FVWM: Firefox on HDPI screen

Dan Espen <[email protected]> writes:

> Thomas Adam <[email protected]> writes:
>
>> On Wed, Aug 12, 2020 at 06:54:53PM -0400, Dan Espen wrote:
>>> Recently I went from a 1600x1200 monitor to a 3840x2160 monitor.
>>> 
>>> Fvwm was the least of my problems.
>>
>> Same here.  Mind you, even on laptops with 4K screens (so-called HiDPI), the
>> situation is diabolical.  X11 really doesn't work seamlessly in these
>> conditions.  I've resorted to all sorts of xrandr --dpi tricks without much
>> success.
>>
>> Even if you do manage to get some scaling working, you're still left with the
>> various widget libraries playing nicely with different applications.  For
>> example, on this laptop which has:
>>
>> % xdpyinfo | grep dimensions
>>   dimensions:    3840x2160 pixels (1016x571 millimeters)
>>
>> Firefox looks fine now that I've wrangled everything, but menus, buttons and
>> other widgets are so small I can't even see what I'm clicking on half the
>> time.  Messing with GDK_SCALE env var and others helps, but it's still not
>> great.
>
> Hmm, I got the Firefox menus under control but I'm going to have to dig
> to find out what I did.  I remember struggling with it for a while.

Found my notes on Firefox (copy pasted from somewhere):

  Firefox implements  a similar  sort of pixel  scaling, but  it doesn't
  seem to figure  out when to use it  on its own. The solution  is to go
  into  about:config and  set  the layout.css.devPixelsPerPx  knob to  a
  value like two.

-- 
Dan Espen