<![CDATA[Display Port Output Lenovo Thinkpad T420S]]>Hi community,

First of all thank you for your work. Installation on my spare Lenovo Thinkpad T420S was a breeze and everything works...except plugging it into my TV using a Display Port to HDMI Cable 😉

Observed behavior:

  • Plug in T420S, TV registers HDMI connection
  • Boot System
  • TV recognizes T420S, starts to display boot process
  • Integrated display shows boot process
  • Integrated display and TV show different Recalbox boot videos
  • Integrated display jumps into ES, TV goes blank

When I connect via SSH xrandr --lsitmonitors only shows one monitor.

I wanted to set the screen and preferred resolution in recalbox.conf. Do you have any tips for me how to get this solved or where to investigate this further?

Regards
radi

]]>https://forum.recalbox.com/topic/23443/display-port-output-lenovo-thinkpad-t420sRSS for NodeWed, 13 May 2026 12:38:05 GMTWed, 17 Feb 2021 21:17:43 GMT60<![CDATA[Reply to Display Port Output Lenovo Thinkpad T420S on Sat, 20 Feb 2021 08:50:36 GMT]]>Thank you for your help.

As I said I tested a few settings with xrandr the other day and ran into the problems described above.

Today I wanted to proceed and started out with setting the external display settings in recalbox.conf. After reboot everything works now.

I wonder why the behavior was different when setting the same modes on my TV with xrandr.

Anyhow, works perfectly now! Now I can finally dive into some oldschool Gaming 😉

]]>https://forum.recalbox.com/post/163898https://forum.recalbox.com/post/163898Sat, 20 Feb 2021 08:50:36 GMT<![CDATA[Reply to Display Port Output Lenovo Thinkpad T420S on Thu, 18 Feb 2021 22:00:18 GMT]]>@radiskull I think this is what you are looking for:

]]>https://forum.recalbox.com/post/163848https://forum.recalbox.com/post/163848Thu, 18 Feb 2021 22:00:18 GMT<![CDATA[Reply to Display Port Output Lenovo Thinkpad T420S on Thu, 18 Feb 2021 20:41:41 GMT]]>@Zing: I just saw your post, thanks for the hint. Amazing how fast you get help in this community!

I tried some configurations using xrandr today and got it somehow to work.

I used display HDMI1 and set it to "preferred" mode. I then got an output on my TV (ES UI). However, it got only displayed in about 2 third of the screen (upper left corner, rest of screen is black).

When I start a game though, it is displayed on the whole screen.

Are there any additional configurations to "scale" ES UI?

Additional Info: Got the same result when connecting to a LCD display.

]]>https://forum.recalbox.com/post/163844https://forum.recalbox.com/post/163844Thu, 18 Feb 2021 20:41:41 GMT<![CDATA[Reply to Display Port Output Lenovo Thinkpad T420S on Thu, 18 Feb 2021 00:47:06 GMT]]>@radiskull Read this:

]]>https://forum.recalbox.com/post/163806https://forum.recalbox.com/post/163806Thu, 18 Feb 2021 00:47:06 GMT