[Pkg-chromium-maint] Bug#871542: chromium: Chromium 60 UI is huge on HiDPI displays

[Yuri D'Elia]

Package: chromium
Version: 61.0.3163.100-2
Followup-For: Bug #871542

I was also hit by this bug with Chromium 61.
At 2560x1440 the UI is just overblown.

Using an 1.5 scale factor fixes the size to something acceptable, but
only when I'm using the laptop's screen. When booting with an external
screen, the DPI is lower, and thus the environment variable needs to be
changed.

I don't understand why Chromium is not using the reported DPI setting
(values reported by XRandR are correct!) and instead is introducing
another useless scaling factor!

-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (900, 'unstable'), (800, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 4.12.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages chromium depends on:
ii  chromium-common      61.0.3163.100-2
ii  libasound2           1.1.3-5
ii  libatk1.0-0          2.26.0-2
ii  libavcodec57         10:3.3.4-dmo1
ii  libavformat57        10:3.3.4-dmo1
ii  libavutil55          10:3.3.4-dmo1
ii  libc6                2.24-17
ii  libcairo2            1.14.10-1
ii  libcups2             2.2.4-7
ii  libdbus-1-3          1.11.18-1
ii  libevent-2.1-6       2.1.8-stable-4
ii  libexpat1            2.2.3-1
ii  libflac8             1.3.2-1
ii  libfontconfig1       2.12.3-0.2
ii  libfreetype6         2.8-0.2
ii  libgcc1              1:7.2.0-10.0+really6~reproducible1
ii  libgdk-pixbuf2.0-0   2.36.10-2
ii  libglib2.0-0         2.54.0-1
ii  libgtk2.0-0          2.24.31-2
ii  libharfbuzz0b        1.4.2-1
ii  libicu57             57.1-6
ii  libjpeg62-turbo      1:1.5.2-2
ii  liblcms2-2           2.8-4
ii  libminizip1          1.1-8+b1
ii  libnspr4             2:4.16-1
ii  libnss3              2:3.32-2
ii  libopus0             1.2.1-1
ii  libpango-1.0-0       1.40.12-1
ii  libpangocairo-1.0-0  1.40.12-1
ii  libpng16-16          1.6.32-3
ii  libpulse0            11.1-1
ii  libre2-3             20170101+dfsg-1
ii  libsnappy1v5         1.1.7-1
ii  libstdc++6           7.2.0-10.0+really6~reproducible1
ii  libvpx4              1.6.1-3
ii  libwebp6             0.6.0-3
ii  libwebpdemux2        0.6.0-3
ii  libwebpmux3          0.6.0-3
ii  libx11-6             2:1.6.4-3
ii  libx11-xcb1          2:1.6.4-3
ii  libxcb1              1.12-1
ii  libxcomposite1       1:0.4.4-2
ii  libxcursor1          1:1.1.14-3
ii  libxdamage1          1:1.1.4-3
ii  libxext6             2:1.3.3-1+b2
ii  libxfixes3           1:5.0.3-1
ii  libxi6               2:1.7.9-1
ii  libxml2              2.9.4+dfsg1-4
ii  libxrandr2           2:1.5.1-1
ii  libxrender1          1:0.9.10-1
ii  libxslt1.1           1.1.29-2.1
ii  libxss1              1:1.2.2-1+b2
ii  libxtst6             2:1.2.3-1
ii  zlib1g               1:1.2.8.dfsg-5

Versions of packages chromium recommends:
ii  fonts-liberation  1:1.07.4-2

Versions of packages chromium suggests:
pn  chromium-driver    <none>
pn  chromium-l10n      <none>
pn  chromium-shell     <none>
pn  chromium-widevine  <none>