HDMI 2.0 UHD 60Hz sound out

zzarr

Hello!

I have a RK3288-plus, I have installed the latest version of Ubuntu 16.04 on it.

I have a Display with HDMI 2.0 input and a resolution of 3840x2160, it have built in speakers. (The HDMI cable is capable of UHD too.)

When I hook up the RK3288 to the display over HDMI it works fine with 1080p, but when I set it to 3840x2160@30 about a fifth of the display on the right side are just random lines.
(I ran "xrandr --output HDMI-1 --mode 3840x2160" in a terminal.)

But, what I really want is 3840x2160@60, the hardware is capable, but how to?

Where's no option for sound out over HDMI ether, how do I fix this?

Best Regards
/ Rasmus

isle

Hi  
1 did you get the UHD resolution in "start->Setting->Display->Resolution"
2 what did you get in "start->Multimedia->PulsAudio Volume Control->Output Devices"

zzarr

Hello isle!

Graphic:
I can select the option 3840x2160  but the same thing happens as when selected via xrandr still those lines on the right side.
I tried all available options, 30, 25 and 24Hz (60Hz) is not available.

Sound:
The only option is "Analog Output"

Best Regards
/ Rasmus

zzarr

Hello again!

I just saw something strange when I ran "mount", "/dev/mmcblk2p3 on / type ext4 (ro,relatime,data=ordered)".
I can't change any file in the file system due to / being read only.

Best Regards
/ Rasmus

isle

Hi,
which firmware did you use? could you try a firmware named *NO_VGA*?
I think, the HDMI display  connect to "VOP little"  which can only support 2560X1600.
so .disable the VGA display then the HDMI display will connect to "VOP BIG"

zzarr

Hi again!

I used the stable version of Ubuntu 16.04 (20170525).

I can't see any VGA with xrandr, is there a way to check if the HDMI connects to VOP little or big?

Best Regards
/ Rasmus

isle

in your kernel log,

zzarr

Hi again!

I could not find any entry in the kernel log or dmesg that shows any info about VOP.

The only 3 lines that matches are following:

[    1.522579] rockchip-drm display-subsystem: failed to bind ff980000.hdmi (ops 0xc0c4e334): -517
[    3.406068] dwhdmi-rockchip ff980000.hdmi: Detected HDMI controller 0x20:0xa:0xa0:0xc1
[    3.406438] rockchip-drm display-subsystem: bound ff980000.hdmi (ops 0xc0c4e334)

I got them by running "dmesg | grep hdmi" in a terminal.

Best Regards
/ Rasmus

isle

Could you try the firmware with "NO_VGA" ?

zzarr

Hello!

Yes I will do that.

Other whys, is it a setting or would I need to rebuild the kernel?

Best Regards
/ Rasmus