Just to confirm, you get video as normal until you load the video driver and reboot? So, when no driver is installed, the you get video display through HDMI or the DVI ports, correct?
Are you using the latest BIOS version for this motherboard? This is posted here:
What is the model and brand of the display you are testing with?
Hi Diego, yes I have video output before I install the Intel EMGD 1.15 generated driver package. IIRC, I have the latest BIOS.
Driver cant output anything when HDMI/DVI "change resolution" functions are invoked, i.e., when I try to change resolution after installing the driver before rebooting system or just when I boot the system and it naturally changes resolution on boot switching from VESA/VGA mode on driver load.
As I said, I tried many variants and could not get any output from HDMI or DVI using IEMGD. I tested it on two OEM brand monitors (this motherboard is intended to be use in the embedded applications). Both monitors work well with other hardware including notebooks/pcs/dev boards and etc., so problem is not in them, it is the HDMI/DVI resolution change/initialization routine wich is bugged. Also, as I said, I tried using hardcoded DTD for desired resolution which is 100% supported by my monitors, but this does not work either (this would solve the problem if it was in the EDID routine or something connected with EDID detection/parsing).
If you have any idea or need anything that can help (log files, debug output, etc..) I can provide it.
I was thinking about posting this to Intel Embedded Communities since this is "sort of" embedded board, but I dont have access to post there, unfortunately.
Thanks for answer,
Hope to get help.
I doublechecked BIOS and it is latest available. I also caught another weird bug - after blackscreen appears after boot, in approx. 2-7 minutes screen starts to flash with "signal-no signal" sequence. It looks like driver tries to recover itself, brings up the DETECT pin on DVI/HDMI, fails, quits and tries again and again...
Also, please, try to investigate something in upcoming 2-3 days, after 10.06 I will be forced to stop this project because of this bug with video and trust in Intel boards/software support in my company will be lost.