Dear Dong, On Friday 20 Jan 2017 12:11:50 DongCV wrote: > Dear Mr Laurent, > > Thank you for your quick reply. > This is the log file contains information about the command "modetest -M > rcar-du" (with the HDMI cable plugged). Thank you. I think I know what's wrong. The default mode picked by the system in your case uses positive H/V sync polarities, while in my cases the sync signals have negative polarities. Could you try to select 1024x768 @60Hz instead of 1024x768 @75Hz ? I think the HDMI output would then work correctly, which would confirm that the problem is indeed caused by sync polarities. I don't know why positive sync polarities are broken on Lager. I'll try to investigate that, but it will have to wait for two weeks as I'll be travelling until the 6th of February without access to my Lager board. -- Regards, Laurent Pinchart
