Graphic Card Resolution Librem 13v1

Hardware
1

Hi,
I have an older Librem 13v1 (the first 13" model from year 2016). I want to connect an external monitor which supports 2560 x 1440 (over DVI or DisplayPort). The laptop has only a HDMI 1.4 output, according to the specifications the graphic card should support a maximal resolution of 3840 x 2160 @ 24 Hz. I tried a HDMI to DVI dual link cable but the hightest resolution I get (on Debian - using Wayland) is 1900x1200.

Does someone know if is it possible at all to get higher resolution than FullHD over HDMI connecting an external display?

Thanks

2

The starting point would be: what Intel CPU is in that? Then look up the Intel web site for the specifications for the integrated GPU.

It may be that HDMI-to-DVI is making life more difficult. Does the monitor not support HDMI?

3

Thanks for your answer. Yes, that’s indeed what I did: it’s a Intel Core i5-5200U with an integrated Intel HD Graphics 5500. That’s what I meant with “according to the specifications”.

The monitor does support HDMI, but with lower resolution, a higher resolution is only through DisplayPort or DVI possible.

4

3840x2160 @60Hz via DisplayPort (not relevant here)

2560X1600 @60Hz via HDMI.

Maybe it’s a juggle between the sender (the Intel integrated GPU) and the receiver (the monitor) to find the highest common resolution, where resolution must always take into account the frame rate.

So what does the monitor say for HDMI support?

5

I had to update coreboot https://docs.puri.sm/Librem_13/Maintenance/Reinstalling_Coreboot.html to get 4K resolution on HDMI with a Librem13. Idk the changes made it into the coreboot for Librem13v1 too but it might be worth a try.

6

Monitor specifications say HDMI is 1.4 compatible and support resolutions up to 1920 x 1080. Higher resolutions are only possible via display port or DVI.

7

Thanks Guido, I will try that.

8

Unfortunately the coreboot update did not help.

9

@guido.gunther , may I ask:
you managed to get 4K resolution out of the HDMI port of your Librem.

  1. which kind of monitor are you using?
  2. are you connecting to the HDMI port on the monitor?
  3. which kind of cable/adapter are you using?

Thanks and regards

10

I just plugged my L13v1 (running PureOS and latest coreboot) into my Dell U3417W via HDMI and it works without issue at 3440x1440 @50Hz (default) and 2560x1080 @ 60Hz (manually selected via Display Settings)

11

Thanks ! That’s good to know, that means it would work for me as well, probably using another monitor.

12

If pursuing HDMI, make sure to use an appropriate cable, rather than some old HDMI cable that you have lying around. You would want a cable that is HDMI 1.4 or later (to match the laptop).

I don’t think you said what the screen size of the monitor is. Full HD (1920x1080) should be OK up to a certain size.

13
  • DELL U3219Q
  • yes
  • just an HDMI cable I had around

Hope that helps (sorry to hear the coreboot update didn’t help).

14

Thank you!

15

Thanks . I got a DVI to HDMI cable with dual link whose specifications claim to support the highest monitor resolution. The size of the monitor is 27".