> On 2020-06-25, at 13:40, Valmor de Almeida <[email protected]> wrote: > > On Thu, Jun 25, 2020 at 9:43 AM Andrew Udvare <[email protected]> wrote: >> >> On 25/06/2020 04:59, Valmor de Almeida wrote: >>> Hello, >>> Does anyone know how to fix Thunderbird UI fonts on a HiDPI >>> Gentoo/OpenBox system with no desktop? >>> A similar problem exists with Firefox but it can be fixed using a CSS >>> file (userChrome.css). However I can't get Thunderbird to work using a >>> similar fix. The UI fonts are so small that the app is useless. >>> Thanks, >>> -- >>> Valmor >>> >> >> Do you have an ~/.Xresources file? It can have something like: >> >> Xft.dpi: 144 >> >> Which is also passed to Xorg for me: -dpi 144 (Plasma does this by >> modifying SDDM service file(s) to systemd). >> > > No I don't have it. I thought the line > > xrandr --dpi 192 & > or > xrandr --output eDP-1 --mode "3840x2160" --scale "0.75x0.75" > > in ~/.xinitrc was sufficient to fix Firefox; it doesn't fix TB. > > I just added > Xft.dpi: 192 > to ~/.Xresources and not only TB works but LibreOffice works too. > Of course all of this defies the purpose of having an HiDPI laptop but > it is either that or no use at all.
For Qt apps you might want these environment variables in .xinitrc: QT_SCREEN_SCALE_FACTORS=DVI-I-0=1.5;DVI-I-1=1.5;HDMI-0=1.5;DP-0=1.5;DP-1=1.5;DP-2=1.5;DP-3=1.5;DP-4=1.5;DP-5=1.5; (These device names are the same as what xrandr shows.) QT_AUTO_SCREEN_SCALE_FACTOR=0 Currently I have an issue where opening Qt apps from certain contexts results in resetting the DPI scale to 2 instead of 1.5. Primarily this happens when Chrome launches a Qt-based viewer such as Kate, and sometimes it happens from Konsole. Have yet to file bugs.
