On Wednesday 25 January 2023, Masaru Nomiya wrote:
Hello,
In the Message;
Subject : [oS-EN] New monitor when sent to sleep doesn't awake Message-ID :
Date & Time: Tue, 24 Jan 2023 20:31:33 +0100 [CER] == "Carlos E. R."
has written: CER> Hi,
CER> I have a new monitor on this old machine at a secondary location. Got it cheap, CER> a returned item to a shop. An LG 22MP410, connected to my old machine with CER> Nvidia graphics.
CER> The problem is that (apparently) when the desktop sends the CER> display to sleep for inactivity, pressing a key doesn't wake it CER> up. Nor disconnecting both cables. What works is pressing the CER> menu key of the monitor. [...]
What is the result of;
# cat /sys/devices/system/cpu/cpuidle/current_driver
Regards.
--- ┏━━┓彡 Masaru Nomiya mail-to: m.nomiya+suse @ gmail.com
Some LG monitors have an inbuilt Automatic Standby Mode. Could it be that? There is normally a menu entry for setting it off. DisplayPort versus HDMI may also make a difference. DisplayPort seems to have more ability to signal the state of the monitor - which is not always a good thing.