Re: [gentoo-user] Re: High resolution on a 13 inch screen

[Grant <emailgrant@gmail.com>]

>>>>> My laptop's 13" screen has a native resolution of 3200x1800 which
>>>>> makes everything crazy small on-screen.  Is there a good method for
>>>>> telling Xorg or xfce4 to compensate, or should I one-at-a-time my
>>>>> applications?
>>>>
>>>>
>>>> Depends on your desktop. I'm not sure if XFCE supports this, but in KDE
>>>> everything scales to my monitor's DPI automatically.
>>>>
>>>> What is the output of:
>>>>
>>>>    xdpyinfo | grep -i resolution
>>>>
>>>> (The utility is in the x11-apps/xdpyinfo package.)
>>>>
>>>> On such a small screen, the result should be a very high DPI (around
>>>> 282.)
>>>> If that's not the number you get, then your graphics driver is reporting
>>>> it
>>>> wrong to Xorg, and you need to set it manually.
>>>
>>>
>>> This led me to the DisplaySize parameter for xorg.conf which helps a lot.
>>>
>>
>> Is there a way to digitally discover the true height and width of your
>> screen in mm?
>
>
> Yes. xdpyinfo shows the information:
>
>   xdpyinfo | grep -B2 resolution
>
> If the information is wrong, that usually means one of two things (sometimes
> even both): a) the video driver is reporting the wrong size to Xorg, and/or
> b) the screen is reporting the wrong size to the driver.


I'm getting strange results from xdpyinfo.  I always get 96x96 DPI and
the screen size changes along with the resolution.  When I run 'xrandr
--dpi 200x200' and check xdpyinfo, it reports correctly.  But if I log
out and back in to xfce4 without doing anything else, it gives me
96x96 again.

- Grant