Arch Linux

orbit1849

Member

Registered: 2022-10-13

Posts: 13

Samsung G93SC goes to sleep and doesn't wake up

I have a Samsung G93SC which supports 5120x1440 at 240 Hz. This works fine on a Windows computer.

On my Arch system, even using the same physical graphics card in the Windows computer (a 4070ti), it only works at lower refresh rates, 60 and 120 Hz.

However, even at 60 Hz, it has a problem with going to sleep and not waking up again. This also only happens on the Arch system, not on Windows.

I've tried to disable everything I can in the OSD for the monitor related to sleep, power savings, adaptive sync, etc. I've tried on the host computer to disable DPMS with xset -dpms.

I've tried a different graphics card (3090 and 4070ti). I've tried three different cables (DP and HDMI, HDMI only goes up to 120 Hz though at that resolution, I'm aware of this).

I've tried different nvidia drivers (I cannot use nouveau, I need CUDA, etc.), probably 8 different drivers.

I have another smaller monitor also connected, but I've tried without that one connected, same issue.

I've tried to upgrade the firmware on the problematic Samsung monitor.

I've tried to make my own X config and fiddle around with it.

Section "ServerLayout"
    Identifier     "X.org Configured"
    Screen      0  "Screen0" 0 0
    InputDevice    "Mouse0" "CorePointer"
    InputDevice    "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
    ModulePath   "/usr/lib/xorg/modules"
    FontPath     "/usr/share/fonts/misc"
    FontPath     "/usr/share/fonts/TTF"
    FontPath     "/usr/share/fonts/OTF"
    FontPath     "/usr/share/fonts/Type1"
    FontPath     "/usr/share/fonts/100dpi"
    FontPath     "/usr/share/fonts/75dpi"
EndSection

Section "Module"
    Load  "glx"
    Load  "vnc"
EndSection

Section "InputDevice"
    Identifier  "Keyboard0"
    Driver      "kbd"
EndSection

Section "InputDevice"
    Identifier  "Mouse0"
    Driver      "mouse"
    Option      "Protocol" "auto"
    Option      "Device" "/dev/input/mice"
    Option      "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
    Identifier "DP-0"
    Option "PreferredMode" "5120x1440"
    Option "Position" "0 480"
    Option "Rotate" "normal"
    Option "Rate" "60"
EndSection

Section "Monitor"
    Identifier "DP-2"
    Option "PreferredMode" "1920x1200"
    Option "Position" "5120 0"
    Option "Rotate" "left"
EndSection

Section "Device"
    Identifier  "Card0"
    Driver      "nvidia"
    BusID       "PCI:46:0:0"
    Option "AllowEmptyInitialConfiguration"
EndSection

Section "Screen"
    Identifier "Screen0"
    Monitor "DP-0"
    Monitor "DP-2"
    Device "Card0"
    Option "DPI" "96 x 96"
EndSection

Any ideas for things I could try? I can live with 60 Hz at 5120x1440, although it is quite sad considering it is capable of 240 Hz at 5120x1440 on Windows.

However, I cannot live with 3840x1080, the image is too unclear for me, and 3840x1080 is the only resolution it works reliably on so far. On 5120x1440 it goes to sleep, and never wakes up again. If I fiddle enough with xrandr, power the monitor on and off, remove and reinsert the cable, I can sometimes get it back, but this isn't a sustainable solution.