01-08-2016, 06:22 PM
Hi,
There are a myriad of HDMI cables,
some even have Ethernet included, but that is usually noted on packaging
For straightforward video use a standard cable, maybe 1.1/1.3 will suffice.
In my early days I was also having a black screen issues with my setup.
I only had one HDMI cable, and was swapping it between multiple PC's
1. Sometimes when I swapped between PC's I would end-up with a black screen.
I posted somewhere on here that was a Bug with XFCE.
But you have tried Ubuntu 15, so that rules out XFCE.
2. I have an AOC Monitor with 2 X HDMI & 1 VGA
When there is no signal, it goes to sleep, and defaults to VGA.
So if I switched on a PC it would blink, but it would not always stick to that input,
and it gave a black screen. In my case it was usually just after BIOS splash.
I suspect during boot, it is initialising the video, Get's an initial bit of a signal then
during boot/monitor detection, signal goes, monitor flips to saying no signal.
So in the AOC monitor I turned "Off" the auto detect.
Now I use the buttons on the monitor, 1 cycles through the ports, 1 makes it active
No more black screens or "No Signal" message.
See if your monitors got such options.
Given it worked with your TV,
I would check monitor settings 1st, does not cost anything, then try a new HDMI cable.
There are a myriad of HDMI cables,
some even have Ethernet included, but that is usually noted on packaging
For straightforward video use a standard cable, maybe 1.1/1.3 will suffice.
In my early days I was also having a black screen issues with my setup.
I only had one HDMI cable, and was swapping it between multiple PC's
1. Sometimes when I swapped between PC's I would end-up with a black screen.
I posted somewhere on here that was a Bug with XFCE.
But you have tried Ubuntu 15, so that rules out XFCE.
2. I have an AOC Monitor with 2 X HDMI & 1 VGA
When there is no signal, it goes to sleep, and defaults to VGA.
So if I switched on a PC it would blink, but it would not always stick to that input,
and it gave a black screen. In my case it was usually just after BIOS splash.
I suspect during boot, it is initialising the video, Get's an initial bit of a signal then
during boot/monitor detection, signal goes, monitor flips to saying no signal.
So in the AOC monitor I turned "Off" the auto detect.
Now I use the buttons on the monitor, 1 cycles through the ports, 1 makes it active
No more black screens or "No Signal" message.
See if your monitors got such options.
Given it worked with your TV,
I would check monitor settings 1st, does not cost anything, then try a new HDMI cable.
Upgrades WIP 2.6 to 2.8 - (6 X 2.6 to 2.8 completed on: 20/02/16 All O.K )
Linux Lite 3.0 Humming on a ASRock N3070 Mobo ~ btrfs RAID 10 Install on 4 Disks
Computers Early days:
ZX Spectrum(1982) , HP-150 MS-DOS(1983) , Amstrad CPC464(1984) , BBC Micro B+64(1985) , My First PC HP-Vectra(1987)
Linux Lite 3.0 Humming on a ASRock N3070 Mobo ~ btrfs RAID 10 Install on 4 Disks
Computers Early days:
ZX Spectrum(1982) , HP-150 MS-DOS(1983) , Amstrad CPC464(1984) , BBC Micro B+64(1985) , My First PC HP-Vectra(1987)