RTX 4070 Super DisplayPort does not work on Ubuntu 22.04

Graphics / Linux Linux
1

I’ve just bought an RTX 4070 Super, and upon installing it, the DisplayPort does not work. It does not output any image to the monitor connected via DisplayPort; it only outputs via HDMI.

I have tried nvidia-353 and nvidia-550, and the problem is the same on both.

I’m not really sure if this is a Linux-specific issue, because if I connect a monitor ONLY through DisplayPort (and leave the HDMI port unplugged), even the BIOS does not output anything. I contacted your customer support via ‘Live Chat’ already, but they directed me to this forum since I’m running Linux; but it does seem like the BIOS itself is having issues too.

The monitor in question is connected via a HDMI-to-DisplayPort cable, which worked fine on the GTX 960. Neither of my monitors support DisplayPort directly, and the GPU has only 1 HDMI port.

What can I do to fix this issue? I have no other way to use two screens because there is only one HDMI port.

2

Rather sounds like either the displayport connector or the cable is broken. Already tried a different DP2HDMI cable?

3

The same HP2HDMI cable worked on the GTX 960 so probably unlikely that it’s broken. I did see some posts suggesting that ‘passive’ adapters might not work, so I bought an ‘active’ one to try it out. It won’t arrive until tomorrow so I have to wait until then for results.

If the replacement cable doesn’t work, is there anything more to try beyond returning this on warranty?

4

Passive adapters should work as well, only being limited in resolution/refresh rate.
If the other adapter doesn’t work either, you can only return the card, it’s broken.

5

I tried it with the active DP2HDMI cable and now it works. I have no idea why the passive one didn’t; perhaps I broke it while putting the new GPU in.

Either way, it works now, thanks for your help.