Connection of Panasonic projector (LW373) is unstable. An Nvidia issue?

General system Newbie
1

Good morning, I have to connect my computer (EndeavourOS / Kde Plasma + Wayland Hyprland) to an Panasonic projector (PT-LW373 WXGA) via VGA cable + HDMI adapter, as soon as connected the image appears projected for 4-5 seconds and then goes out, after 10 seconds it reappears and goes out again, cyclically. I wouldn’t call it a flickering, but rather as if the automatic recognition is not stable.

I have tried both KDE-Plasma and Hyprland profiles, and I tried to set different modes with “envycontrol” : none of them seems to solve the problem (nor Integrated, nor Hybrid [when I tried “sudo envycontrol -s nvidia” I got problem at the reboot [i.e. the system did not boot, and I needed to open the rescue shell and run “envycontrol --reset” to solve the problem]).

Graphics:
Device-1: Intel WhiskeyLake-U GT2 [UHD Graphics 620] driver: i915 v: kernel
Device-2: NVIDIA GP108M [GeForce MX250] driver: nouveau v: kernel

The problem is with THIS projector (with others projectors or others external monitors everything is ok). But I did not find anyone having a particular problem with this device.

Unfortunately, I do not have access (7/24) to the projector because it is in a room where I have to teach. So I can’t stand to try various solutions right away. If anyone has an idea, on Wednesday I will try to solve the problem.

any ideas?
thank you.

best,
t

2

Does it work with X11 on KDE?

3

Can you try USB …

USB Display Function for Easy Projection Using a USB Cable

USB Display outputs images and sounds from the computer without the need to install any software.
Simply connect to the USB port with a single USB cable and start your presentation.*

*** The first time a USB cable is connected, a USB driver must be installed.**

Equipped with an HDMI Input Terminal and Abundant Interfaces

Extensive interfaces include an HDMI input terminal, 2 sets of computer (RGB) input terminals, a monitor (RGB) output terminal,
a wired LAN terminal, and a serial (RS-232C) terminal for external control.
These features support a wide range of system architectures for portable or ceiling-mounted use.

source:

1 Like
4

same behaviour as for wayland. It is unstable.

5

I will try it. Thanks