I have recently updated and rebuilt my MM installation.
I can browse to my MM via a remote web browser and things display fine, however on the HDMI output of the PI itself I just have a black screen.

In the logs I see,

[1502:0115/164948.881957:ERROR:viz_main_impl.cc(186)] Exiting GPU process due to errors during initialization
[1538:0115/164949.052412:ERROR:gpu_memory_buffer_support_x11.cc(44)] dri3 extension not supported.
[1507:0115/164949.107262:ERROR:command_buffer_proxy_impl.cc(128)] ContextResult::kTransientFailure: Failed to send GpuControl.CreateCommandBuffer.

I wonder if anyone might be able to point me in the right direction.

@sdetweil
v10.24.0

I used manual upgrade running: git pull && npm run install-mm

Having applied the latest update I am having an issue starting.
Output as below.

Any pointers as to what might be going wrong?

> magicmirror@2.25.0 start /home/pi/MagicMirror
> DISPLAY="${DISPLAY:=:0}" ./node_modules/.bin/electron js/electron.js

[04.10.2023 17:23.09.921] [LOG]   Starting MagicMirror: v2.25.0
[04.10.2023 17:23.09.938] [LOG]   Loading config ...
[04.10.2023 17:23.09.944] [DEBUG] config template file not exists, no envsubst
[04.10.2023 17:23.09.954] [LOG]   Loading module helpers ...
[04.10.2023 17:23.09.956] [LOG]   No helper found for module: alert.
[04.10.2023 17:23.09.989] [LOG]   Initializing new module helper ...
[04.10.2023 17:23.09.991] [LOG]   Module helper loaded: updatenotification
[04.10.2023 17:23.09.992] [LOG]   No helper found for module: clock.
[04.10.2023 17:23.10.576] [LOG]   Initializing new module helper ...
[04.10.2023 17:23.10.577] [LOG]   Module helper loaded: MMM-Todoist
[04.10.2023 17:23.10.844] [LOG]   Initializing new module helper ...
[04.10.2023 17:23.10.844] [LOG]   Module helper loaded: calendar
[04.10.2023 17:23.10.846] [LOG]   No helper found for module: MMM-Test.
[04.10.2023 17:23.10.847] [LOG]   No helper found for module: MMM-DogAge.
[04.10.2023 17:23.10.848] [LOG]   No helper found for module: MMM-CalendarExt3.
[04.10.2023 17:23.10.906] [ERROR] (node:1324) UnhandledPromiseRejectionWarning: Error: Cannot find module 'html-to-text'
Require stack:
- /home/pi/MagicMirror/modules/default/newsfeed/newsfeedfetcher.js
- /home/pi/MagicMirror/modules/default/newsfeed/node_helper.js
- /home/pi/MagicMirror/js/app.js
- /home/pi/MagicMirror/js/electron.js
- /home/pi/MagicMirror/node_modules/electron/dist/resources/default_app.asar/main.js
- 
    at Module._resolveFilename (node:internal/modules/cjs/loader:1082:15)
    at n._resolveFilename (node:electron/js2c/browser_init:2:117457)
    at Module._resolveFilename (/home/pi/MagicMirror/node_modules/module-alias/index.js:49:29)
    at Module._load (node:internal/modules/cjs/loader:927:27)
    at f._load (node:electron/js2c/asar_bundle:2:13330)
    at Module.require (node:internal/modules/cjs/loader:1148:19)
    at require (node:internal/modules/cjs/helpers:110:18)
    at Object.<anonymous> (/home/pi/MagicMirror/modules/default/newsfeed/newsfeedfetcher.js:11:24)
    at Module._compile (node:internal/modules/cjs/loader:1269:14)
    at Module._extensions..js (node:internal/modules/cjs/loader:1324:10)
    at Module.load (node:internal/modules/cjs/loader:1124:32)
    at Module._load (node:internal/modules/cjs/loader:965:12)
    at f._load (node:electron/js2c/asar_bundle:2:13330)
    at Module.require (node:internal/modules/cjs/loader:1148:19)
    at require (node:internal/modules/cjs/helpers:110:18)
    at Object.<anonymous> (/home/pi/MagicMirror/modules/default/newsfeed/node_helper.js:10:25)
(Use `electron --trace-warnings ...` to show where the warning was created)
[04.10.2023 17:23.10.907] [ERROR] (node:1324) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
[1357:1004/172312.042226:ERROR:viz_main_impl.cc(186)] Exiting GPU process due to errors during initialization

I’ve written my own module to display a set of family tasks which rotate each week.
Once I’ve done some javascript to build a string of HTML, I display with.

        var element = document.createElement("div")
        element.className = "myContent
        element.innerHTML = output;
        return element

I just want to format this element with an existing magic mirror class so that the text doesn’t look massive and out of place, say “title” for example. But I can’t work out how to actually achieve that.

@MikeBishop I’m running MMM-Calendar3 and the default modules only.

@sdetweil said in Black screen on HMDI output, content on remote browser:

export ELECTRON_DISABLE_GPU=1

No error now, but still a black screen

@sdetweil said in Black screen on HMDI output, content on remote browser:

pm2 stop all
cd ~/MagicMirror
npm start >somefile.txt 2>&1

Errors are:
[2883:0119/213451.321388:ERROR:viz_main_impl.cc(186)] Exiting GPU process due to errors during initialization
[2916:0119/213451.509005:ERROR:gpu_memory_buffer_support_x11.cc(44)] dri3 extension not supported.

@sdetweil said in Black screen on HMDI output, content on remote browser:

lsb_release -a

Distributor ID: Raspbian
Description: Raspbian GNU/Linux 10 (buster)
Release: 10
Codename: buster

I am using ssh to remote into the pi
The following thread seems similar, but does not offer a solution
https://forum.magicmirror.builders/topic/17211/having-trouble-with-launch-perhaps-display-value?page=1

@sdetweil I am running the full desktop. yes.
This used to work but following a Magic Mirror and pi system update it no longer does.
I can see the desktop on boot up, but when pm2 runs the mirror then I get the blank screen.

@sdetweil
The platform failed to initialize.Missing X server or $DISPLAY

does electron window come up?

No. I get ./node_modules/.bin.electron: No such file or directory