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Energy settings in Gnome-Shell parameters are set so that the monitor turns off after 5 minutes of inactivity. The screen does indeed go black, but never turns off. A small diode on the side of the screen allows to control it and in the dark, you can clearly see the light emitted by the screen.
When I write in a terminal:
sleep 2 && xset dpms force off
The screen goes black, then 10 seconds later, turns back on and the screen shows during a few seconds a small white square with HDMI written in it.
I disable gdm and activate lightdm, restart the computer : same behavior. I install fluxbox and start it (with gdm or lightdm) and it's work smoothless. When I "xset dpms force off" : the monitor really turns off. So it's seems that this is indeed a Gnome-Shell problem.
I tried different trics I found on the internet, including the dpms page on the wiki, without really understanding everything, with no results. I have no more ideas to try.
Any idea is welcome !
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## Informations liées au matériel :
- Modèle du matériel : Micro-Star International Co., Ltd. MS-7C94
- Mémoire : 16,0 Gio
- Processeur : AMD Ryzen™ 5 5500 × 12
- Carte graphique : AMD Radeon™ RX 6500 XT
- Capacité du disque : 5,0 To
## Informations liées au logiciel :
- Version du micrologiciel : 1.90
- Nom du système d’exploitation : Arch Linux
- Construction du système d’exploitation : rolling
- Type de système d’exploitation : 64 bits
- Version de GNOME : 46
- Système de fenêtrage : X11
- Version du noyau : Linux 6.9.9-arch1-1
Monitor : MSI Pro MP223 Series
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