Debian Stretch, KDE & DPI settings

[j5h]

Hi,

I have fresh Stretch installation and kde-plasma-desktop installed into it. I have 4k screen and when I try to make DPI bigger from Displays - Scale Display, it does not affect to DPI settings.
Do you know how to fix it? I using backports reposititories.

[bw123]

There is a 'font' dpi setting in the systemsettings, but on my big crt I use this

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xrandr --dpi 100

in ~/.config/autostart-scripts/whatever.sh

the xdpyinfo command will tell you more about your setup.

[j5h]

There is a 'font' dpi setting in the systemsettings, but on my big crt I use this

Code: Select all

xrandr --dpi 100

in ~/.config/autostart-scripts/whatever.sh

the xdpyinfo command will tell you more about your setup.

Nothing happens when I give that command. :/

[bw123]

Nothing happens when I give that command. :/

Are you sure" Works fine here, although 100 is a very slight change from the default. You should read man pages before using commands from the internet.

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$ xdpyinfo | grep reso
  resolution:    96x96 dots per inch
$ xrandr --dpi 100
$ xdpyinfo | grep reso
  resolution:    100x100 dots per inch
$ xrandr --dpi 96
$ xdpyinfo | grep reso
  resolution:    96x96 dots per inch

[j5h]

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$ xrandr --dpi 120
$ xdpyinfo | grep reso
resolution:    120x120 dots per inch

I can change dpi value, but it wont change anything..

[bw123]

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$ xrandr --dpi 120
$ xdpyinfo | grep reso
resolution:    120x120 dots per inch

I can change dpi value, but it wont change anything..

There are a lot of internet posts about it, one of the better ones is here.
https://wiki.archlinux.org/index.php/HiDPI#KDE

Setting dpi probably isn't what you want. What you want is to find good settings for font, icon, tray, and scale and that will take a little work and experimenting to find what you like.

[j5h]

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$ sudo apt install plasma-workspace-wayland

I think this is solution to this, but there's some problems after login to Wayland. Everything is too big and primary display is unknown. Something wrong with graphic card drivers I guess.

[j5h]

Has anyone used Wayland with Debian? This is totally new stuff for me, so I don't how to proceed. Does Wayland even use Xorg drivers or are drivers handled other way?

[j5h]

Seems that Wayland does not work with Debian or I just do not know how to configure it. It's a shame that only Gnome can handle 4k screens.

[sunrat]

Seems that Wayland does not work with Debian or I just do not know how to configure it. It's a shame that only Gnome can handle 4k screens.

I've been using KDE Plasma 5 with a 4K monitor for over a year. It looks excellent. I set System Settings > Fonts - Force fonts DPI to 160 and resized the panel but don't remember exactly what else. The Arch wiki page bw123 posted is very helpful.
I did not use Wayland. It's still a bit too experimental.
4K support is also dependent on the capabilities of your video card and its driver.