Good day,
I’m having hard time tracking who sets QT_AUTO_SCREEN_SCALE_FACTOR env var. I’m my system it’s set to 0 which make VLC UI look tiny.
I’ve tried to override it with Home-Manager:
systemd.user.sessionVariables = {
QT_AUTO_SCREEN_SCALE_FACTOR = "auto";
FOOBAR = "1";
};
and it made into ~/.config/environment.d/10-home-manager.conf. After apply/relogin/reboot I see that FOOBAR propagates, but QT_AUTO_SCREEN_SCALE_FACTOR is still 0.
Next thing I’ve tried is to trace it with pstee by checking environ in /proc.
In the pstree output below, all of the children of (sd-pam) already have QT_AUTO_SCREEN_SCALE_FACTOR set to 0 while (sd-pam) itself has nothing of that.
Is that some kind of tricky systemd configuration that sets this env var on spawning new process?
systemd(1)─┬─.kwalletd5-wrap(5521)
├─.sddm-wrapped(1272)─┬─.sddm-helper-wr(5517)───.startplasma-wa(5522)
│ └─X(5236)
├─ModemManager(2156)
├─NetworkManager(1000)
├─accounts-daemon(1014)
├─agetty(1270)
├─bluetoothd(921)
├─cupsd(2377)
├─dbus-daemon(929)
├─dockerd(1484)───containerd(1495)
├─iio-sensor-prox(1241)
├─nix-daemon(1068)
├─nsncd(6004)
├─polkitd(1071)
├─power-profiles-(2013)
├─rtkit-daemon(1372)
├─sshd(1074)
├─systemd(1703)─┬─(sd-pam)(1704)
│ ├─.at-spi-bus-lau(2271)
│ ├─.baloo_file-wra(1744)
│ ├─.baloorunner-wr(6066)
│ ├─.dolphin-wrappe(11870)
│ ├─.easyeffects-wr(19840)
│ ├─.gmenudbusmenup(5755)
│ ├─.kactivitymanag(5754)
│ ├─.kdeconnectd-wr(5536)
│ ├─.kded5-wrapped(5678)
│ ├─.kio_http_cache(14318)
│ ├─.ksmserver-wrap(5676)
│ ├─.kwin_wayland_w(5538)───.kwin_wayland-w(5546)───Xwayland(5619)
│ ├─.org_kde_powerd(5757)
│ ├─.plasmashell-wr(5734)
│ ├─.polkit-kde-aut(5756)
│ ├─.xdg-desktop-po(1754)
│ ├─.xdg-desktop-po(8725)
│ ├─.xdg-document-p(1760)───fusermount3(1773)
│ ├─.xdg-permission(1764)
│ ├─.xembedsniproxy(5758)
│ ├─chrome_crashpad(6196)
│ ├─chrome_crashpad(6198)
│ ├─dbus-daemon(1728)
│ ├─dconf-service(2067)
│ ├─obexd(2194)
│ ├─pipewire(1978)
│ ├─pipewire-pulse(2337)
│ ├─ssh-agent(1722)
│ └─wireplumber(1985)
├─systemd-journal(638)
├─systemd-logind(1015)
├─systemd-oomd(877)
├─systemd-timesyn(879)
├─systemd-udevd(765)
├─udisksd(1389)
├─upowerd(1406)
└─wpa_supplicant(1210)