Comment 5 for bug 1611982

I'm going to test Ubuntu GNOME w/Vivid stack tomorrow but tonight I ran a Lubuntu w/Utopic HWE upgrade and I think all looks fine:

sudo /usr/lib/update-notifier/update-motd-hwe-eol shows:

WARNING: Security updates for your current Hardware Enablement
Stack ended on 2016-08-04:
 * http://wiki.ubuntu.com/1404_HWE_EOL

There is a graphics stack installed on this system. An upgrade to a
configuration supported for the full lifetime of the LTS will become
available on 2016-07-21 and can be installed by running 'update-manager'
in the Dash.

The same appears if I run hwe-support-status --verbose. Then:

lance@lance-desktop:~$ hwe-support-status --show-all-unsupported
xserver-xorg-video-cirrus-lts-utopic
xserver-xorg-input-evdev-lts-utopic xserver-xorg-video-all-lts-utopic
xserver-xorg-video-radeon-lts-utopic
xserver-xorg-video-tdfx-lts-utopic
xserver-xorg-input-synaptics-lts-utopic
xserver-xorg-video-savage-lts-utopic linux-generic-lts-utopic
xserver-xorg-video-fbdev-lts-utopic
xserver-xorg-input-mouse-lts-utopic
xserver-xorg-video-openchrome-lts-utopic
xserver-xorg-input-vmmouse-lts-utopic
xserver-xorg-input-all-lts-utopic libegl1-mesa-lts-utopic
xserver-xorg-input-wacom-lts-utopic libxatracker2-lts-utopic
libopenvg1-mesa-lts-utopic libgl1-mesa-dri-lts-utopic
libglapi-mesa-lts-utopic xserver-xorg-video-mach64-lts-utopic
libgl1-mesa-glx-lts-utopic
xserver-xorg-video-siliconmotion-lts-utopic
linux-image-extra-3.16.0-30-generic
xserver-xorg-video-r128-lts-utopic
xserver-xorg-video-vmware-lts-utopic
xserver-xorg-video-intel-lts-utopic
xserver-xorg-video-nouveau-lts-utopic
xserver-xorg-video-vesa-lts-utopic
xserver-xorg-video-neomagic-lts-utopic xserver-xorg-lts-utopic
xserver-xorg-video-modesetting-lts-utopic
xserver-xorg-video-trident-lts-utopic
linux-image-extra-3.16.0-77-generic xserver-xorg-core-lts-utopic
xserver-xorg-video-sisusb-lts-utopic
xserver-xorg-video-ati-lts-utopic linux-image-3.16.0-30-generic
libgbm1-lts-utopic linux-image-generic-lts-utopic
libegl1-mesa-drivers-lts-utopic linux-headers-generic-lts-utopic
xserver-xorg-video-mga-lts-utopic libwayland-egl1-mesa-lts-utopic
linux-image-3.16.0-77-generic

And:

hwe-support-status --show-replacements
linux-image-generic-lts-xenial xserver-xorg-lts-xenial libgl1-mesa-glx-lts-xenial linux-generic-lts-xenial libwayland-egl1-mesa-lts-xenial

At that point I went ahead and re-enabled proposed so I could test the HWE upgrade via GUI and I think all went well. Afterwards:

lance@lance-desktop:~$ apt-cache policy xserver-xorg-video-r128-lts-xenial
xserver-xorg-video-r128-lts-xenial:
  Installed: 6.10.0-1build2~trusty1
  Candidate: 6.10.0-1build2~trusty1
  Version table:
 *** 6.10.0-1build2~trusty1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
        100 /var/lib/dpkg/status

lance@lance-desktop:~$ apt-cache policy xserver-xorg-video-mach64-lts-xenial
xserver-xorg-video-mach64-lts-xenial:
  Installed: 6.9.5-1build2~trusty1
  Candidate: 6.9.5-1build2~trusty1
  Version table:
 *** 6.9.5-1build2~trusty1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
        100 /var/lib/dpkg/status
lance@lance-desktop:~$ apt-cache policy xserver-xorg-video-ati*

lance@lance-desktop:~$ apt-cache policy xserver-xorg-video-ati*
xserver-xorg-video-ati-lts-utopic-dbg:
  Installed: (none)
  Candidate: 1:7.4.0-2ubuntu2~trusty1
  Version table:
     1:7.4.0-2ubuntu2~trusty1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
xserver-xorg-video-ati-dbg:
  Installed: (none)
  Candidate: 1:7.3.0-1ubuntu3.1
  Version table:
     1:7.3.0-1ubuntu3.1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
     1:7.3.0-1ubuntu3 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
xserver-xorg-video-ati-lts-saucy-dbg:
  Installed: (none)
  Candidate: 3:6
  Version table:
     3:6 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
     3:5 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
xserver-xorg-video-ati-lts-wily:
  Installed: (none)
  Candidate: 1:7.5.0+git20150819-0ubuntu1~trusty1
  Version table:
     1:7.5.0+git20150819-0ubuntu1~trusty1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
xserver-xorg-video-ati-lts-trusty:
  Installed: (none)
  Candidate: 3:6
  Version table:
     3:6 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
xserver-xorg-video-ati-lts-vivid:
  Installed: (none)
  Candidate: 1:7.5.0-1ubuntu2~trusty1
  Version table:
     1:7.5.0-1ubuntu2~trusty1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
xserver-xorg-video-ati-lts-vivid-dbg:
  Installed: (none)
  Candidate: 1:7.5.0-1ubuntu2~trusty1
  Version table:
     1:7.5.0-1ubuntu2~trusty1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
xserver-xorg-video-ati-lts-quantal:
  Installed: (none)
  Candidate: 3:6
  Version table:
     3:6 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
     3:5 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
xserver-xorg-video-ati-lts-raring-dbg:
  Installed: (none)
  Candidate: 3:6
  Version table:
     3:6 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
     3:5 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
xserver-xorg-video-ati-lts-wily-dbg:
  Installed: (none)
  Candidate: 1:7.5.0+git20150819-0ubuntu1~trusty1
  Version table:
     1:7.5.0+git20150819-0ubuntu1~trusty1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
xserver-xorg-video-ati-lts-trusty-dbg:
  Installed: (none)
  Candidate: 3:6
  Version table:
     3:6 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
xserver-xorg-video-ati-lts-utopic:
  Installed: (none)
  Candidate: 1:7.4.0-2ubuntu2~trusty1
  Version table:
     1:7.4.0-2ubuntu2~trusty1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
xserver-xorg-video-ati-lts-xenial-dbg:
  Installed: (none)
  Candidate: 1:7.7.0-1~trusty2
  Version table:
     1:7.7.0-1~trusty2 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-proposed/main i386 Packages
     1:7.7.0-1~trusty1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
xserver-xorg-video-ati-lts-raring:
  Installed: (none)
  Candidate: 3:6
  Version table:
     3:6 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
     3:5 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
xserver-xorg-video-ati-lts-saucy:
  Installed: (none)
  Candidate: 3:6
  Version table:
     3:6 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
     3:5 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
xserver-xorg-video-ati-lts-quantal-dbg:
  Installed: (none)
  Candidate: 3:6
  Version table:
     3:6 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
     3:5 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
xserver-xorg-video-ati:
  Installed: (none)
  Candidate: 1:7.3.0-1ubuntu3.1
  Version table:
     1:7.3.0-1ubuntu3.1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages
     1:7.3.0-1ubuntu3 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty/main i386 Packages
xserver-xorg-video-ati-lts-xenial:
  Installed: 1:7.7.0-1~trusty2
  Candidate: 1:7.7.0-1~trusty2
  Version table:
 *** 1:7.7.0-1~trusty2 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-proposed/main i386 Packages
        100 /var/lib/dpkg/status
     1:7.7.0-1~trusty1 0
        500 http://us.archive.ubuntu.com/ubuntu/ trusty-updates/main i386 Packages