Package: chromium
Version: 87.0.4280.141-0.1~deb10u1
Severity: serious
Tags: buster

Dear Maintainer,

I upgraded chromium on Debian stable (buster) from
83.0.4103.116-1~deb10u3 to 87.0.4280.141-0.1~deb10u1.

After this upgrade chromium becomes completely unusable to me, which
means, that the chromium window isn't rendered as expected.
When I open a website or click on a link the web page doesn't show,
also the tab title isn't updated, only the window title changes to the
new page.
Sometimes (if page is already in cache) it seems that the web page is
shown, but usually not completely updated.
But there is a trick to get the web page rendered: Switch to a
different screen and back here and after this the browser window is
rendered as expected.

This at least works sometimes after freshly starting chromium and
keeping it in foreground.  If I once iconize and after this un-iconize
the chromium windows, only the window border is alive, while
everything else looks like I had sent a STOP signal to the browser
process (for example by pressing Ctrl-Z in the shell without entering
fg or bg afterwards), but it was not suspended, as you can see in the
process list.

I observe this strange behavior after the upgrade of chromium on two
different machines (both amd64 buster, but with different home
directories etc.)

I usually use fvwm as window manager, but observe the same problem, if
I start KDE plasma on one of the machines for testing purpose.  The
problem persists, but I'm not sure how to switch screens there to
trigger the "workaround".

A downgrade to 83.0.4103.116-1~deb10u3 solves the issue, upgrading to
87.0.4280.141-0.1~deb10u1 triggers it again.

Using google-chrome-stable 87.0.4280.141-1 works without problems.

Trying to remove ~/.config/chromium or ~/.cache/chromium doesn't solve
the issue.

No entries in dmesg output, while I observe the problems.

No idea what's going wrong here.  It's very astonishing, that I didn't
find tons of bug reports about this.  Am I the only one affected by
this?  But what makes my systems different?

Greetings
Roland


-- System Information:
Debian Release: 10.7
  APT prefers stable
  APT policy: (500, 'stable'), (50, 'unstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.0-13-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_OOT_MODULE, TAINT_UNSIGNED_MODULE
Locale: LANG=de_DE.utf-8, LC_CTYPE=de_DE.utf-8 (charmap=UTF-8), 
LANGUAGE=de_DE:de:en_GB:en (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages chromium depends on:
ii  chromium-common      87.0.4280.141-0.1~deb10u1
ii  libasound2           1.1.8-1
ii  libatk-bridge2.0-0   2.30.0-5
ii  libatk1.0-0          2.30.0-2
ii  libatomic1           8.3.0-6
ii  libatspi2.0-0        2.30.0-7
ii  libavcodec58         7:4.1.6-1~deb10u1
ii  libavformat58        7:4.1.6-1~deb10u1
ii  libavutil56          7:4.1.6-1~deb10u1
ii  libc6                2.28-10
ii  libcairo2            1.16.0-4
ii  libcups2             2.2.10-6+deb10u4
ii  libdbus-1-3          1.12.20-0+deb10u1
ii  libdrm2              2.4.97-1
ii  libevent-2.1-6       2.1.8-stable-4
ii  libexpat1            2.2.6-2+deb10u1
ii  libflac8             1.3.2-3
ii  libfontconfig1       2.13.1-2
ii  libfreetype6         2.9.1-3+deb10u2
ii  libgbm1              18.3.6-2+deb10u1
ii  libgcc1              1:8.3.0-6
ii  libgdk-pixbuf2.0-0   2.38.1+dfsg-1
ii  libglib2.0-0         2.58.3-2+deb10u2
ii  libgtk-3-0           3.24.5-1
ii  libharfbuzz0b        2.3.1-1
ii  libicu63             63.1-6+deb10u1
ii  libjpeg62-turbo      1:1.5.2-2+deb10u1
ii  libjsoncpp1          1.7.4-3
ii  liblcms2-2           2.9-3
ii  libminizip1          1.1-8+b1
ii  libnspr4             2:4.20-1
ii  libnss3              2:3.42.1-1+deb10u3
ii  libopenjp2-7         2.3.0-2+deb10u1
ii  libopus0             1.3-1
ii  libpango-1.0-0       1.42.4-8~deb10u1
ii  libpangocairo-1.0-0  1.42.4-8~deb10u1
ii  libpng16-16          1.6.36-6
ii  libpulse0            12.2-4+deb10u1
ii  libre2-5             20190101+dfsg-2
ii  libsnappy1v5         1.1.7-1
ii  libstdc++6           8.3.0-6
ii  libwebp6             0.6.1-2
ii  libwebpdemux2        0.6.1-2
ii  libwebpmux3          0.6.1-2
ii  libx11-6             2:1.6.7-1+deb10u1
ii  libx11-xcb1          2:1.6.7-1+deb10u1
ii  libxcb1              1.13.1-2
ii  libxcomposite1       1:0.4.4-2
ii  libxdamage1          1:1.1.4-3+b3
ii  libxext6             2:1.3.3-1+b2
ii  libxfixes3           1:5.0.3-1
ii  libxml2              2.9.4+dfsg1-7+deb10u1
ii  libxrandr2           2:1.5.1-1
ii  libxslt1.1           1.1.32-2.2~deb10u1
ii  zlib1g               1:1.2.11.dfsg-1

Versions of packages chromium recommends:
ii  chromium-sandbox  87.0.4280.141-0.1~deb10u1

Versions of packages chromium suggests:
ii  chromium-driver  87.0.4280.141-0.1~deb10u1
ii  chromium-l10n    87.0.4280.141-0.1~deb10u1
ii  chromium-shell   87.0.4280.141-0.1~deb10u1

Versions of packages chromium-common depends on:
ii  libc6       2.28-10
ii  libstdc++6  8.3.0-6
ii  libx11-6    2:1.6.7-1+deb10u1
ii  libxext6    2:1.3.3-1+b2
ii  x11-utils   7.7+4
ii  xdg-utils   1.1.3-1+deb10u1
ii  zlib1g      1:1.2.11.dfsg-1

Versions of packages chromium-common recommends:
ii  chromium-sandbox                     87.0.4280.141-0.1~deb10u1
ii  fonts-liberation                     1:1.07.4-9
ii  libgl1-mesa-dri                      18.3.6-2+deb10u1
ii  libu2f-udev                          1.1.9-1
ii  notification-daemon                  3.20.0-4
ii  system-config-printer                1.5.11-4
ii  upower                               0.99.10-1
ii  xfce4-notifyd [notification-daemon]  0.4.3-1

Versions of packages chromium-driver depends on:
ii  libatomic1      8.3.0-6
ii  libc6           2.28-10
ii  libevent-2.1-6  2.1.8-stable-4
ii  libglib2.0-0    2.58.3-2+deb10u2
ii  libicu63        63.1-6+deb10u1
ii  libminizip1     1.1-8+b1
ii  libnspr4        2:4.20-1
ii  libnss3         2:3.42.1-1+deb10u3
ii  libre2-5        20190101+dfsg-2
ii  libstdc++6      8.3.0-6
ii  libx11-6        2:1.6.7-1+deb10u1
ii  libx11-xcb1     2:1.6.7-1+deb10u1
ii  libxcb1         1.13.1-2
ii  zlib1g          1:1.2.11.dfsg-1

Versions of packages chromium-sandbox depends on:
ii  libc6  2.28-10

-- no debconf information

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