Re: gnome 3.12 and HiDPI

On 04/28/2014 08:07 AM, Flavien Lambert wrote:
> Dear all, after looking in Ubuntu and Fedora forums, I did not find
> relevant information so I try now on this list. I hope that this kind of
> topic is relevant here. If not, all my apologies.
> 
> I run Fedora 20 on a Lenovo  Yoga 2 pro which has a native resolution of
> 3200x1800. Reading about the improvements in the management of HiDPI by
> the version 3.12 of Gnome, I upgraded it from 3.10 thanks to the copr
> reporisitories. Everything went smoothly except that the management of
> HiDPI does not seem to me so different.
> 
> I changed the value of the scaling factor (org gnome desktop interface),
> trying 1 and 2. 1 provides a perfect display of text inside evince and
> web as well as the rest of the whole environment but leads to extremely
> small buttons or bars like 3mm. 2 gives the right size of the elements
> but a very blurred rendering of the text with evince and web. I tried to
> modify the text size, with a scaling factor of 1, by increasing the font
> size but, unfortunately, only parts of the buttons are displayed with a
> consistent size.
> 
> Is there a particular set of parameters to obtain a correct display?
> 
> Best regards,
> Flavien.
> 
> 
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Setting the scaling factor to 2 is what's intended for HiDPI users. The
fact that Evince and Web are blurry are bugs in the two projects.

Evince:
https://bugzilla.gnome.org/show_bug.cgi?id=723431

WebKitGTK:
https://bugs.webkit.org/show_bug.cgi?id=131347

as documented in the evince bug, if you have scaling factor set to 2,
you can still launch evince with the scaling factor set to 1 only for
that application by running the following from the terminal:

GDK_SCALE=1 evince

You may be able to always set the environment variable via the
evince.desktop file:
http://askubuntu.com/questions/144968/set-variable-in-desktop-file