Firefox "hamburger" menu not visible

[Ed Novak]

When using firefox there is a button on the top right (there is a "hamburger" style icon on it) that opens a menu. Since a recent software update I noticed that this menu is not visible on my system. I attached a screenshot to show how it doesn't show up even after the button is clicked :P

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: xserver-xorg-video-intel 2:2.99.917+git20160325-1ubuntu1.2
ProcVersionSignature: Ubuntu 4.4.0-130.156-generic 4.4.134
Uname: Linux 4.4.0-130-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
CurrentDesktop: KDE
Date: Mon Jul 16 20:32:05 2018
InstallationDate: Installed on 2016-04-25 (812 days ago)
InstallationMedia: Kubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
SourcePackage: xserver-xorg-video-intel
UpgradeStatus: Upgraded to xenial on 2018-07-17 (0 days ago)

[Paul White (paulw2u)]

See also bug 1782096 filed against Firefox

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[udippel (udippel)]

I don't think it affects xserver-xorg-video-intel (Ubuntu), actually.
I agree with the assumption of a KDE-problem. Since it affects only certain applications, and even only certain menues in that application. In my case 'bookmarks' is clickable, 'menu' not.

[Ed Novak (ejnovak)]

I think it is related to the graphics driver (I am using i915) so I issued the bug for the xserver-xorg-video-intel package which provides that driver. I have tried booting different kernels, for example 4.4.0-66-generic https://packages.ubuntu.com/xenial/linux-image-4.4.0-66-generic but I forgot to install linux-image-extra-4.4.0-66-generic https://packages.ubuntu.com/xenial/linux-image-extra-4.4.0-66-generic

The result is that many of my kernel modules were missing (e.g., my WiFi driver, my graphics driver, my EVDI driver, etc.). When I booted in this state obviously many things were not working. But, my Firefox menus were working. My display was using some fallback driver presumably, which gave me a working low-res display.

If I then install linux-image-extra-4.4.0-66-generic and reboot everything would be "back to normal" except that I was running on a slightly older kernel. However, the menus on Firefox would re-break. So there is almost definitely some kernel module that is causing the problem.

I can do repeat these test and provide more details if it's helpful. Also, https://bugs.launchpad.net/bugs/1782096 sounds identical (as well as the bug that is referenced in the comments of 1782096).

[Wes (wesinator)]

Related: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/1780664

[Patrick Wigmore (patrick-wigmore)]

If those affected think this is the same bug, you could mark this bug as a duplicate of #1780664. Bug #1780664 has a fix committed now, which should be available in xenial-updates soon.