Display Port Output Lenovo Thinkpad T420S

[radiskull]

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

[Zing]

@radiskull Read this:

• https://recalbox.gitbook.io/documentation/tutorials/video/display-configuration/configure-an-external-display-x86-x86_64
• https://forum.recalbox.com/topic/23355/show-recalbox-running-on-dell-e6420-laptop-to-projector-tv-using-hdmi

[radiskull]

@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.

[Zing]

@radiskull I think this is what you are looking for:

• https://recalbox.gitbook.io/documentation/tutorials/video/display-configuration/complete-guide-on-video-configuration
• https://recalbox.gitbook.io/documentation/tutorials/video/display-configuration/adjusting-the-image-size-using-overscan

[radiskull]

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