Hi Timo,
To test I removed the package holds, updated and upgraded to current
released packages, and then rebooted. At this point I confirmed the
issue in the original report.
Next I enabled the xenial-proposed repository, updated and then
installed the following two packages:
sudo apt install xserver-common/xenial-proposed xserver-xorg-core
/xenial-proposed
Then I rebooted. After reboot I confirmed that these proposed xenial
packages did indeed fix the issue. I was once again able to click on
the three line/bar icon in Firefox and see the drop down menu list
display. I also confirmed that there were no regressions in my testing
(no SDDM hang on login, and no screen tearing).
Following is the output you requested earlier.
$ apt-cache policy xserver-xorg-core
xserver-xorg-core:
Installed: 2:1.18.4-0ubuntu0.8
Candidate: 2:1.18.4-0ubuntu0.8
Version table:
*** 2:1.18.4-0ubuntu0.8 400
400 http://archive.ubuntu.com/ubuntu xenial-proposed/main amd64 Packages
100 /var/lib/dpkg/status
2:1.18.4-0ubuntu0.7 500
500 http://ca.archive.ubuntu.com/ubuntu xenial-updates/main amd64
Packages
500 http://security.ubuntu.com/ubuntu xenial-security/main amd64
Packages
2:1.18.3-1ubuntu2 500
500 http://ca.archive.ubuntu.com/ubuntu xenial/main amd64 Packages
$
Thank you very much for fixing this problem and seeing it through to
xenial-proposed. If there is any more steps you need me to take to get this
into an official release package then please let me know.
Sincerely,
Curtis Gedak
** Tags removed: verification-needed
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https://bugs.launchpad.net/bugs/1780664
Title:
Recent libgl-mesa graphics update prevents drop down list menu
appearing in apps like firefox three line/bar menu icon
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