[Pkg-chromium-maint] Bug#783531: chromium: Mouse movement events not firing

[Sam Morris]

Package: chromium
Version: 42.0.2311.90-1~deb8u1
Severity: normal

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Web pages do not respond to mouse movement events. For instance, Google
search results do not get drawn with an underline when I mouse over
them. I also cannot drag pages' scroll bars.

If I scroll the page with the mouse wheel, and the mouse pointer happens
to enter a page element due to the page scrolling the element underneath
it, then the mouse enter event fires, but the mouse pointer remains
virtually stuck inside the element until I scroll the page again.

This happened with version 41 as well. I'm running inside a VirtualBox
VM with these input devices:

$ xinput
⎡ Virtual core pointer                    	id=2	[master pointer  (3)]
⎜   ↳ Virtual core XTEST pointer              	id=4	[slave  pointer  (2)]
⎜   ↳ VirtualBox mouse integration            	id=9	[slave  pointer  (2)]
⎜   ↳ ImExPS/2 Generic Explorer Mouse         	id=11	[slave  pointer  (2)]
⎣ Virtual core keyboard                   	id=3	[master keyboard (2)]
    ↳ Virtual core XTEST keyboard             	id=5	[slave  keyboard (3)]
    ↳ Power Button                            	id=6	[slave  keyboard (3)]
    ↳ Sleep Button                            	id=7	[slave  keyboard (3)]
    ↳ Video Bus                               	id=8	[slave  keyboard (3)]
    ↳ AT Translated Set 2 keyboard            	id=10	[slave  keyboard (3)]

Mouse enter/exit/hover events work find in other programs (e.g., the
scroll bar of the GVim window into which I am typing this bug changes
appearance when I mouse over it, and I can drag the scrollbar just fine)
and xev shows plenty of MotionNotify events when I move the mouse
pointer around in its window.

- -- System Information:
Debian Release: 8.0
  APT prefers stable
  APT policy: (540, 'stable'), (530, 'unstable'), (520, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 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           1.0.28-1
ii  libc6                2.19-18
ii  libcairo2            1.14.0-2.1
ii  libcap2              1:2.24-8
ii  libcups2             1.7.5-11
ii  libdbus-1-3          1.8.16-1
ii  libexpat1            2.1.0-6+b3
ii  libfontconfig1       2.11.0-6.3
ii  libfreetype6         2.5.2-3
ii  libgdk-pixbuf2.0-0   2.31.1-2+b1
ii  libglib2.0-0         2.42.1-1
ii  libgnome-keyring0    3.12.0-1+b1
ii  libgtk2.0-0          2.24.25-3
ii  libharfbuzz0b        0.9.35-2
ii  libjpeg62-turbo      1:1.3.1-12
ii  libnspr4             2:4.10.7-1
ii  libnspr4-0d          2:4.10.7-1
ii  libnss3              2:3.17.2-1.1
ii  libpango-1.0-0       1.36.8-3
ii  libpangocairo-1.0-0  1.36.8-3
ii  libpci3              1:3.2.1-3
ii  libspeechd2          0.8-7
ii  libspeex1            1.2~rc1.2-1
ii  libsrtp0             1.4.5~20130609~dfsg-1.1
ii  libstdc++6           4.9.2-10
ii  libx11-6             2:1.6.2-3
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               2:1.7.4-1+b2
ii  libxml2              2.9.1+dfsg1-5
ii  libxrandr2           2:1.4.2-1+b1
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+2
ii  xdg-utils            1.1.0~rc1+git20111210-7.4

chromium recommends no packages.

Versions of packages chromium suggests:
ii  chromium-inspector  42.0.2311.90-1~deb8u1
pn  chromium-l10n       <none>

- -- no debconf information

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