAY
root@intel-corei7-64:~# export DISPLAY=:0.0
root@intel-corei7-64:~# xrandr -q
Can't open display :0.0
I'll buy another (shorter) HDMI cable tomorrow and test that, maybe the HDMI output of the Joule is just to weak/low quality to work as I'm using a quite long cable (around 5 meters). Since I eventually plan to install Ubuntu I need HDMI to work on boot already as the Ubuntu installation procedure seems to require that.
In the the meantime, if you have any further ideas please do let me know!
I now tested with a different, short HDMI cable but still no signal. Anyone here from Intel who can comment on this issue?
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Was this solved for Michael?
I have the same problem. I have tried all the suggestions in this thread but no luck.
Any ideas how I could get the HDMI output working?
I've been trying with "Ostro OS XT 1.0+snapshot-20161014"