HDMI output (on UHD-monitor)

[Slackstick 0]

Hello,

 

installed nightly image on OPI PC 2. I get a black monitor saying "no signal" and screen is black. But it does not go into sleep mode.

Dmesg output is :

[    1.273359] simple-framebuffer 7e05c000.framebuffer: framebuffer at 0x7e05c000, 0x1fa4000 bytes, mapped to 0xffff00000a000000
[    1.273367] simple-framebuffer 7e05c000.framebuffer: format=x8r8g8b8, mode=3840x2160x32, linelength=15360
[    1.420280] Console: switching to colour frame buffer device 480x135
[    1.566153] simple-framebuffer 7e05c000.framebuffer: fb0: simplefb registered!

AFAIK simple-framebuffer uses a framebuffer already initialized by the bootloader. So I suppose parameters between both don't match.

Same problem with OPI PC and mainline.

 

Is there a way to get hdmi output?

 

Thanks.

 

[zador.blood.stained 764]

1 minute ago, Slackstick said:

Same problem with OPI PC and mainline.

Which kernel and u-boot version? OPi PC2 uses an old u-boot and it will be 1.5-2 months before we switch to a new one with a supported display driver.

Display driver in u-boot 2017.05 had all known issues fixed already so it should work.

[Slackstick 0]

Welcome message for PC2 is:

Welcome to ARMBIAN 5.27.170529 nightly Ubuntu 16.04.2 LTS 4.11.1-sun50iw2   

Kernel is:

Linux orangepipc2 4.11.1-sun50iw2 #29 SMP Sun May 28 03:59:44 CEST 2017 aarch64 aarch64 aarch64 GNU/Linux

Don't know how to get u-boot version, but install is from nightly 170529.

 

BTW, crappy OPi distribution showed a picture, so hardware should be o.k.

[Slackstick 0]

Update:

Changed to current nightly.

Read that one HDMI input of my monitor is version 2.0 while the other is 1.4

changed the input sockets on my monitor

and voila, display shows up in 4k resolution

 

Thanks all!