[Pkg-chromium-maint] Bug#802933: chromium: software rendering causes severe gfx artefacts, consider adding --ignore-gpu-blacklist to default flags

[Ximin Luo]

Package: chromium
Version: 46.0.2490.71-1
Severity: normal

Dear Maintainer,

The Chromium GPU blacklist seems to be a bit overzealous and has too much faith
in the software rendering code. I have been suffering from this bug for many
months across multiple versions of Chromium, and the fix given in the same link
works for me too:

https://bbs.archlinux.org/viewtopic.php?id=181823

TL;DR:

1. Chromium Settings "Use hardware acceleration when available" Yes
2. echo 'CHROMIUM_FLAGS="$CHROMIUM_FLAGS --ignore-gpu-blacklist"' | sudo tee /etc/chromium.d/default-local

"Severe artefacts" include my entire display being replaced, at continuous
random intervals, with the previously active XScreenSaver even when chromium is
not the active window or on the active workspace. Switching workspaces
sometimes cancels the corruption, sometimes it doesn't, but after a few seconds
it always comes back. It's not a very fun game to play whilst trying to work...

X

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.1.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_GB.utf8, LC_CTYPE=en_GB.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages chromium depends on:
ii  libasound2            1.0.29-1
ii  libatk1.0-0           2.18.0-1
ii  libavcodec-ffmpeg56   7:2.8.1-1
ii  libavformat-ffmpeg56  7:2.8.1-1
ii  libavutil-ffmpeg54    7:2.8.1-1
ii  libc6                 2.19-22
ii  libcairo2             1.14.2-2
ii  libcups2              2.1.0-4
ii  libdbus-1-3           1.10.0-3
ii  libexpat1             2.1.0-7
ii  libfontconfig1        2.11.0-6.3
ii  libfreetype6          2.6-2
ii  libgcc1               1:5.2.1-22
ii  libgdk-pixbuf2.0-0    2.32.1-1
ii  libglib2.0-0          2.46.1-1
ii  libgnome-keyring0     3.12.0-1+b1
ii  libgtk2.0-0           2.24.28-1
ii  libjpeg62-turbo       1:1.4.1-2
ii  libnspr4              2:4.10.9-2
ii  libnspr4-0d           2:4.10.9-2
ii  libnss3               2:3.20-1
ii  libnss3-1d            2:3.20-1
ii  libpango-1.0-0        1.38.0-3
ii  libpangocairo-1.0-0   1.38.0-3
ii  libpci3               1:3.3.1-1
ii  libspeechd2           0.8-7
ii  libsrtp0              1.4.5~20130609~dfsg-1.1
ii  libstdc++6            5.2.1-22
ii  libx11-6              2:1.6.3-1
ii  libxcomposite1        1:0.4.4-1
ii  libxcursor1           1:1.1.14-1+b1
ii  libxdamage1           1:1.1.4-2+b1
ii  libxext6              2:1.3.3-1
ii  libxfixes3            1:5.0.1-2+b2
ii  libxi6                2:1.7.5-1
ii  libxml2               2.9.2+zdfsg1-4
ii  libxrandr2            2:1.5.0-1
ii  libxrender1           1:0.9.8-1+b1
ii  libxslt1.1            1.1.28-2+b2
ii  libxss1               1:1.2.2-1
ii  libxtst6              2:1.2.2-1+b1
ii  x11-utils             7.7+3
ii  xdg-utils             1.1.1-1

chromium recommends no packages.

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

-- no debconf information