DVI-D to HDMI adapter

Support
1

I have an old GPU that can do 1080p from HDMI and 1440p from DVI-D.

My old 1080p monitor died a few days ago and I got an 4k monitor.

In order to use my GPU at 1440p I got a DVI-D to HDMI adapter but

it causes problems. The computer boots up fine but when it tries to boot ALMA (and

UBUNTU and OpenMandriva and Fedora) the screen goes black. Windows on the

other hand works fine. The adapter itself is passive ie no signal conversion.

Any ideas how to deal with this ?

2

Hi.
Could you share the exact GPU model (vendor + model name/number)?
Also, what is the exact 4K monitor model (manufacturer + model number)?
thanks

3

A second question, does it eventually show the login prompt? I.e. if you just wait the normal length of time for boot up on your machine, does video appear when X/Wayland starts up?

4

To answear the request of redadmin the graphics card is an old Sapphire RadeonHD

6570 and the monitor is a LG 27UP600 -W.

To answear the question of furicle in the case of openmandriva it goes up to the

selection of operating systems to boot. In all other cases the monitor goes black

when it tries to boot the operating system.

The adapter is dual link if anybody wonders. Resolution on Windows goes up to 1080p

only. The sound card is disabled in the uefi and the speakers are connected to the back

of the monitor. On Windows the sound goes via DVI-D to HDMI and I have sound via

DVI-D . How weird is that huh ?

5

So even there you cannot get 1440p.

The monitor could do 2160p, which is twice the 1080p (4 times pixels), while 2160p is not a nice multiple of 1440p.

Your Saphire has HDMI, DVI, and VGA? Your LG has 2 HDMI and a DP.
What if you just connect HDMI to HDMI?
That should give the 1080p that is most you have seen so far with the LG anyway.

6

Understood.
I agree with jlehtone. At this point it looks like I’ll need to test a few combinations (GPU output / cable / DVI-D to HDMI adapter) to narrow down where the limitation or black screen is coming from. I’ll start with a direct HDMI-to-HDMI connection (no adapter) and report back with the results.