Specify DPI on Wayland?

[oldherl]

I'm using sddm on wayland with EnableHiDPI=true, but the texts and buttons are very small (perhaps scale=1). When I was using X11, I used "ServerArguments=-nolisten tcp -dpi 192" but it doesn't work on wayland. Is there a way to specify DPI on wayland?

[Vogtinator]

Depends on the compositor you use. I'm not aware of any options for either weston or kwin.

You can try

[General]
GreeterEnvironment=QT_SCREEN_SCALE_FACTORS=2,QT_FONT_DPI=192

[plata]

If I set QT_SCREEN_SCALE_FACTORS, Maliit doesn't show up anymore. QT_FONT_DPI only works.

[Zosoled]

The X11 option still seems to work for me using Wayland on KDE. PEBKAC, does not work.
The following is my only custom SDDM conf file:

/etc/sddm.conf.d/10_hidpi.conf
[General]
DisplayServer=wayland
Numlock=on

[X11]
ServerArguments=-nolisten tcp -dpi 190

Arch Linux kernel 6.6.10
KDE Plasma 5.27.10
Wayland 1.22.0
SDDM 0.20.0
SDDM theme "Sweet Mars"

[Vogtinator]

The X11 option still seems to work for me using Wayland on KDE.

It cannot. With DisplayServer=wayland, ServerArguments is not used at all for the greeter.

[Zosoled]

My mistake; I did not have weston installed, so the greeter was failing to start Wayland and falling back to X11. Installing weston resulted in a segfault and a black screen, so I uninstalled and reverted to the X11 option.