Public bug reported:
After an upgrade this morning that took in the new version of this
package, and a suite of gnome-session/gnome-settings packages, which may
also be implicated, support for scaling on HiDPI screens seems to have
partially failed. Partially.
BTW I invoked the bug reporter with "ubuntu-bug ubuntu-session" but when
I got to the launchpad page it had pre-filled "gnome-session". One
presumes there's a reason for that so I've left it, especially as this
does affect "GNOME" as well as "Ubuntu" sessions. But I do note a
settings migrations utility in ubuntu-session which I wonder if it might
be implicated. (TBH looking at it it's not obvious why, though it does
reset scaling - that's not the problem, the problem is that it can't be
set back to a combination that works.)
Reminder all the stuff I'm reporting below as being wrongly-scaled was
scaled correctly before the update that just took place. Enpass got a
little help from having some QT env variables set, but that's it.
Logging in under session "Ubuntu" (Wayland - on a different machine as
this one being nvidia doesn't support it) or session "Ubuntu on Xorg" -
also affects GNOME sessions:
* The fonts in the top bar, and the menus and indicators accessible from
there, are unscaled. The indicator icons *are* scaled correctly.
* The fonts in the applications view are unscaled, but the icons and
layout *are* scaled correctly.
* Menu titlebar *text* is unscaled. close/minimize/maximize widgets
*are* scaled correctly, as is the titlebar's size itself.
* The mouse pointer is unscaled.
* Non-Gnome apps, either QT or GTK (examples: enpass, nextcloud-client,
hexchat, sublime text 3) are unscaled, or in some cases are a bit
confused, with some elements correctly scaled, but again fonts are not.
* Also on a personal note, Java 9 JavaFX apps are no longer scaled. (In
Java 8 it was already broken; I was targeting Java 9 with my development
partly *because* its HiDPI support was working in Linux.) FYI Java 9
JavaFX uses GTK3, Java 8 uses GTK2.
## What is working:
* Gnome apps (eg: Terminal, Transmission, Settings, Tweaks, Nautilus,
Gedit etc. etc.) are all fine. Although note those that use a "normal"
titlebar (eg: Terminal) rather than an integrated one (eg: Nautilus)
show small titlebar text as mentioned above
* Google Chrome, Thunderbird, Firefox are fine (although the latter two
aren't being updated for Artful yet, just sayin' ;-)
## What happens if I try to fix it:
gsettings org.gnome.desktop.interface scaling-factor appears to no
longer be operational. Changing its value from 0 (default), 1 and 2
appears to have no effect on anything any more. It used to be setting it
to 2 fixed the few things that weren't right by having it set to 0...
Correction, that *does* fix it for Java 9 JavaFX, it must be reading
that setting directly. But nothing else reported as broken above is
affected by changing this setting. Nor in fact does setting it to 1
cause gnome apps to be unscaled.
gsettings org.gnome.desktop.interface cursor-size is working. I can set
it to 48, double its normal size, to get back normal-sized cursors when
the pointer is over newly-launched applications. But that's obviously a
workaround.
gsettings org.gnome.desktop.interface text-scaling-factor set to 2.0,
also exposed in Gnome Tweaks, unsurprisingly makes text twice as large.
That "fixes" it for the applications that are reported as being unscaled
above, but it also doubles the size of text in gnome apps as well, so
those are now far too large for the windows they're in. Google Chrome is
unaffected by this, as is Java 9 JavaFX, but Thunderbird *is* affected.
I noticed a new gsetting: com.ubuntu.user-interface scale-factor, but it
seems to have a nonsense-value "@a{si} {}". I have no idea if this is
anything in use or if it was an intended Unity 8 thing. I didn't try
anything with it.
ProblemType: Bug
DistroRelease: Ubuntu 17.10
Package: ubuntu-session 3.25.90-0ubuntu2
ProcVersionSignature: Ubuntu 4.12.0-11.12-generic 4.12.5
Uname: Linux 4.12.0-11-generic x86_64
NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
ApportVersion: 2.20.6-0ubuntu7
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sun Aug 27 13:03:53 2017
InstallationDate: Installed on 2017-07-30 (27 days ago)
InstallationMedia: Ubuntu-GNOME 17.04 "Zesty Zapus" - Release amd64 (20170412)
SourcePackage: gnome-session
UpgradeStatus: Upgraded to artful on 2017-08-22 (5 days ago)
** Affects: gnome-session (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug artful
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https://bugs.launchpad.net/bugs/1713323
Title:
HiDPI support partially broken after upgrade
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