[arch-general] 2x 1440p displays not working on thunderbold dock anymore

[Ricardo Band]

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Ahoi,

I use Arch on a Thinkpad T480 with the Lenovo Thunderbold 3 dock. I've
attached 2 1440p monitors to it and I was using them for a while now.
For a few days or so I can't get them to work anymore. Usually I
disable my Notebooks internal screen and enable the 2 1440p displays
like this:

```
xrandr --output DP1-1 --mode 2560x1440 --refresh 144
xrandr --output eDP --off
xrandr --output DP1-2 --mode 2560x1440 --refresh 144 --right-of DP1-1
```

This used to work quite nicely. No idea if the refresh rate actually
worked. I have no way to test that but the resolution sure did.

Now when I do this I get this error:

```
xrandr: Configure crtc 0 failed
```

I can only drive both displays at 1920x1080. When I increase the
resolution to 2560x1440 I get this error and the higher resolution
can't be set.

I don't know why this doesn't work anymore. Could it be a driver issue?
I've got a nvidia GPU with the proprietary driver and the integrated
intel with the open source driver and it wouldn't be the first time
intel or nvidia fucked their drivers up.

- -- 

Greetings

Ricardo Band

 https://   www.ricardo.band
mailto:// email at ricardo.band
  xmpp://jabber@ricardo.band
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