Comment 0 for bug 1780664

PROBLEM

Recent libgl-mesa 18.0.5-0ubuntu0~16.04.1 graphics update prevents
drop down list menu appearing in apps like firefox three line/bar menu
icon.

After recently applying updates, left clicking on some application
menus and icons no longer displays a drop-down menu list.

For example in Firefox when I left-click on the **three line/bar**
icon in the upper right-hand corner, the normal drop down list menu
does not display. Also the menu drop down doesn't display in
keypassx. Further xchat-gnome doesn't even display a window.

Another anomaly is that my KDE bottom menu bar changed to a dark
theme.

BACKGROUND

I'm using Kubuntu 16.04 on an Intel i7-7700k computer with Intel HD
Graphics. I have KDE **System Settings -> Compositor** enabled with:

   Scale method : Accurate
   Rendering backend: OpenGL 3.1
   OpenGL interface: GLX
   Tearing prevention ("vsync"): Full screen repaints
   Keep window thumbnails: Only for Shown Windows

INVESTIGATION

After several hours of searching the Internet I found one other case
of a similar problem.

   Firefox's Menu Bar won't open
   https://support.mozilla.org/en-US/questions/1194760

The reported solution was to rollback the graphics drivers.

Because the issues cropped up after applying updates on July 6, 2018,
I tracked down the list of recent updates with:

   grep -A 2 'Start-Date: 2018-07-06' /var/log/apt/history.log | tail -1 >packages.txt

After some editing to place packages on separate lines, and
identifying the grahics libraries, I arrived at the following list:

------------------------------

libgles2-mesa:amd64 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
libglapi-mesa:amd64 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
libglapi-mesa:i386 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
libxatracker2:amd64 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
libegl1-mesa:amd64 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
libgbm1:amd64 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
libwayland-egl1-mesa:amd64 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
libgl1-mesa-dri:amd64 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
libgl1-mesa-dri:i386 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
libosmesa6:amd64 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
libosmesa6:i386 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
libgl1-mesa-glx:amd64 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
libgl1-mesa-glx:i386 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)
mesa-vdpau-drivers:amd64 (17.2.8-0ubuntu0~16.04.1 18.0.5-0ubuntu0~16.04.1)

------------------------------

To revert to the prior graphic drivers I tracked down the '.deb'
packages for each of the above packages and downloaded the
'17.2.8-0ubuntu0~16.04.1' version.

For example:

https://launchpad.net/ubuntu/xenial/amd64/libxatracker2/17.2.8-0ubuntu0~16.04.1

I also discovered that some of these depended on
libllvm5.0_5.0-3~16.04.1 so I also downloaded the following files:

  libllvm5.0_5.0-3~16.04.1_amd64.deb
  libllvm5.0_5.0-3~16.04.1_i386.deb

WORKAROUND (ROLLBACK TO PRIOR VERSION)

Install older versions with:

sudo dpkg -i \
  libllvm5.0_5.0-3~16.04.1_amd64.deb \
  libllvm5.0_5.0-3~16.04.1_i386.deb \
  libegl1-mesa_17.2.8-0ubuntu0~16.04.1_amd64.deb \
  libgbm1_17.2.8-0ubuntu0~16.04.1_amd64.deb \
  libgl1-mesa-dri_17.2.8-0ubuntu0~16.04.1_amd64.deb \
  libgl1-mesa-dri_17.2.8-0ubuntu0~16.04.1_i386.deb \
  libgl1-mesa-glx_17.2.8-0ubuntu0~16.04.1_amd64.deb \
  libgl1-mesa-glx_17.2.8-0ubuntu0~16.04.1_i386.deb \
  libglapi-mesa_17.2.8-0ubuntu0~16.04.1_amd64.deb \
  libglapi-mesa_17.2.8-0ubuntu0~16.04.1_i386.deb \
  libgles2-mesa_17.2.8-0ubuntu0~16.04.1_amd64.deb \
  libosmesa6_17.2.8-0ubuntu0~16.04.1_amd64.deb \
  libosmesa6_17.2.8-0ubuntu0~16.04.1_i386.deb \
  libwayland-egl1-mesa_17.2.8-0ubuntu0~16.04.1_amd64.deb \
  libxatracker2_17.2.8-0ubuntu0~16.04.1_amd64.deb \
  mesa-vdpau-drivers_17.2.8-0ubuntu0~16.04.1_amd64.deb

After rebooting, all the issues disappeared.

For example I was once again able to left-click on the Firefox **three
line/bar** menu and view the drop down list menu. Also the KDE bottom
menu bar retured to the normal "breeze" light grey colour.